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-rw-r--r--gnuradio-examples/grc/.gitignore2
-rw-r--r--gnuradio-examples/grc/Makefile.am61
-rw-r--r--gnuradio-examples/grc/audio/cvsd_sweep.grc918
-rw-r--r--gnuradio-examples/grc/audio/dial_tone.grc375
-rw-r--r--gnuradio-examples/grc/demod/mpsk_demod.grc586
-rw-r--r--gnuradio-examples/grc/demod/pam_timing.grc1424
-rw-r--r--gnuradio-examples/grc/simple/ber_simulation.grc564
-rw-r--r--gnuradio-examples/grc/simple/dpsk_loopback.grc450
-rw-r--r--gnuradio-examples/grc/simple/var_sink_taps.grc488
-rw-r--r--gnuradio-examples/grc/simple/variable_config.grc329
-rw-r--r--gnuradio-examples/grc/trellis/interference_cancellation.grc2072
-rw-r--r--gnuradio-examples/grc/trellis/readme.txt16
-rw-r--r--gnuradio-examples/grc/usrp/usrp2_const_wave.grc252
-rw-r--r--gnuradio-examples/grc/usrp/usrp2_dpsk_mod.grc693
-rw-r--r--gnuradio-examples/grc/usrp/usrp2_fft.grc264
-rw-r--r--gnuradio-examples/grc/usrp/usrp_two_tone_loopback.grc749
-rw-r--r--gnuradio-examples/grc/usrp/usrp_wbfm_receive.grc466
-rw-r--r--gnuradio-examples/grc/xmlrpc/readme.txt18
-rw-r--r--gnuradio-examples/grc/xmlrpc/xmlrpc_client.grc312
-rw-r--r--gnuradio-examples/grc/xmlrpc/xmlrpc_client_script.py23
-rw-r--r--gnuradio-examples/grc/xmlrpc/xmlrpc_server.grc384
21 files changed, 10446 insertions, 0 deletions
diff --git a/gnuradio-examples/grc/.gitignore b/gnuradio-examples/grc/.gitignore
new file mode 100644
index 000000000..b336cc7ce
--- /dev/null
+++ b/gnuradio-examples/grc/.gitignore
@@ -0,0 +1,2 @@
+/Makefile
+/Makefile.in
diff --git a/gnuradio-examples/grc/Makefile.am b/gnuradio-examples/grc/Makefile.am
new file mode 100644
index 000000000..97417c5a2
--- /dev/null
+++ b/gnuradio-examples/grc/Makefile.am
@@ -0,0 +1,61 @@
+#
+# Copyright 2009 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING. If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+include $(top_srcdir)/Makefile.common
+
+grc_examples_prefix = $(exampledir)/grc
+
+audiodatadir = $(grc_examples_prefix)/audio
+dist_audiodata_DATA = \
+ audio/dial_tone.grc \
+ audio/cvsd_sweep.grc
+
+demoddatadir = $(grc_examples_prefix)/demod
+dist_demoddata_DATA = \
+ demod/mpsk_demod.grc \
+ demod/pam_timing.grc
+
+simpledatadir = $(grc_examples_prefix)/simple
+dist_simpledata_DATA = \
+ simple/ber_simulation.grc \
+ simple/dpsk_loopback.grc \
+ simple/variable_config.grc \
+ simple/var_sink_taps.grc
+
+trellisdatadir = $(grc_examples_prefix)/trellis
+dist_trellisdata_DATA = \
+ trellis/readme.txt \
+ trellis/interference_cancellation.grc
+
+usrpdatadir = $(grc_examples_prefix)/usrp
+dist_usrpdata_DATA = \
+ usrp/usrp2_const_wave.grc \
+ usrp/usrp2_dpsk_mod.grc \
+ usrp/usrp2_fft.grc \
+ usrp/usrp_two_tone_loopback.grc \
+ usrp/usrp_wbfm_receive.grc
+
+xmlrpcdatadir = $(grc_examples_prefix)/xmlrpc
+dist_xmlrpcdata_DATA = \
+ xmlrpc/readme.txt \
+ xmlrpc/xmlrpc_client.grc \
+ xmlrpc/xmlrpc_client_script.py\
+ xmlrpc/xmlrpc_server.grc
diff --git a/gnuradio-examples/grc/audio/cvsd_sweep.grc b/gnuradio-examples/grc/audio/cvsd_sweep.grc
new file mode 100644
index 000000000..8d0b385ce
--- /dev/null
+++ b/gnuradio-examples/grc/audio/cvsd_sweep.grc
@@ -0,0 +1,918 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Sat Sep 19 20:30:08 2009</timestamp>
+ <block>
+ <key>import</key>
+ <param>
+ <key>id</key>
+ <value>import_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>import</key>
+ <value>import math</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(157, 11)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blks2_cvsd_decode</key>
+ <param>
+ <key>id</key>
+ <value>blks2_cvsd_decode_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>resample</key>
+ <value>resample</value>
+ </param>
+ <param>
+ <key>bw</key>
+ <value>bw</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(887, 340)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sig_source_x</key>
+ <param>
+ <key>id</key>
+ <value>tri_source</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>audio_rate</value>
+ </param>
+ <param>
+ <key>waveform</key>
+ <value>gr.GR_TRI_WAVE</value>
+ </param>
+ <param>
+ <key>freq</key>
+ <value>0.05</value>
+ </param>
+ <param>
+ <key>amp</key>
+ <value>0.5</value>
+ </param>
+ <param>
+ <key>offset</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(44, 316)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_throttle</key>
+ <param>
+ <key>id</key>
+ <value>throttle</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>samples_per_second</key>
+ <value>audio_rate</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(238, 348)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_vco_f</key>
+ <param>
+ <key>id</key>
+ <value>vco</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>audio_rate</value>
+ </param>
+ <param>
+ <key>sensitivity</key>
+ <value>audio_rate*2*math.pi</value>
+ </param>
+ <param>
+ <key>amplitude</key>
+ <value>0.9</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(427, 332)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blks2_cvsd_encode</key>
+ <param>
+ <key>id</key>
+ <value>enc</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>resample</key>
+ <value>resample</value>
+ </param>
+ <param>
+ <key>bw</key>
+ <value>bw</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(655, 340)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_packed_to_unpacked_xx</key>
+ <param>
+ <key>id</key>
+ <value>p2u</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>byte</value>
+ </param>
+ <param>
+ <key>bits_per_chunk</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>endianness</key>
+ <value>gr.GR_MSB_FIRST</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(648, 415)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>180</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_char_to_float</key>
+ <param>
+ <key>id</key>
+ <value>c2f</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(676, 483)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>audio_sink</key>
+ <param>
+ <key>id</key>
+ <value>audio_sink</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>audio_rate</value>
+ </param>
+ <param>
+ <key>device_name</key>
+ <value>plughw:0,0</value>
+ </param>
+ <param>
+ <key>ok_to_block</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1127, 340)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>audio_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>8000</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(251, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>resample</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>8</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(344, 11)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>bw</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>0.5</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(431, 11)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>notebook</key>
+ <param>
+ <key>id</key>
+ <value>displays</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.NB_TOP</value>
+ </param>
+ <param>
+ <key>labels</key>
+ <value>['Original','Encoded','Decoded']</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(12, 106)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_fftsink2</key>
+ <param>
+ <key>id</key>
+ <value>orig_fft</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Original Spectrum</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>audio_rate</value>
+ </param>
+ <param>
+ <key>baseband_freq</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>y_per_div</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>y_divs</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>ref_scale</key>
+ <value>2.0</value>
+ </param>
+ <param>
+ <key>fft_size</key>
+ <value>1024</value>
+ </param>
+ <param>
+ <key>fft_rate</key>
+ <value>30</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>0, 0, 1, 1</value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value>displays, 0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(415, 97)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>180</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_scopesink2</key>
+ <param>
+ <key>id</key>
+ <value>orig_scope</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Original Waveform</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>audio_rate</value>
+ </param>
+ <param>
+ <key>v_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>t_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>ac_couple</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>xy_mode</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>1, 0, 1, 1</value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value>displays, 0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(414, 425)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>180</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_fftsink2</key>
+ <param>
+ <key>id</key>
+ <value>enc_fft</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Encoded Spectrum</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>audio_rate*resample</value>
+ </param>
+ <param>
+ <key>baseband_freq</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>y_per_div</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>y_divs</key>
+ <value>8</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>ref_scale</key>
+ <value>2.0</value>
+ </param>
+ <param>
+ <key>fft_size</key>
+ <value>1024</value>
+ </param>
+ <param>
+ <key>fft_rate</key>
+ <value>30</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>1, 0, 1, 1</value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value>displays, 1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(610, 551)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>180</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_scopesink2</key>
+ <param>
+ <key>id</key>
+ <value>enc_scope</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Encoded Waveform</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>audio_rate*resample</value>
+ </param>
+ <param>
+ <key>v_scale</key>
+ <value>0.5</value>
+ </param>
+ <param>
+ <key>t_scale</key>
+ <value>20.0/(audio_rate*resample)</value>
+ </param>
+ <param>
+ <key>ac_couple</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>xy_mode</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>0, 0, 1, 1</value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value>displays, 1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(858, 591)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_fftsink2</key>
+ <param>
+ <key>id</key>
+ <value>dec_fft</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Decoded Spectrum</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>audio_rate</value>
+ </param>
+ <param>
+ <key>baseband_freq</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>y_per_div</key>
+ <value>5</value>
+ </param>
+ <param>
+ <key>y_divs</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>ref_scale</key>
+ <value>0.1</value>
+ </param>
+ <param>
+ <key>fft_size</key>
+ <value>1024</value>
+ </param>
+ <param>
+ <key>fft_rate</key>
+ <value>30</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>0, 0, 1, 1</value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value>displays, 2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(891, 98)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>180</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_scopesink2</key>
+ <param>
+ <key>id</key>
+ <value>dec_scope</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Decoded Waveform</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>audio_rate</value>
+ </param>
+ <param>
+ <key>v_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>t_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>ac_couple</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>xy_mode</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>1, 0, 1, 1</value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value>displays, 2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(889, 422)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>180</value>
+ </param>
+ </block>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>cvsd_sweep</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>CVSD Vocoder Test</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value></value>
+ </param>
+ <param>
+ <key>description</key>
+ <value></value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>run</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>vco</source_block_id>
+ <sink_block_id>orig_fft</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>tri_source</source_block_id>
+ <sink_block_id>throttle</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>throttle</source_block_id>
+ <sink_block_id>vco</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>vco</source_block_id>
+ <sink_block_id>enc</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>enc</source_block_id>
+ <sink_block_id>blks2_cvsd_decode_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>vco</source_block_id>
+ <sink_block_id>orig_scope</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blks2_cvsd_decode_0</source_block_id>
+ <sink_block_id>dec_fft</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blks2_cvsd_decode_0</source_block_id>
+ <sink_block_id>dec_scope</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blks2_cvsd_decode_0</source_block_id>
+ <sink_block_id>audio_sink</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>enc</source_block_id>
+ <sink_block_id>p2u</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>p2u</source_block_id>
+ <sink_block_id>c2f</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>c2f</source_block_id>
+ <sink_block_id>enc_fft</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>c2f</source_block_id>
+ <sink_block_id>enc_scope</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/audio/dial_tone.grc b/gnuradio-examples/grc/audio/dial_tone.grc
new file mode 100644
index 000000000..ac8cbef27
--- /dev/null
+++ b/gnuradio-examples/grc/audio/dial_tone.grc
@@ -0,0 +1,375 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Thu Jul 24 14:27:48 2008</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>dial_tone</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Dial Tone</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value>Example</value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>example flow graph</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_add_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_add_xx</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>3</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(513, 277)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>audio_sink</key>
+ <param>
+ <key>id</key>
+ <value>audio_sink</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>32000</value>
+ </param>
+ <param>
+ <key>device_name</key>
+ <value/>
+ </param>
+ <param>
+ <key>ok_to_block</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(699, 112)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_noise_source_x</key>
+ <param>
+ <key>id</key>
+ <value>gr_noise_source_x</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>noise_type</key>
+ <value>gr.GR_GAUSSIAN</value>
+ </param>
+ <param>
+ <key>amp</key>
+ <value>noise</value>
+ </param>
+ <param>
+ <key>seed</key>
+ <value>42</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(238, 380)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sig_source_x</key>
+ <param>
+ <key>id</key>
+ <value>gr_sig_source_x</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>waveform</key>
+ <value>gr.GR_COS_WAVE</value>
+ </param>
+ <param>
+ <key>freq</key>
+ <value>440</value>
+ </param>
+ <param>
+ <key>amp</key>
+ <value>ampl</value>
