Merge branch 'sync' of git@gnuradio.org:trondeau into master

This merge adds polyphase clock recovery, implements new PAM demodulators that use it, and also moves GRC examples to gnuradio-examples component. See merge commit diff for updated files post merge. * 'sync' of git@gnuradio.org:trondeau: (54 commits) Reverting dqpsk to be mpsk_receiver based and not change its behavior. Fixing initialization of timing gains. Alpha should be < 1, and beta should be << 1. This splits the rate into a fractional an integer value, which allows the loop to adjust the fractional rate while the integer rate keeps the increments moving properly. Allows the max rate deviation to be independent of the integer rate. Scaling of the differential taps also allows alpha and beta to operate independent of the rate when fractional samples per symbol are used. Slightly more tolerant to large signal values, but they still should be close to +/-1. Fixing compiler warnings. Adding dqpsk2 block to makefile for installation. Adding DQPSK version that uses the PFB timing sync block (dqpsk2). Minor fixes for logging. Fixing import of UI file. Temporary working dbpsk2 example until we match everything. Working DBPSK implementation with new PFB clock recovery block. The feedforward AGC wasn't playing nicely, the frequency aquistion range was increased to swing half the sample rate in either direction, and the number of filter phases to use was increased to 32. A bit of code cleanup. Starting to rework QT app to control new PFB clock recovery alg. Making old dbpsk work again to compare against new version. Adding new DBPSK block with new PFB clock recovery alg. Revert "More additions to PAM timing simulation." More additions to PAM timing simulation. Using 2-PAM by default. Cleaning up GRC PAM timing example and adding ability to do M-ary PAM. Cleaning up constructor. Moving filter number decision to start work function. ...
author: Johnathan Corgan 2009-10-12 18:46:56 -0700
committer: Johnathan Corgan 2009-10-12 18:46:56 -0700
commit: 4df83569c130c1f4fe2aba3e1b5dd1419272f22f (patch)
tree: f64ccf30880228ab639ff06c971603e214b6303f /grc
parent: 83ddffdaa968c5131228346b5f3f2ca123b759c7 (diff)
parent: 3eeb2720664ec7cb67e60d4f8a01b933ddba0143 (diff)
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28 files changed, 79 insertions, 8444 deletions
diff --git a/grc/Makefile.am b/grc/Makefile.am
index 28408c4a8..30b955a1e 100644
--- a/grc/Makefile.am
+++ b/grc/Makefile.am
@@ -25,7 +25,6 @@ if PYTHON
 SUBDIRS = \
 	base \
 	blocks \
-	examples \
 	grc_gnuradio \
 	gui \
 	python \
diff --git a/grc/blocks/Makefile.am b/grc/blocks/Makefile.am
index 7d0876b2f..61c003803 100644
--- a/grc/blocks/Makefile.am
+++ b/grc/blocks/Makefile.am
@@ -145,6 +145,7 @@ dist_ourdata_DATA = \
 	gr_packed_to_unpacked_xx.xml \
 	gr_peak_detector2_fb.xml \
 	gr_peak_detector_xb.xml \
+	gr_pfb_clock_sync.xml \
 	gr_phase_modulator_fc.xml \
 	gr_pll_carriertracking_cc.xml \
 	gr_pll_freqdet_cf.xml \
diff --git a/grc/blocks/block_tree.xml b/grc/blocks/block_tree.xml
index 444d922ed..187ca196a 100644
--- a/grc/blocks/block_tree.xml
+++ b/grc/blocks/block_tree.xml
@@ -126,6 +126,7 @@
 	<cat>
 		<name>Synchronizers</name>
 		<block>gr_clock_recovery_mm_xx</block>
+		<block>gr_pfb_clock_sync_ccf</block>
 
 		<block>gr_costas_loop_cc</block>
 		<block>gr_dd_mpsk_sync_cc</block>
@@ -169,7 +170,7 @@
 		<block>band_pass_filter</block>
 		<block>band_reject_filter</block>
 		<block>root_raised_cosine_filter</block>
-		<!-- Filters that take taps as aruments -->
+		<!-- Filters that take taps as arguments -->
 		<block>gr_fir_filter_xxx</block>
 		<block>gr_interp_fir_filter_xxx</block>
 		<block>gr_fft_filter_xxx</block>
@@ -180,7 +181,7 @@
 		<!-- Filter banks -->
 		<block>blks2_synthesis_filterbank</block>
 		<block>blks2_analysis_filterbank</block>
-		<!-- Polyphase filers -->
+		<!-- Polyphase filters -->
 		<block>blks2_pfb_arb_resampler_ccf</block>
 		<!-- Other filters -->