+ </param>
+ <param>
+ <key>offset</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(240, 208)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sig_source_x</key>
+ <param>
+ <key>id</key>
+ <value>gr_sig_source_x0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>waveform</key>
+ <value>gr.GR_COS_WAVE</value>
+ </param>
+ <param>
+ <key>freq</key>
+ <value>350</value>
+ </param>
+ <param>
+ <key>amp</key>
+ <value>ampl</value>
+ </param>
+ <param>
+ <key>offset</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(240, 38)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>ampl</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Volume</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>.4</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>.5</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>slider_type</key>
+ <value>horizontal</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>0, 0, 1, 2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(634, 413)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>noise</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Noise</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>.005</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>.2</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>slider_type</key>
+ <value>horizontal</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>1, 0, 1, 2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(443, 412)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>32000</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(11, 171)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>gr_sig_source_x0</source_block_id>
+ <sink_block_id>gr_add_xx</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_sig_source_x</source_block_id>
+ <sink_block_id>gr_add_xx</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_noise_source_x</source_block_id>
+ <sink_block_id>gr_add_xx</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>2</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_add_xx</source_block_id>
+ <sink_block_id>audio_sink</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/demod/mpsk_demod.grc b/gnuradio-examples/grc/demod/mpsk_demod.grc
new file mode 100644
index 000000000..08108dcba
--- /dev/null
+++ b/gnuradio-examples/grc/demod/mpsk_demod.grc
@@ -0,0 +1,586 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Mon Oct 5 18:34:52 2009</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>mpsk_demod</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>MPSK Demod Demo</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value></value>
+ </param>
+ <param>
+ <key>description</key>
+ <value></value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>run_options</key>
+ <value>prompt</value>
+ </param>
+ <param>
+ <key>run</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>32000</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 170)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>random_source_x</key>
+ <param>
+ <key>id</key>
+ <value>random_source_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>byte</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>2**8</value>
+ </param>
+ <param>
+ <key>num_samps</key>
+ <value>10000</value>
+ </param>
+ <param>
+ <key>repeat</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(155, 160)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blks2_dxpsk_mod</key>
+ <param>
+ <key>id</key>
+ <value>blks2_dxpsk_mod_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>dqpsk</value>
+ </param>
+ <param>
+ <key>samples_per_symbol</key>
+ <value>samps_per_sym</value>
+ </param>
+ <param>
+ <key>excess_bw</key>
+ <value>0.35</value>
+ </param>
+ <param>
+ <key>gray_code</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>verbose</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>log</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(391, 54)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_throttle</key>
+ <param>
+ <key>id</key>
+ <value>gr_throttle_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>samples_per_second</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(654, 142)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samps_per_sym</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>4</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(7, 89)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_channel_model</key>
+ <param>
+ <key>id</key>
+ <value>gr_channel_model_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>noise_voltage</key>
+ <value>noise</value>
+ </param>
+ <param>
+ <key>freq_offset</key>
+ <value>freq_off</value>
+ </param>
+ <param>
+ <key>epsilon</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>taps</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>seed</key>
+ <value>42</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(487, 282)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>noise</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Noise</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>.1</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(259, 353)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>freq_off</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Freq Offset</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>-.5</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>.5</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(126, 345)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>notebook</key>
+ <param>
+ <key>id</key>
+ <value>notebook</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.NB_TOP</value>
+ </param>
+ <param>
+ <key>labels</key>
+ <value>['Constellation', 'Spectrum']</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(520, 407)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_constellationsink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_constellationsink2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Constellation Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>frame_rate</key>
+ <value>5</value>
+ </param>
+ <param>
+ <key>const_size</key>
+ <value>2048</value>
+ </param>
+ <param>
+ <key>M</key>
+ <value>4</value>
+ </param>
+ <param>
+ <key>theta</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>alpha</key>
+ <value>0.005</value>
+ </param>
+ <param>
+ <key>fmax</key>
+ <value>0.06</value>
+ </param>
+ <param>
+ <key>mu</key>
+ <value>0.5</value>
+ </param>
+ <param>
+ <key>gain_mu</key>
+ <value>0.005</value>
+ </param>
+ <param>
+ <key>symbol_rate</key>
+ <value>samp_rate/4.</value>
+ </param>
+ <param>
+ <key>omega_limit</key>
+ <value>0.005</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value>notebook, 0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(824, 212)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_fftsink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_fftsink2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>FFT Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>baseband_freq</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>y_per_div</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>y_divs</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>50</value>
+ </param>
+ <param>
+ <key>ref_scale</key>
+ <value>2.0</value>
+ </param>
+ <param>
+ <key>fft_size</key>
+ <value>1024</value>
+ </param>
+ <param>
+ <key>fft_rate</key>
+ <value>30</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value>notebook, 1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(847, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>random_source_x_0</source_block_id>
+ <sink_block_id>blks2_dxpsk_mod_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_throttle_0</source_block_id>
+ <sink_block_id>wxgui_constellationsink2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_throttle_0</source_block_id>
+ <sink_block_id>wxgui_fftsink2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blks2_dxpsk_mod_0</source_block_id>
+ <sink_block_id>gr_channel_model_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_channel_model_0</source_block_id>
+ <sink_block_id>gr_throttle_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/demod/pam_timing.grc b/gnuradio-examples/grc/demod/pam_timing.grc
new file mode 100644
index 000000000..4e2a2f861
--- /dev/null
+++ b/gnuradio-examples/grc/demod/pam_timing.grc
@@ -0,0 +1,1424 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Mon Oct 12 17:54:59 2009</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>top_block</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value></value>
+ </param>
+ <param>
+ <key>author</key>
+ <value></value>
+ </param>
+ <param>
+ <key>description</key>
+ <value></value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>run_options</key>
+ <value>prompt</value>
+ </param>
+ <param>
+ <key>run</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_uchar_to_float</key>
+ <param>
+ <key>id</key>
+ <value>gr_uchar_to_float_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(217, 108)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_uchar_to_float</key>
+ <param>
+ <key>id</key>
+ <value>gr_uchar_to_float_0_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(216, 273)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>32000</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(128, 9)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>freq_offset</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Frequency Offset</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>-0.5</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>0.5</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(293, 684)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>rrctaps</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>firdes.root_raised_cosine(nfilts,1.0,1.0/(spb*nfilts), .35, int(11*spb*nfilts))</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(513, 679)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>random_source_x</key>
+ <param>
+ <key>id</key>
+ <value>random_source_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>byte</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>pam_amp</value>
+ </param>
+ <param>
+ <key>num_samps</key>
+ <value>10000</value>
+ </param>
+ <param>
+ <key>repeat</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(13, 80)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>random_source_x</key>
+ <param>
+ <key>id</key>
+ <value>random_source_x_0_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>byte</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>pam_amp</value>
+ </param>
+ <param>
+ <key>num_samps</key>
+ <value>10000</value>
+ </param>
+ <param>
+ <key>repeat</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(15, 245)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>const_source_x</key>
+ <param>
+ <key>id</key>
+ <value>const_source_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>const</key>
+ <value>-0.5*(pam_amp-1)</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(213, 197)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>const_source_x</key>
+ <param>
+ <key>id</key>
+ <value>const_source_x_0_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>const</key>
+ <value>-0.5*(pam_amp-1)</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(200, 360)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_scopesink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_scopesink2_0_0_0_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Scope Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>v_scale</key>
+ <value>1.25</value>
+ </param>
+ <param>
+ <key>t_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>ac_couple</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>xy_mode</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value>notebook_0,2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1111, 767)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_scopesink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_scopesink2_0_0_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Scope Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>v_scale</key>
+ <value>9</value>
+ </param>
+ <param>
+ <key>t_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>ac_couple</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>xy_mode</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value>notebook_0,1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1112, 881)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_channel_model</key>
+ <param>
+ <key>id</key>
+ <value>gr_channel_model_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>noise_voltage</key>
+ <value>noise_amp</value>
+ </param>
+ <param>
+ <key>freq_offset</key>
+ <value>freq_offset</value>
+ </param>
+ <param>
+ <key>epsilon</key>
+ <value>interpratio</value>
+ </param>
+ <param>
+ <key>taps</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>seed</key>
+ <value>42</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(59, 543)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_throttle</key>
+ <param>
+ <key>id</key>
+ <value>gr_throttle_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>samples_per_second</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(290, 575)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>notebook</key>
+ <param>
+ <key>id</key>
+ <value>notebook_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.NB_TOP</value>
+ </param>
+ <param>
+ <key>labels</key>
+ <value>['error', 'phase', 'freq', 'Resampled Signal']</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(729, 769)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_scopesink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_scopesink2_0_0_1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Error</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>v_scale</key>
+ <value>.5</value>
+ </param>
+ <param>
+ <key>t_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>ac_couple</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>xy_mode</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value>notebook_0,3</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1115, 358)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_add_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_add_xx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(440, 167)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_add_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_add_xx_0_1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(430, 330)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_float_to_complex</key>
+ <param>
+ <key>id</key>
+ <value>gr_float_to_complex_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(590, 184)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_scopesink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_scopesink2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Scope Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>v_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>t_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>ac_couple</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>xy_mode</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1116, 500)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>nfilts</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>32</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(435, 686)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_pfb_clock_sync_ccf</key>
+ <param>
+ <key>id</key>
+ <value>gr_pfb_clock_sync_ccf_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>sps</key>
+ <value>spb</value>
+ </param>
+ <param>
+ <key>alpha</key>
+ <value>alpha</value>
+ </param>
+ <param>
+ <key>beta</key>
+ <value>beta</value>
+ </param>
+ <param>
+ <key>taps</key>
+ <value>rrctaps</value>
+ </param>
+ <param>
+ <key>filter_size</key>
+ <value>nfilts</value>
+ </param>
+ <param>
+ <key>init_phase</key>
+ <value>16</value>
+ </param>
+ <param>
+ <key>max_dev</key>
+ <value>1.5</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(512, 527)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>noise_amp</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Channel Noise</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(168, 684)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>interpratio</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Timing Offset</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>1.00</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0.99</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>1.01</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(40, 684)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>180</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>spb_gen</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>4</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(119, 841)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>beta</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Timing Beta</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0.0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>0.1</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(668, 5)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>180</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>alpha</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Timing Alpha</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(552, 4)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_scopesink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_scopesink2_0_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Error</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>v_scale</key>
+ <value>3</value>
+ </param>
+ <param>
+ <key>t_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>ac_couple</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>xy_mode</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>notebook</key>
+ <value>notebook_0,0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1110, 651)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>root_raised_cosine_filter</key>
+ <param>
+ <key>id</key>
+ <value>root_raised_cosine_filter_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>interp_fir_filter_ccf</value>
+ </param>
+ <param>
+ <key>decim</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>interp</key>
+ <value>spb_gen</value>
+ </param>
+ <param>
+ <key>gain</key>
+ <value>2*spb_gen</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>sym_rate</key>
+ <value>1./spb_gen</value>
+ </param>
+ <param>
+ <key>alpha</key>
+ <value>0.35</value>
+ </param>
+ <param>
+ <key>ntaps</key>
+ <value>11*spb_gen</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(834, 157)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blks2_pfb_arb_resampler_ccf</key>
+ <param>
+ <key>id</key>
+ <value>blks2_pfb_arb_resampler_ccf_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>rate</key>
+ <value>float(spb)/float(spb_gen)</value>
+ </param>
+ <param>
+ <key>taps</key>
+ <value>firdes.low_pass(128, 128, 0.45, 0.1)</value>
+ </param>
+ <param>
+ <key>size</key>
+ <value>128</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(617, 374)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_multiply_const_vxx</key>
+ <param>
+ <key>id</key>
+ <value>gr_multiply_const_vxx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>const</key>
+ <value>sig_amp</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1096, 197)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>pam_amp</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(223, 9)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>spb</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>4.1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(32, 842)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>sig_amp</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(315, 9)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>gr_pfb_clock_sync_ccf_0</source_block_id>
+ <sink_block_id>wxgui_scopesink2_0_0</sink_block_id>
+ <source_key>1</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_pfb_clock_sync_ccf_0</source_block_id>
+ <sink_block_id>wxgui_scopesink2_0_0_0</sink_block_id>
+ <source_key>3</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_pfb_clock_sync_ccf_0</source_block_id>
+ <sink_block_id>wxgui_scopesink2_0_0_0_0</sink_block_id>
+ <source_key>2</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>random_source_x_0</source_block_id>
+ <sink_block_id>gr_uchar_to_float_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_uchar_to_float_0</source_block_id>
+ <sink_block_id>gr_add_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>const_source_x_0</source_block_id>
+ <sink_block_id>gr_add_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_uchar_to_float_0_0</source_block_id>
+ <sink_block_id>gr_add_xx_0_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>const_source_x_0_0</source_block_id>
+ <sink_block_id>gr_add_xx_0_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>random_source_x_0_0</source_block_id>
+ <sink_block_id>gr_uchar_to_float_0_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blks2_pfb_arb_resampler_ccf_0</source_block_id>
+ <sink_block_id>gr_channel_model_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blks2_pfb_arb_resampler_ccf_0</source_block_id>
+ <sink_block_id>wxgui_scopesink2_0_0_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_channel_model_0</source_block_id>
+ <sink_block_id>gr_throttle_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_throttle_0</source_block_id>
+ <sink_block_id>gr_pfb_clock_sync_ccf_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_pfb_clock_sync_ccf_0</source_block_id>
+ <sink_block_id>wxgui_scopesink2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_add_xx_0</source_block_id>
+ <sink_block_id>gr_float_to_complex_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_add_xx_0_1</source_block_id>
+ <sink_block_id>gr_float_to_complex_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_float_to_complex_0</source_block_id>
+ <sink_block_id>root_raised_cosine_filter_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>root_raised_cosine_filter_0</source_block_id>
+ <sink_block_id>gr_multiply_const_vxx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_multiply_const_vxx_0</source_block_id>
+ <sink_block_id>blks2_pfb_arb_resampler_ccf_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/simple/ber_simulation.grc b/gnuradio-examples/grc/simple/ber_simulation.grc
new file mode 100644
index 000000000..618add29c
--- /dev/null
+++ b/gnuradio-examples/grc/simple/ber_simulation.grc
@@ -0,0 +1,564 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Thu Mar 19 11:08:59 2009</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>ber_sim</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>BER Simulation</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value>Example</value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>Adjust the noise and constellation... see what happens!</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(16, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_noise_source_x</key>
+ <param>
+ <key>id</key>
+ <value>gr_noise_source_x</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>noise_type</key>
+ <value>gr.GR_GAUSSIAN</value>
+ </param>
+ <param>
+ <key>amp</key>
+ <value>noise</value>
+ </param>
+ <param>
+ <key>seed</key>
+ <value>42</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(235, 379)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_chunks_to_symbols_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_chunks_to_symbols_xx</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>in_type</key>
+ <value>byte</value>
+ </param>
+ <param>
+ <key>out_type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>symbol_table</key>
+ <value>const</value>
+ </param>
+ <param>
+ <key>dimension</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(360, 237)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_numbersink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_numbersink2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>BER</value>
+ </param>
+ <param>
+ <key>units</key>
+ <value>%</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>base_value</key>
+ <value>0.0</value>
+ </param>
+ <param>
+ <key>min_value</key>
+ <value>0.0</value>
+ </param>
+ <param>
+ <key>max_value</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>factor</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>decimal_places</key>
+ <value>4</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>number_rate</key>
+ <value>15</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>show_gauge</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>1, 0, 1, 1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1062, 11)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_throttle</key>
+ <param>
+ <key>id</key>
+ <value>gr_throttle</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>byte</value>
+ </param>
+ <param>
+ <key>samples_per_second</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(397, 27)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blks2_error_rate</key>
+ <param>
+ <key>id</key>
+ <value>blks2_error_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>'BER'</value>
+ </param>
+ <param>
+ <key>win_size</key>
+ <value>1000000</value>
+ </param>
+ <param>
+ <key>bits_per_symbol</key>
+ <value>int(math.log(len(const))/math.log(2))</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(670, 41)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_constellation_decoder_cb</key>
+ <param>
+ <key>id</key>
+ <value>gr_constellation_decoder_cb</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>sym_position</key>
+ <value>const</value>
+ </param>
+ <param>
+ <key>sym_value_out</key>
+ <value>range(len(const))</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(708, 224)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>random_source_x</key>
+ <param>
+ <key>id</key>
+ <value>random_source_x</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>byte</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>len(const)</value>
+ </param>
+ <param>
+ <key>num_samps</key>
+ <value>1000000</value>
+ </param>
+ <param>
+ <key>repeat</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(15, 244)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>noise</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>.25</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(18, 386)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>const</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>1+1j, 1-1j, -1-1j, -1+1j</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(16, 461)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>50e3</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(20, 168)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>import</key>
+ <param>
+ <key>id</key>
+ <value>import</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>import</key>
+ <value>import math</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(138, 168)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_add_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_add_xx</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(652, 395)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_scopesink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_scopesink2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>"Constellation: "+str(const)</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>v_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>t_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>ac_couple</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>xy_mode</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>2, 0, 1, 1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(828, 368)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>blks2_error_rate</source_block_id>
+ <sink_block_id>wxgui_numbersink2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_throttle</source_block_id>
+ <sink_block_id>blks2_error_rate</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_constellation_decoder_cb</source_block_id>
+ <sink_block_id>blks2_error_rate</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_add_xx</source_block_id>
+ <sink_block_id>gr_constellation_decoder_cb</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_chunks_to_symbols_xx</source_block_id>
+ <sink_block_id>gr_add_xx</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_noise_source_x</source_block_id>
+ <sink_block_id>gr_add_xx</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>random_source_x</source_block_id>
+ <sink_block_id>gr_throttle</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>random_source_x</source_block_id>
+ <sink_block_id>gr_chunks_to_symbols_xx</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_add_xx</source_block_id>
+ <sink_block_id>wxgui_scopesink2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/simple/dpsk_loopback.grc b/gnuradio-examples/grc/simple/dpsk_loopback.grc
new file mode 100644
index 000000000..6a507c98d
--- /dev/null
+++ b/gnuradio-examples/grc/simple/dpsk_loopback.grc
@@ -0,0 +1,450 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Tue Mar 17 12:53:37 2009</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>dpsk_loopback</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>DPSK Loopback</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value>Example</value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>gnuradio flow graph</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blks2_dxpsk_mod</key>
+ <param>
+ <key>id</key>
+ <value>blks2_dxpsk_mod_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>dbpsk</value>
+ </param>
+ <param>
+ <key>samples_per_symbol</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>excess_bw</key>
+ <value>0.35</value>
+ </param>
+ <param>
+ <key>gray_code</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(426, 295)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>10000</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 170)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>freq</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Frequency (Hz)</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>500</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>samp_rate/2</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>slider_length</key>
+ <value>200</value>
+ </param>
+ <param>
+ <key>slider_type</key>
+ <value>horizontal</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(12, 257)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blks2_packet_encoder</key>
+ <param>
+ <key>id</key>
+ <value>blks2_packet_encoder_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>samples_per_symbol</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>bits_per_symbol</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>access_code</key>
+ <value></value>
+ </param>
+ <param>
+ <key>pad_for_usrp</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>payload_length</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(216, 260)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_throttle</key>
+ <param>
+ <key>id</key>
+ <value>gr_throttle_0_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>samples_per_second</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(225, 174)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sig_source_x</key>
+ <param>
+ <key>id</key>
+ <value>gr_sig_source_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>waveform</key>
+ <value>gr.GR_COS_WAVE</value>
+ </param>
+ <param>
+ <key>freq</key>
+ <value>freq</value>
+ </param>
+ <param>
+ <key>amp</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>offset</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(203, 8)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blks2_packet_decoder</key>
+ <param>
+ <key>id</key>
+ <value>blks2_packet_decoder_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>access_code</key>
+ <value></value>
+ </param>
+ <param>
+ <key>threshold</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(551, 65)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_scopesink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_scopesink2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Scope Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>frame_decim</key>
+ <value>15</value>
+ </param>
+ <param>
+ <key>v_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>t_scale</key>
+ <value>1./freq</value>
+ </param>
+ <param>
+ <key>marker</key>
+ <value>set_format_line</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(769, 12)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blks2_dxpsk_demod</key>
+ <param>
+ <key>id</key>
+ <value>blks2_dxpsk_demod_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>dbpsk</value>
+ </param>
+ <param>
+ <key>samples_per_symbol</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>excess_bw</key>
+ <value>0.35</value>
+ </param>
+ <param>
+ <key>costas_alpha</key>
+ <value>0.175</value>
+ </param>
+ <param>
+ <key>gain_mu</key>
+ <value>0.175</value>
+ </param>
+ <param>
+ <key>mu</key>
+ <value>0.5</value>
+ </param>
+ <param>
+ <key>omega_relative_limit</key>
+ <value>0.005</value>
+ </param>
+ <param>
+ <key>gray_code</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(691, 219)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>blks2_dxpsk_mod_0</source_block_id>
+ <sink_block_id>blks2_dxpsk_demod_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blks2_dxpsk_demod_0</source_block_id>
+ <sink_block_id>blks2_packet_decoder_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blks2_packet_encoder_0</source_block_id>
+ <sink_block_id>blks2_dxpsk_mod_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_sig_source_x_0</source_block_id>
+ <sink_block_id>gr_throttle_0_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_throttle_0_0</source_block_id>
+ <sink_block_id>blks2_packet_encoder_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blks2_packet_decoder_0</source_block_id>
+ <sink_block_id>wxgui_scopesink2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/simple/var_sink_taps.grc b/gnuradio-examples/grc/simple/var_sink_taps.grc
new file mode 100644
index 000000000..07207850e
--- /dev/null
+++ b/gnuradio-examples/grc/simple/var_sink_taps.grc
@@ -0,0 +1,488 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Tue May 19 16:45:51 2009</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>var_sink_taps</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Variable Sink + Taps</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value>Example</value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>gnuradio flow graph</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_noise_source_x</key>
+ <param>
+ <key>id</key>
+ <value>gr_noise_source_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>noise_type</key>
+ <value>gr.GR_GAUSSIAN</value>
+ </param>
+ <param>
+ <key>amp</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>seed</key>
+ <value>42</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(619, 36)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_fir_filter_xxx</key>
+ <param>
+ <key>id</key>
+ <value>gr_fir_filter_xxx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>ccc</value>
+ </param>
+ <param>
+ <key>decim</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>taps</key>
+ <value>dest_taps</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(831, 47)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_throttle</key>
+ <param>
+ <key>id</key>
+ <value>gr_throttle_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>samples_per_second</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(999, 198)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>270</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_fftsink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_fftsink2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>FFT Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>baseband_freq</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>y_per_div</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>y_divs</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>50</value>
+ </param>
+ <param>
+ <key>fft_size</key>
+ <value>1024</value>
+ </param>
+ <param>
+ <key>fft_rate</key>
+ <value>30</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(629, 184)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>180</value>
+ </param>
+ </block>
+ <block>
+ <key>import</key>
+ <param>
+ <key>id</key>
+ <value>import_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>import</key>
+ <value>from gnuradio.gr import firdes</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(330, 120)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>dest_taps</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>[0]</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(836, 223)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>32000</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(831, 130)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>source_taps</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>firdes.low_pass(1, samp_rate, 4000, 2000)</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(397, 191)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>taps_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(268, 189)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_vector_source_x</key>
+ <param>
+ <key>id</key>
+ <value>gr_vector_source_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>vector</key>
+ <value>source_taps</value>
+ </param>
+ <param>
+ <key>repeat</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>len(source_taps)</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(205, 33)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>note</key>
+ <param>
+ <key>id</key>
+ <value>note_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>note</key>
+ <value>Pass the FIR taps via a variable sink.</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(14, 141)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_throttle</key>
+ <param>
+ <key>id</key>
+ <value>gr_throttle</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>samples_per_second</key>
+ <value>taps_rate</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>len(source_taps)</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(440, 41)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blks2_variable_sink_x</key>
+ <param>
+ <key>id</key>
+ <value>blks2_variable_sink_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>variable</key>
+ <value>dest_taps</value>
+ </param>
+ <param>
+ <key>decim</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>len(source_taps)</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(305, 283)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>180</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>gr_noise_source_x_0</source_block_id>
+ <sink_block_id>gr_fir_filter_xxx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_fir_filter_xxx_0</source_block_id>
+ <sink_block_id>gr_throttle_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_throttle_0</source_block_id>
+ <sink_block_id>wxgui_fftsink2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_vector_source_x_0</source_block_id>
+ <sink_block_id>gr_throttle</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_throttle</source_block_id>
+ <sink_block_id>blks2_variable_sink_x_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/simple/variable_config.grc b/gnuradio-examples/grc/simple/variable_config.grc
new file mode 100644
index 000000000..95c287cce
--- /dev/null
+++ b/gnuradio-examples/grc/simple/variable_config.grc
@@ -0,0 +1,329 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Thu Jun 25 10:56:04 2009</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>variable_config_demo</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Variable Config Block Demonstration</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value>Example</value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>Save/Load freq from a config file.</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>autostart</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>32000</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 170)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_config</key>
+ <param>
+ <key>id</key>
+ <value>freq_init</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>real</value>
+ </param>
+ <param>
+ <key>config_file</key>
+ <value>config.conf</value>
+ </param>
+ <param>
+ <key>section</key>
+ <value>main</value>
+ </param>
+ <param>
+ <key>option</key>
+ <value>freq</value>
+ </param>
+ <param>
+ <key>writeback</key>
+ <value>freq</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(255, 17)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>freq</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Frequency (Hz)</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>freq_init</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>-samp_rate/2</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>samp_rate/2</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(429, 24)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_throttle</key>
+ <param>
+ <key>id</key>
+ <value>gr_throttle_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>samples_per_second</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(392, 233)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sig_source_x</key>
+ <param>
+ <key>id</key>
+ <value>gr_sig_source_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>waveform</key>
+ <value>gr.GR_COS_WAVE</value>
+ </param>
+ <param>
+ <key>freq</key>
+ <value>freq</value>
+ </param>
+ <param>
+ <key>amp</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>offset</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(148, 233)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_fftsink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_fftsink2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>FFT Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>baseband_freq</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>y_per_div</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>y_divs</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>50</value>
+ </param>
+ <param>
+ <key>fft_size</key>
+ <value>1024</value>
+ </param>
+ <param>
+ <key>fft_rate</key>
+ <value>30</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(671, 233)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>gr_sig_source_x_0</source_block_id>
+ <sink_block_id>gr_throttle_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_throttle_0</source_block_id>
+ <sink_block_id>wxgui_fftsink2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/trellis/interference_cancellation.grc b/gnuradio-examples/grc/trellis/interference_cancellation.grc
new file mode 100644
index 000000000..e93babd78
--- /dev/null
+++ b/gnuradio-examples/grc/trellis/interference_cancellation.grc
@@ -0,0 +1,2072 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Thu Mar 19 11:22:40 2009</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>int_cancellation</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Superposition Coding</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value>AA</value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>gnuradio flow graph</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>2048, 2048</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>alpha</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>P1/P</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>0.6</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>slider_length</key>
+ <value>200</value>
+ </param>
+ <param>
+ <key>slider_type</key>
+ <value>horizontal</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(243, 11)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>snr_db</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>P/sigma^2 (dB)</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>16</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>20</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>slider_length</key>
+ <value>200</value>
+ </param>
+ <param>
+ <key>slider_type</key>
+ <value>horizontal</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(447, 14)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>noisevar</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>10**(-snr_db/10)</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(637, 13)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>random_source_x</key>
+ <param>
+ <key>id</key>
+ <value>random_source_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>num_samps</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>repeat</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(21, 170)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_chunks_to_symbols_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_chunks_to_symbols_xx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>in_type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>out_type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>symbol_table</key>
+ <value>1,1j,-1j,-1</value>
+ </param>
+ <param>
+ <key>dimension</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(665, 187)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_multiply_const_vxx</key>
+ <param>
+ <key>id</key>
+ <value>gr_multiply_const_vxx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>const</key>
+ <value>alpha**0.5</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(988, 196)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>random_source_x</key>
+ <param>
+ <key>id</key>
+ <value>random_source_x_1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>num_samps</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>repeat</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(25, 291)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_chunks_to_symbols_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_chunks_to_symbols_xx_1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>in_type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>out_type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>symbol_table</key>
+ <value>1,1j,-1j,-1</value>
+ </param>
+ <param>
+ <key>dimension</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(660, 311)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_multiply_const_vxx</key>
+ <param>
+ <key>id</key>
+ <value>gr_multiply_const_vxx_1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>const</key>
+ <value>(1-alpha)**0.5</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(994, 319)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_add_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_add_xx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1224, 244)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_noise_source_x</key>
+ <param>
+ <key>id</key>
+ <value>gr_noise_source_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>noise_type</key>
+ <value>gr.GR_GAUSSIAN</value>
+ </param>
+ <param>
+ <key>amp</key>
+ <value>noisevar</value>
+ </param>
+ <param>
+ <key>seed</key>
+ <value>42</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1146, 369)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sub_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_sub_xx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(536, 529)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_multiply_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_multiply_xx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(771, 525)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_short_to_float</key>
+ <param>
+ <key>id</key>
+ <value>gr_short_to_float_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(994, 545)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sub_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_sub_xx_3</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(535, 792)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_multiply_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_multiply_xx_1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(785, 779)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_short_to_float</key>
+ <param>
+ <key>id</key>
+ <value>gr_short_to_float_2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1005, 798)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_chunks_to_symbols_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_chunks_to_symbols_xx_2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>in_type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>out_type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>symbol_table</key>
+ <value>1,1j,-1j,-1</value>
+ </param>
+ <param>
+ <key>dimension</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(405, 998)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_multiply_const_vxx</key>
+ <param>
+ <key>id</key>
+ <value>gr_multiply_const_vxx_2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>const</key>
+ <value>alpha**0.5</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(710, 1008)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sub_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_sub_xx_2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(944, 978)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sub_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_sub_xx_1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(540, 1141)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_multiply_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_multiply_xx_2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(796, 1136)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_short_to_float</key>
+ <param>
+ <key>id</key>
+ <value>gr_short_to_float_1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1009, 1156)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_chunks_to_symbols_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_chunks_to_symbols_xx_2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>in_type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>out_type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>symbol_table</key>
+ <value>1,1j,-1j,-1</value>
+ </param>
+ <param>
+ <key>dimension</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(420, 1368)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_multiply_const_vxx</key>
+ <param>
+ <key>id</key>
+ <value>gr_multiply_const_vxx_2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>const</key>
+ <value>(1-alpha)**0.5</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(733, 1374)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sub_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_sub_xx_2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(975, 1342)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sub_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_sub_xx_1_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(559, 1536)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_multiply_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_multiply_xx_2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>short</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(771, 1530)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_short_to_float</key>
+ <param>
+ <key>id</key>
+ <value>gr_short_to_float_1_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1010, 1551)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_numbersink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_numbersink2_2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>BER 2 (raw)</value>
+ </param>
+ <param>
+ <key>units</key>
+ <value>BER</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>R</value>
+ </param>
+ <param>
+ <key>base_value</key>
+ <value>0.0</value>
+ </param>
+ <param>
+ <key>min_value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max_value</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>factor</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>decimal_places</key>
+ <value>6</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>number_rate</key>
+ <value>15</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0.001</value>
+ </param>
+ <param>
+ <key>show_gauge</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>0,1,1,1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1260, 659)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_numbersink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_numbersink2_3</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>BER 2 (after cancelling user 1)</value>
+ </param>
+ <param>
+ <key>units</key>
+ <value>BER</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>R</value>
+ </param>
+ <param>
+ <key>base_value</key>
+ <value>0.0</value>
+ </param>
+ <param>
+ <key>min_value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max_value</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>factor</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>decimal_places</key>
+ <value>6</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>number_rate</key>
+ <value>15</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0.001</value>
+ </param>
+ <param>
+ <key>show_gauge</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>1,1,1,1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1262, 1020)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_numbersink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_numbersink2_3_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>BER 1 (after cancelling user 2)</value>
+ </param>
+ <param>
+ <key>units</key>
+ <value>BER</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>R</value>
+ </param>
+ <param>
+ <key>base_value</key>
+ <value>0.0</value>
+ </param>
+ <param>
+ <key>min_value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max_value</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>factor</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>decimal_places</key>
+ <value>6</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>number_rate</key>
+ <value>15</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0.001</value>
+ </param>
+ <param>
+ <key>show_gauge</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>1,0,1,1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1269, 1417)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>R</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>10e3</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(748, 12)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>trellis_encoder_xx</key>
+ <param>
+ <key>id</key>
+ <value>trellis_encoder_xx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>ss</value>
+ </param>
+ <param>
+ <key>fsm_args</key>
+ <value>prefix+"gr-trellis/src/examples/fsm_files/awgn1o2_16.fsm"</value>
+ </param>
+ <param>
+ <key>init_state</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(334, 190)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>trellis_encoder_xx</key>
+ <param>
+ <key>id</key>
+ <value>trellis_encoder_xx_1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>ss</value>
+ </param>
+ <param>
+ <key>fsm_args</key>
+ <value>prefix+"gr-trellis/src/examples/fsm_files/awgn1o2_16.fsm"</value>
+ </param>
+ <param>
+ <key>init_state</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(336, 311)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>trellis_viterbi_combined_xx</key>
+ <param>
+ <key>id</key>
+ <value>trellis_viterbi_combined_xx_1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>c</value>
+ </param>
+ <param>
+ <key>out_type</key>
+ <value>s</value>
+ </param>
+ <param>
+ <key>fsm_args</key>
+ <value>prefix+"gr-trellis/src/examples/fsm_files/awgn1o2_16.fsm"</value>
+ </param>
+ <param>
+ <key>block_size</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>init_state</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>final_state</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>dim</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>table</key>
+ <value>alpha**0.5*1,alpha**0.5*1j,alpha**0.5*(-1j),alpha**0.5*(-1)</value>
+ </param>
+ <param>
+ <key>metric_type</key>
+ <value>trellis.TRELLIS_EUCLIDEAN</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(79, 501)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>trellis_viterbi_combined_xx</key>
+ <param>
+ <key>id</key>
+ <value>trellis_viterbi_combined_xx_2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>c</value>
+ </param>
+ <param>
+ <key>out_type</key>
+ <value>s</value>
+ </param>
+ <param>
+ <key>fsm_args</key>
+ <value>prefix+"gr-trellis/src/examples/fsm_files/awgn1o2_16.fsm"</value>
+ </param>
+ <param>
+ <key>block_size</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>init_state</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>final_state</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>dim</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>table</key>
+ <value>(1-alpha)**0.5*1,(1-alpha)**0.5*1j,(1-alpha)**0.5*(-1j),(1-alpha)**0.5*(-1)</value>
+ </param>
+ <param>
+ <key>metric_type</key>
+ <value>trellis.TRELLIS_EUCLIDEAN</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(82, 766)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>trellis_encoder_xx</key>
+ <param>
+ <key>id</key>
+ <value>trellis_encoder_xx_2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>ss</value>
+ </param>
+ <param>
+ <key>fsm_args</key>
+ <value>prefix+"gr-trellis/src/examples/fsm_files/awgn1o2_16.fsm"</value>
+ </param>
+ <param>
+ <key>init_state</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(89, 998)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>trellis_viterbi_combined_xx</key>
+ <param>
+ <key>id</key>
+ <value>trellis_viterbi_combined_xx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>c</value>
+ </param>
+ <param>
+ <key>out_type</key>
+ <value>s</value>
+ </param>
+ <param>
+ <key>fsm_args</key>
+ <value>prefix+"gr-trellis/src/examples/fsm_files/awgn1o2_16.fsm"</value>
+ </param>
+ <param>
+ <key>block_size</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>init_state</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>final_state</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>dim</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>table</key>
+ <value>(1-alpha)**0.5*1,(1-alpha)**0.5*1j,(1-alpha)**0.5*(-1j),(1-alpha)**0.5*(-1)</value>
+ </param>
+ <param>
+ <key>metric_type</key>
+ <value>trellis.TRELLIS_EUCLIDEAN</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(83, 1111)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>trellis_encoder_xx</key>
+ <param>
+ <key>id</key>
+ <value>trellis_encoder_xx_2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>ss</value>
+ </param>
+ <param>
+ <key>fsm_args</key>
+ <value>prefix+"gr-trellis/src/examples/fsm_files/awgn1o2_16.fsm"</value>
+ </param>
+ <param>
+ <key>init_state</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(105, 1367)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>trellis_viterbi_combined_xx</key>
+ <param>
+ <key>id</key>
+ <value>trellis_viterbi_combined_xx_0_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>c</value>
+ </param>
+ <param>
+ <key>out_type</key>
+ <value>s</value>
+ </param>
+ <param>
+ <key>fsm_args</key>
+ <value>prefix+"gr-trellis/src/examples/fsm_files/awgn1o2_16.fsm"</value>
+ </param>
+ <param>
+ <key>block_size</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>init_state</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>final_state</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>dim</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>table</key>
+ <value>alpha**0.5*1,alpha**0.5*1j,alpha**0.5*(-1j),alpha**0.5*(-1)</value>
+ </param>
+ <param>
+ <key>metric_type</key>
+ <value>trellis.TRELLIS_EUCLIDEAN</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(75, 1495)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>prefix</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>"../../../"</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(871, 14)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_add_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_add_xx_1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1400, 262)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_numbersink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_numbersink2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>BER 1 (raw)</value>
+ </param>
+ <param>
+ <key>units</key>
+ <value>BER</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>R</value>
+ </param>
+ <param>
+ <key>base_value</key>
+ <value>0.0</value>
+ </param>
+ <param>
+ <key>min_value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max_value</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>factor</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>decimal_places</key>
+ <value>6</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>number_rate</key>
+ <value>15</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0.001</value>
+ </param>
+ <param>
+ <key>show_gauge</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>0,0,1,1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1267, 410)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_scopesink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_scopesink2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Scope Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>R</value>
+ </param>
+ <param>
+ <key>v_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>t_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>ac_couple</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>xy_mode</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1533, 149)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>random_source_x_1</source_block_id>
+ <sink_block_id>trellis_encoder_xx_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>trellis_encoder_xx_0</source_block_id>
+ <sink_block_id>gr_chunks_to_symbols_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>trellis_encoder_xx_1</source_block_id>
+ <sink_block_id>gr_chunks_to_symbols_xx_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_chunks_to_symbols_xx_0</source_block_id>
+ <sink_block_id>gr_multiply_const_vxx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_multiply_const_vxx_0</source_block_id>
+ <sink_block_id>gr_add_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_add_xx_0</source_block_id>
+ <sink_block_id>gr_add_xx_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_noise_source_x_0</source_block_id>
+ <sink_block_id>gr_add_xx_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_chunks_to_symbols_xx_1</source_block_id>
+ <sink_block_id>gr_multiply_const_vxx_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_multiply_const_vxx_1</source_block_id>
+ <sink_block_id>gr_add_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_sub_xx_0</source_block_id>
+ <sink_block_id>gr_multiply_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_sub_xx_0</source_block_id>
+ <sink_block_id>gr_multiply_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_multiply_xx_0</source_block_id>
+ <sink_block_id>gr_short_to_float_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_short_to_float_0</source_block_id>
+ <sink_block_id>wxgui_numbersink2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_multiply_xx_2</source_block_id>
+ <sink_block_id>gr_short_to_float_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>random_source_x_0</source_block_id>
+ <sink_block_id>trellis_encoder_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_add_xx_1</source_block_id>
+ <sink_block_id>trellis_viterbi_combined_xx_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>random_source_x_0</source_block_id>
+ <sink_block_id>gr_sub_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>trellis_viterbi_combined_xx_1</source_block_id>
+ <sink_block_id>gr_sub_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>trellis_viterbi_combined_xx_0</source_block_id>
+ <sink_block_id>gr_sub_xx_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>random_source_x_1</source_block_id>
+ <sink_block_id>gr_sub_xx_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_sub_xx_1</source_block_id>
+ <sink_block_id>gr_multiply_xx_2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_sub_xx_1</source_block_id>
+ <sink_block_id>gr_multiply_xx_2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_sub_xx_2</source_block_id>
+ <sink_block_id>trellis_viterbi_combined_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_add_xx_1</source_block_id>
+ <sink_block_id>gr_sub_xx_2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>trellis_encoder_xx_2</source_block_id>
+ <sink_block_id>gr_chunks_to_symbols_xx_2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_chunks_to_symbols_xx_2</source_block_id>
+ <sink_block_id>gr_multiply_const_vxx_2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_multiply_const_vxx_2</source_block_id>
+ <sink_block_id>gr_sub_xx_2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>trellis_viterbi_combined_xx_1</source_block_id>
+ <sink_block_id>trellis_encoder_xx_2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_multiply_xx_1</source_block_id>
+ <sink_block_id>gr_short_to_float_2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_short_to_float_2</source_block_id>
+ <sink_block_id>wxgui_numbersink2_2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>trellis_viterbi_combined_xx_2</source_block_id>
+ <sink_block_id>gr_sub_xx_3</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_sub_xx_3</source_block_id>
+ <sink_block_id>gr_multiply_xx_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_sub_xx_3</source_block_id>
+ <sink_block_id>gr_multiply_xx_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_add_xx_1</source_block_id>
+ <sink_block_id>trellis_viterbi_combined_xx_2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>random_source_x_1</source_block_id>
+ <sink_block_id>gr_sub_xx_3</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_short_to_float_1</source_block_id>
+ <sink_block_id>wxgui_numbersink2_3</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>trellis_encoder_xx_2_0</source_block_id>
+ <sink_block_id>gr_chunks_to_symbols_xx_2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_chunks_to_symbols_xx_2_0</source_block_id>
+ <sink_block_id>gr_multiply_const_vxx_2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>trellis_viterbi_combined_xx_2</source_block_id>
+ <sink_block_id>trellis_encoder_xx_2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_multiply_xx_2_0</source_block_id>
+ <sink_block_id>gr_short_to_float_1_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>trellis_viterbi_combined_xx_0_0</source_block_id>
+ <sink_block_id>gr_sub_xx_1_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_sub_xx_1_0</source_block_id>
+ <sink_block_id>gr_multiply_xx_2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_sub_xx_1_0</source_block_id>
+ <sink_block_id>gr_multiply_xx_2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_sub_xx_2_0</source_block_id>
+ <sink_block_id>trellis_viterbi_combined_xx_0_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_short_to_float_1_0</source_block_id>
+ <sink_block_id>wxgui_numbersink2_3_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_add_xx_1</source_block_id>
+ <sink_block_id>gr_sub_xx_2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>random_source_x_0</source_block_id>
+ <sink_block_id>gr_sub_xx_1_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_multiply_const_vxx_2_0</source_block_id>
+ <sink_block_id>gr_sub_xx_2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_add_xx_1</source_block_id>
+ <sink_block_id>wxgui_scopesink2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/trellis/readme.txt b/gnuradio-examples/grc/trellis/readme.txt
new file mode 100644
index 000000000..d620fd628
--- /dev/null
+++ b/gnuradio-examples/grc/trellis/readme.txt
@@ -0,0 +1,16 @@
+This is an example of using gr-trellis in grc.
+
+Two users are transmitting simultaneously using convolutionally encoded QPSK, each with power P1=alpha*P and P2=(1-alpha)*P.
+The combined signal is observed in noise and four different receivers are considered:
+1) A viterbi decoder decoding user 1 assuming user 2 is noise
+2) A viterbi decoder decoding user 2 assuming user 1 is noise
+3) A viterbi decoder decoding user 1 first
+ and then reencoding this signal, subtracting it from the observation
+ and then running a Viterbi decoder decoding user 2
+4) A viterbi decoder decoding user 2 first
+ and then reencoding this signal, subtracting it from the observation
+ and then running a Viterbi decoder decoding user 1
+
+You can change the signal to noise ratio P/sigma^2 and the allocation of power to the two users, alpha.
+
+Enjoy.
diff --git a/gnuradio-examples/grc/usrp/usrp2_const_wave.grc b/gnuradio-examples/grc/usrp/usrp2_const_wave.grc
new file mode 100644
index 000000000..fdbd7c1f3
--- /dev/null
+++ b/gnuradio-examples/grc/usrp/usrp2_const_wave.grc
@@ -0,0 +1,252 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Wed Apr 15 11:22:56 2009</timestamp>
+ <block>
+ <key>const_source_x</key>
+ <param>
+ <key>id</key>
+ <value>const_source_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>const</key>
+ <value>ampl</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(284, 154)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>usrp2_sink_xxxx</key>
+ <param>
+ <key>id</key>
+ <value>usrp2_sink_xxxx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>interface</key>
+ <value></value>
+ </param>
+ <param>
+ <key>mac_addr</key>
+ <value></value>
+ </param>
+ <param>
+ <key>interpolation</key>
+ <value>interp</value>
+ </param>
+ <param>
+ <key>frequency</key>
+ <value>tun_freq</value>
+ </param>
+ <param>
+ <key>gain</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(493, 106)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>interp</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>16</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(16, 255)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>tun_freq</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>USRP2 Freq (Hz)</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>2.45e9</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>2.4e9</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>2.5e9</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>slider_length</key>
+ <value>200</value>
+ </param>
+ <param>
+ <key>slider_type</key>
+ <value>horizontal</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(30, 376)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>ampl</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Amplitude</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>.1</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>slider_length</key>
+ <value>200</value>
+ </param>
+ <param>
+ <key>slider_type</key>
+ <value>horizontal</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(204, 376)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>usrp2_const_wave</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>USRP2 Constant Wave</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value>Example</value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>Tune USRP2</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>const_source_x_0</source_block_id>
+ <sink_block_id>usrp2_sink_xxxx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/usrp/usrp2_dpsk_mod.grc b/gnuradio-examples/grc/usrp/usrp2_dpsk_mod.grc
new file mode 100644
index 000000000..e9f9b41ea
--- /dev/null
+++ b/gnuradio-examples/grc/usrp/usrp2_dpsk_mod.grc
@@ -0,0 +1,693 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Wed Apr 15 17:31:00 2009</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>usrp2_dpsk_mod</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>USRP2 DPSK Modulation</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value>Example</value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>Generate a DPSK signal</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>100e6/interp</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(52, 166)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>usrp2_sink_xxxx</key>
+ <param>
+ <key>id</key>
+ <value>usrp2_sink_xxxx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>interface</key>
+ <value></value>
+ </param>
+ <param>
+ <key>mac_addr</key>
+ <value></value>
+ </param>
+ <param>
+ <key>interpolation</key>
+ <value>interp</value>
+ </param>
+ <param>
+ <key>frequency</key>
+ <value>tun_freq</value>
+ </param>
+ <param>
+ <key>gain</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1059, 56)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_multiply_const_vxx</key>
+ <param>
+ <key>id</key>
+ <value>gr_multiply_const_vxx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>const</key>
+ <value>ampl</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(679, 58)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blks2_dxpsk_mod</key>
+ <param>
+ <key>id</key>
+ <value>blks2_dxpsk_mod_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>dqpsk</value>
+ </param>
+ <param>
+ <key>samples_per_symbol</key>
+ <value>samps_per_sym</value>
+ </param>
+ <param>
+ <key>excess_bw</key>
+ <value>0.35</value>
+ </param>
+ <param>
+ <key>gray_code</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(468, 55)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>interp</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(31, 256)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samps_per_sym</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>8</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(126, 250)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>random_source_x</key>
+ <param>
+ <key>id</key>
+ <value>random_source_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>byte</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>256</value>
+ </param>
+ <param>
+ <key>num_samps</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>repeat</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(255, 39)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>ampl</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Amplitude</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>.1</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(246, 372)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>rx_freq_off</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>RX Freq Offset (Hz)</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>-20e3</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>-50e3</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>+50e3</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(247, 508)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>tun_freq</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>USRP2 Freq (Hz)</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>2.45e9</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>2.4e9</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>2.5e9</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(49, 341)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_constellationsink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_constellationsink2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Constellation Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>frame_rate</key>
+ <value>5</value>
+ </param>
+ <param>
+ <key>const_size</key>
+ <value>2048</value>
+ </param>
+ <param>
+ <key>M</key>
+ <value>4</value>
+ </param>
+ <param>
+ <key>theta</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>alpha</key>
+ <value>0.005</value>
+ </param>
+ <param>
+ <key>fmax</key>
+ <value>0.06</value>
+ </param>
+ <param>
+ <key>mu</key>
+ <value>0.5</value>
+ </param>
+ <param>
+ <key>gain_mu</key>
+ <value>0.005</value>
+ </param>
+ <param>
+ <key>symbol_rate</key>
+ <value>samp_rate/samps_per_sym</value>
+ </param>
+ <param>
+ <key>omega_limit</key>
+ <value>0.005</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(920, 202)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_fftsink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_fftsink2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>FFT Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>baseband_freq</key>
+ <value>tun_freq</value>
+ </param>
+ <param>
+ <key>y_per_div</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>fft_size</key>
+ <value>1024</value>
+ </param>
+ <param>
+ <key>fft_rate</key>
+ <value>30</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(691, 155)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_scopesink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_scopesink2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Scope Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>v_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>t_scale</key>
+ <value>1e-6</value>
+ </param>
+ <param>
+ <key>ac_couple</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>xy_mode</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(515, 272)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>usrp2_source_xxxx</key>
+ <param>
+ <key>id</key>
+ <value>usrp2_source_xxxx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>interface</key>
+ <value>eth1</value>
+ </param>
+ <param>
+ <key>mac_addr</key>
+ <value></value>
+ </param>
+ <param>
+ <key>decimation</key>
+ <value>interp</value>
+ </param>
+ <param>
+ <key>frequency</key>
+ <value>tun_freq + rx_freq_off</value>
+ </param>
+ <param>
+ <key>gain</key>
+ <value>30</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(270, 200)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>random_source_x_0</source_block_id>
+ <sink_block_id>blks2_dxpsk_mod_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blks2_dxpsk_mod_0</source_block_id>
+ <sink_block_id>gr_multiply_const_vxx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_multiply_const_vxx_0</source_block_id>
+ <sink_block_id>usrp2_sink_xxxx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>usrp2_source_xxxx_0</source_block_id>
+ <sink_block_id>wxgui_constellationsink2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>usrp2_source_xxxx_0</source_block_id>
+ <sink_block_id>wxgui_scopesink2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>usrp2_source_xxxx_0</source_block_id>
+ <sink_block_id>wxgui_fftsink2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/usrp/usrp2_fft.grc b/gnuradio-examples/grc/usrp/usrp2_fft.grc
new file mode 100644
index 000000000..134bd4614
--- /dev/null
+++ b/gnuradio-examples/grc/usrp/usrp2_fft.grc
@@ -0,0 +1,264 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Wed Apr 15 17:30:20 2009</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>usrp2_fft</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>USRP2 FFT Plotter</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value>Example</value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>FFT waveform plot</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>100e6/decim</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 170)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>decim</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>16</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(24, 267)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>tun_freq</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>USRP2 Freq (Hz)</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>2.45e9</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>2.4e9</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>2.5e9</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(32, 365)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_fftsink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_fftsink2_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>FFT Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>baseband_freq</key>
+ <value>tun_freq</value>
+ </param>
+ <param>
+ <key>y_per_div</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>fft_size</key>
+ <value>1024</value>
+ </param>
+ <param>
+ <key>fft_rate</key>
+ <value>30</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(466, 100)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>usrp2_source_xxxx</key>
+ <param>
+ <key>id</key>
+ <value>usrp2_source_xxxx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>interface</key>
+ <value></value>
+ </param>
+ <param>
+ <key>mac_addr</key>
+ <value></value>
+ </param>
+ <param>
+ <key>decimation</key>
+ <value>decim</value>
+ </param>
+ <param>
+ <key>frequency</key>
+ <value>tun_freq</value>
+ </param>
+ <param>
+ <key>gain</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(211, 200)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>usrp2_source_xxxx_0</source_block_id>
+ <sink_block_id>wxgui_fftsink2_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/usrp/usrp_two_tone_loopback.grc b/gnuradio-examples/grc/usrp/usrp_two_tone_loopback.grc
new file mode 100644
index 000000000..3df977044
--- /dev/null
+++ b/gnuradio-examples/grc/usrp/usrp_two_tone_loopback.grc
@@ -0,0 +1,749 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Fri Apr 17 18:23:35 2009</timestamp>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>64e6/200</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(9, 166)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>tun_freq</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>int(100e6)</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(116, 166)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sig_source_x</key>
+ <param>
+ <key>id</key>
+ <value>gr_sig_source_x</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>waveform</key>
+ <value>gr.GR_COS_WAVE</value>
+ </param>
+ <param>
+ <key>freq</key>
+ <value>tone1</value>
+ </param>
+ <param>
+ <key>amp</key>
+ <value>tone_ampl</value>
+ </param>
+ <param>
+ <key>offset</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(258, 20)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sig_source_x</key>
+ <param>
+ <key>id</key>
+ <value>gr_sig_source_x0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>waveform</key>
+ <value>gr.GR_COS_WAVE</value>
+ </param>
+ <param>
+ <key>freq</key>
+ <value>tone2</value>
+ </param>
+ <param>
+ <key>amp</key>
+ <value>tone_ampl</value>
+ </param>
+ <param>
+ <key>offset</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(255, 179)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_add_xx</key>
+ <param>
+ <key>id</key>
+ <value>gr_add_xx</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>3</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(528, 78)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>parameter</key>
+ <param>
+ <key>id</key>
+ <value>tx_side</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value></value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>A</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>string</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(688, 384)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>usrp_simple_sink_x</key>
+ <param>
+ <key>id</key>
+ <value>usrp_simple_sink_x</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>format</key>
+ <value></value>
+ </param>
+ <param>
+ <key>which</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>interpolation</key>
+ <value>400</value>
+ </param>
+ <param>
+ <key>frequency</key>
+ <value>tun_freq</value>
+ </param>
+ <param>
+ <key>gain</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>side</key>
+ <value>tx_side</value>
+ </param>
+ <param>
+ <key>transmit</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(835, 5)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>usrp_simple_source_x</key>
+ <param>
+ <key>id</key>
+ <value>usrp_simple_source_x</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>format</key>
+ <value></value>
+ </param>
+ <param>
+ <key>which</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>decimation</key>
+ <value>200</value>
+ </param>
+ <param>
+ <key>frequency</key>
+ <value>tun_freq</value>
+ </param>
+ <param>
+ <key>gain</key>
+ <value>20</value>
+ </param>
+ <param>
+ <key>side</key>
+ <value>rx_side</value>
+ </param>
+ <param>
+ <key>rx_ant</key>
+ <value>rx_ant</value>
+ </param>
+ <param>
+ <key>hb_filters</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(479, 224)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>parameter</key>
+ <param>
+ <key>id</key>
+ <value>rx_ant</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value></value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>RXA</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>string</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(802, 384)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_fftsink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_fftsink2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>FFT Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>baseband_freq</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>y_per_div</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>fft_size</key>
+ <value>512*2</value>
+ </param>
+ <param>
+ <key>fft_rate</key>
+ <value>15</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>1, 2, 2, 4</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(746, 133)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>parameter</key>
+ <param>
+ <key>id</key>
+ <value>rx_side</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value></value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>A</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>string</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(568, 382)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_noise_source_x</key>
+ <param>
+ <key>id</key>
+ <value>gr_noise_source_x</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>noise_type</key>
+ <value>gr.GR_GAUSSIAN</value>
+ </param>
+ <param>
+ <key>amp</key>
+ <value>noise_ampl</value>
+ </param>
+ <param>
+ <key>seed</key>
+ <value>42</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(276, 312)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>noise_ampl</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Noise Ampl</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>2000</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>5000</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_VERTICAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>1, 1, 2, 1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(20, 243)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>tone_ampl</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Tone Ampl</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>5000</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>10e3</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_VERTICAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>1, 0, 2, 1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(28, 437)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>tone1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Tone 1</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>50e3</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>-samp_rate/2</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>samp_rate/2</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>0, 0, 1, 4</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(190, 436)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>tone2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Tone 2</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>75e3</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>-samp_rate/2</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>samp_rate/2</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>0, 4, 1, 4</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(367, 439)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>usrp_two_tone_loopback</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>USRP Loopback - 2 Tone</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value>Example</value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>Loopback test with basic rx and basic tx</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>gr_sig_source_x</source_block_id>
+ <sink_block_id>gr_add_xx</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_sig_source_x0</source_block_id>
+ <sink_block_id>gr_add_xx</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_noise_source_x</source_block_id>
+ <sink_block_id>gr_add_xx</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>2</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>usrp_simple_source_x</source_block_id>
+ <sink_block_id>wxgui_fftsink2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_add_xx</source_block_id>
+ <sink_block_id>usrp_simple_sink_x</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/usrp/usrp_wbfm_receive.grc b/gnuradio-examples/grc/usrp/usrp_wbfm_receive.grc
new file mode 100644
index 000000000..8f53475ab
--- /dev/null
+++ b/gnuradio-examples/grc/usrp/usrp_wbfm_receive.grc
@@ -0,0 +1,466 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Fri Apr 17 19:06:07 2009</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>usrp_wbfm_receive</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>USRP WBFM Receive</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value>Example</value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>WBFM Receive with Basic RX or TV RX</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>decim</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>200</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(14, 173)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>volume</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Volume</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>1, 0, 1, 4</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(991, 40)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>usrp_simple_source_x</key>
+ <param>
+ <key>id</key>
+ <value>usrp_simple_source_x</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>format</key>
+ <value></value>
+ </param>
+ <param>
+ <key>which</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>decimation</key>
+ <value>decim</value>
+ </param>
+ <param>
+ <key>frequency</key>
+ <value>(freq+fine)*1e6</value>
+ </param>
+ <param>
+ <key>gain</key>
+ <value>20</value>
+ </param>
+ <param>
+ <key>side</key>
+ <value>A</value>
+ </param>
+ <param>
+ <key>rx_ant</key>
+ <value>None</value>
+ </param>
+ <param>
+ <key>hb_filters</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(277, 29)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_fftsink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_fftsink2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>FFT Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>64e6/decim</value>
+ </param>
+ <param>
+ <key>baseband_freq</key>
+ <value>(freq+fine)*1e6</value>
+ </param>
+ <param>
+ <key>y_per_div</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>50</value>
+ </param>
+ <param>
+ <key>fft_size</key>
+ <value>512</value>
+ </param>
+ <param>
+ <key>fft_rate</key>
+ <value>15</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>2, 0, 2, 4</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(512, 191)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>freq</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Frequency (MHz)</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>87.5</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>108.0</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>0, 0, 1, 2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(104, 243)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>fine</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Fine Freq (MHz)</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>-.1</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>.1</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>style</key>
+ <value>wx.SL_HORIZONTAL</value>
+ </param>
+ <param>
+ <key>converver</key>
+ <value>float_converter</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>0, 2, 1, 2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(275, 246)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blks2_wfm_rcv</key>
+ <param>
+ <key>id</key>
+ <value>blks2_wfm_rcv</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>quad_rate</key>
+ <value>64e6/decim</value>
+ </param>
+ <param>
+ <key>audio_decimation</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(510, 37)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_multiply_const_vxx</key>
+ <param>
+ <key>id</key>
+ <value>gr_multiply_const_vxx</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>const</key>
+ <value>volume</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(764, 55)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>audio_sink</key>
+ <param>
+ <key>id</key>
+ <value>audio_sink</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>32000</value>
+ </param>
+ <param>
+ <key>device_name</key>
+ <value></value>
+ </param>
+ <param>
+ <key>ok_to_block</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(703, 241)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>180</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>usrp_simple_source_x</source_block_id>
+ <sink_block_id>blks2_wfm_rcv</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>usrp_simple_source_x</source_block_id>
+ <sink_block_id>wxgui_fftsink2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blks2_wfm_rcv</source_block_id>
+ <sink_block_id>gr_multiply_const_vxx</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_multiply_const_vxx</source_block_id>
+ <sink_block_id>audio_sink</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gnuradio-examples/grc/xmlrpc/readme.txt b/gnuradio-examples/grc/xmlrpc/readme.txt
new file mode 100644
index 000000000..c1f87c1cb
--- /dev/null
+++ b/gnuradio-examples/grc/xmlrpc/readme.txt
@@ -0,0 +1,18 @@
+##################################################
+# XMLRPC example
+##################################################
+
+XMLRPC allows software to make remote function calls over http.
+In the case of GRC, one can use XMLRPC to modify variables in a running flow graph.
+See http://www.xmlrpc.com/
+
+--- Server Example ---
+Place an "XMLRPC Server" block inside of any flow graph.
+The server will provide set functions for every variable in the flow graph.
+If a variable is called "freq", the server will provide a function set_freq(new_freq).
+Run the server example and experiment with the example client script.
+
+-- Client Example --
+The "XMLRPC Client" block will give a variable control over one remove function.
+In the example client, there is one client block and gui control per variable.
+This technique can be used to remotely control a flow graph, perhaps running on a non-gui machine.
diff --git a/gnuradio-examples/grc/xmlrpc/xmlrpc_client.grc b/gnuradio-examples/grc/xmlrpc/xmlrpc_client.grc
new file mode 100644
index 000000000..3bb4e7ed3
--- /dev/null
+++ b/gnuradio-examples/grc/xmlrpc/xmlrpc_client.grc
@@ -0,0 +1,312 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Thu Jul 24 14:27:44 2008</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>client_block</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>XMLRPC Client</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value>Example</value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>example flow graph</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>xmlrpc_client</key>
+ <param>
+ <key>id</key>
+ <value>xmlrpc_client0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>addr</key>
+ <value>localhost</value>
+ </param>
+ <param>
+ <key>port</key>
+ <value>1234</value>
+ </param>
+ <param>
+ <key>callback</key>
+ <value>set_ampl</value>
+ </param>
+ <param>
+ <key>variable</key>
+ <value>ampl</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(409, 35)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>xmlrpc_client</key>
+ <param>
+ <key>id</key>
+ <value>xmlrpc_client</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>addr</key>
+ <value>localhost</value>
+ </param>
+ <param>
+ <key>port</key>
+ <value>1234</value>
+ </param>
+ <param>
+ <key>callback</key>
+ <value>set_freq</value>
+ </param>
+ <param>
+ <key>variable</key>
+ <value>freq</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(222, 34)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>freq</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Frequency (Hz)</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>5000</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>slider_type</key>
+ <value>horizontal</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>0, 0, 1, 2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(207, 162)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_slider</key>
+ <param>
+ <key>id</key>
+ <value>ampl</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Amplitude</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>min</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>num_steps</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>slider_type</key>
+ <value>horizontal</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>1, 0, 1, 2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(397, 167)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_chooser</key>
+ <param>
+ <key>id</key>
+ <value>offset</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Offset</value>
+ </param>
+ <param>
+ <key>value_index</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>choices</key>
+ <value>[-1, 0, 1]</value>
+ </param>
+ <param>
+ <key>labels</key>
+ <value>["neg", "zero", "pos"]</value>
+ </param>
+ <param>
+ <key>chooser_type</key>
+ <value>radio_buttons_horizontal</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>2, 0, 1, 2</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(596, 177)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>xmlrpc_client</key>
+ <param>
+ <key>id</key>
+ <value>xmlrpc_client1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>addr</key>
+ <value>localhost</value>
+ </param>
+ <param>
+ <key>port</key>
+ <value>1234</value>
+ </param>
+ <param>
+ <key>callback</key>
+ <value>set_offset</value>
+ </param>
+ <param>
+ <key>variable</key>
+ <value>offset*ampl</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(608, 39)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>32000</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(13, 172)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+</flow_graph> \ No newline at end of file
diff --git a/gnuradio-examples/grc/xmlrpc/xmlrpc_client_script.py b/gnuradio-examples/grc/xmlrpc/xmlrpc_client_script.py
new file mode 100644
index 000000000..956fa07fb
--- /dev/null
+++ b/gnuradio-examples/grc/xmlrpc/xmlrpc_client_script.py
@@ -0,0 +1,23 @@
+#!/usr/bin/env python
+
+import time
+import random
+import xmlrpclib
+
+#create server object
+s = xmlrpclib.Server("http://localhost:1234")
+
+#randomly change parameters of the sinusoid
+for i in range(10):
+ #generate random values
+ new_freq = random.uniform(0, 5000)
+ new_ampl = random.uniform(0, 2)
+ new_offset = random.uniform(-1, 1)
+ #set new values
+ time.sleep(1)
+ s.set_freq(new_freq)
+ time.sleep(1)
+ s.set_ampl(new_ampl)
+ time.sleep(1)
+ s.set_offset(new_offset)
+
diff --git a/gnuradio-examples/grc/xmlrpc/xmlrpc_server.grc b/gnuradio-examples/grc/xmlrpc/xmlrpc_server.grc
new file mode 100644
index 000000000..dc539ef1b
--- /dev/null
+++ b/gnuradio-examples/grc/xmlrpc/xmlrpc_server.grc
@@ -0,0 +1,384 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+ <timestamp>Thu Jul 24 14:27:42 2008</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>server_block</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>XMLRPC Server</value>
+ </param>
+ <param>
+ <key>author</key>
+ <value>Example</value>
+ </param>
+ <param>
+ <key>description</key>
+ <value>example flow graph</value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>1280, 1024</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>wx_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_sig_source_x</key>
+ <param>
+ <key>id</key>
+ <value>gr_sig_source_x</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>waveform</key>
+ <value>gr.GR_COS_WAVE</value>
+ </param>
+ <param>
+ <key>freq</key>
+ <value>freq</value>
+ </param>
+ <param>
+ <key>amp</key>
+ <value>ampl</value>
+ </param>
+ <param>
+ <key>offset</key>
+ <value>offset</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(162, 200)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>offset</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(12, 390)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>xmlrpc_server</key>
+ <param>
+ <key>id</key>
+ <value>xmlrpc_server</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>addr</key>
+ <value>localhost</value>
+ </param>
+ <param>
+ <key>port</key>
+ <value>1234</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(395, 240)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>gr_throttle</key>
+ <param>
+ <key>id</key>
+ <value>gr_throttle</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>samples_per_second</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(386, 93)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_scopesink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_scopesink2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>Scope Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>frame_decim</key>
+ <value>15</value>
+ </param>
+ <param>
+ <key>v_scale</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>t_scale</key>
+ <value>.001</value>
+ </param>
+ <param>
+ <key>marker</key>
+ <value>set_format_line</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>0, 0, 2, 4</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(623, 28)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>wxgui_fftsink2</key>
+ <param>
+ <key>id</key>
+ <value>wxgui_fftsink2</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value>FFT Plot</value>
+ </param>
+ <param>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>baseband_freq</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>y_per_div</key>
+ <value>10</value>
+ </param>
+ <param>
+ <key>y_divs</key>
+ <value>8</value>
+ </param>
+ <param>
+ <key>ref_level</key>
+ <value>50</value>
+ </param>
+ <param>
+ <key>fft_size</key>
+ <value>512</value>
+ </param>
+ <param>
+ <key>fft_rate</key>
+ <value>15</value>
+ </param>
+ <param>
+ <key>avg_alpha</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>average</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>peak_hold</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>grid_pos</key>
+ <value>2, 0, 2, 4</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(630, 233)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>32000</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(11, 160)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>freq</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>1000</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(11, 237)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>ampl</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(13, 315)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>gr_sig_source_x</source_block_id>
+ <sink_block_id>gr_throttle</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_throttle</source_block_id>
+ <sink_block_id>wxgui_scopesink2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>gr_throttle</source_block_id>
+ <sink_block_id>wxgui_fftsink2</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph> \ No newline at end of file