 		<block>gr_single_pole_iir_filter_xx</block>
diff --git a/grc/blocks/gr_pfb_clock_sync.xml b/grc/blocks/gr_pfb_clock_sync.xml
new file mode 100644
index 000000000..9cb909acd
--- /dev/null
+++ b/grc/blocks/gr_pfb_clock_sync.xml
@@ -0,0 +1,75 @@
+<?xml version="1.0"?>
+<!--
+###################################################
+## Polyphase Filter based Clock Sync
+###################################################
+ -->
+<block>
+	<name>Polyphase Clock Sync</name>
+	<key>gr_pfb_clock_sync_ccf</key>
+	<import>from gnuradio import gr</import>
+	<make>gr.pfb_clock_sync_ccf($sps, $alpha, $taps, $filter_size, $init_phase, $max_dev)
+self.$(id).set_beta($beta)</make>
+	<callback>set_taps($taps)</callback>
+	<callback>set_alpha($alpha)</callback>
+	<callback>set_beta($beta)</callback>
+
+	<param>
+		<name>Samples/Symbol</name>
+		<key>sps</key>
+		<type>real</type>
+	</param>
+	<param>
+		<name>Alpha</name>
+		<key>alpha</key>
+		<type>real</type>
+	</param>
+	<param>
+		<name>Beta</name>
+		<key>beta</key>
+		<type>real</type>
+	</param>
+	<param>
+		<name>Taps</name>
+		<key>taps</key>
+		<type>real_vector</type>
+	</param>
+	<param>
+		<name>Filter Size</name>
+		<key>filter_size</key>
+		<type>int</type>
+	</param>
+	<param>
+		<name>Initial Phase</name>
+		<key>init_phase</key>
+		<type>real</type>
+	</param>
+	<param>
+		<name>Maximum Rate Deviation</name>
+		<key>max_dev</key>
+		<type>real</type>
+	</param>
+	<sink>
+		<name>in</name>
+		<type>complex</type>
+	</sink>
+	<source>
+		<name>out</name>
+		<type>complex</type>
+	</source>
+	<source>
+		<name>err</name>
+		<type>float</type>
+		<optional>1</optional>
+	</source>
+	<source>
+		<name>rate</name>
+		<type>float</type>
+		<optional>1</optional>
+	</source>
+	<source>
+		<name>phase</name>
+		<type>float</type>
+		<optional>1</optional>
+	</source>
+</block>
diff --git a/grc/examples/.gitignore b/grc/examples/.gitignore
deleted file mode 100644
index b336cc7ce..000000000
--- a/grc/examples/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-/Makefile
-/Makefile.in
diff --git a/grc/examples/Makefile.am b/grc/examples/Makefile.am
deleted file mode 100644
index 78321ce0a..000000000
--- a/grc/examples/Makefile.am
+++ /dev/null
@@ -1,56 +0,0 @@
-#
-# 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
-
-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/grc/examples/audio/.gitignore b/grc/examples/audio/.gitignore
deleted file mode 100644
index b336cc7ce..000000000
--- a/grc/examples/audio/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-/Makefile
-/Makefile.in
diff --git a/grc/examples/audio/cvsd_sweep.grc b/grc/examples/audio/cvsd_sweep.grc
deleted file mode 100644
index 8d0b385ce..000000000
--- a/grc/examples/audio/cvsd_sweep.grc
+++ /dev/null
@@ -1,918 +0,0 @@
-<?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/grc/examples/audio/dial_tone.grc b/grc/examples/audio/dial_tone.grc
deleted file mode 100644
index ac8cbef27..000000000
--- a/grc/examples/audio/dial_tone.grc
+++ /dev/null
@@ -1,375 +0,0 @@
-<?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/grc/examples/simple/.gitignore b/grc/examples/simple/.gitignore
deleted file mode 100644
index b336cc7ce..000000000
--- a/grc/examples/simple/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-/Makefile
-/Makefile.in
diff --git a/grc/examples/simple/ber_simulation.grc b/grc/examples/simple/ber_simulation.grc
deleted file mode 100644
index 618add29c..000000000
--- a/grc/examples/simple/ber_simulation.grc
+++ /dev/null
@@ -1,564 +0,0 @@
-<?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/grc/examples/simple/dpsk_loopback.grc b/grc/examples/simple/dpsk_loopback.grc
deleted file mode 100644
index 6a507c98d..000000000
--- a/grc/examples/simple/dpsk_loopback.grc
+++ /dev/null
@@ -1,450 +0,0 @@
-<?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/grc/examples/simple/var_sink_taps.grc b/grc/examples/simple/var_sink_taps.grc
deleted file mode 100644
index 07207850e..000000000
--- a/grc/examples/simple/var_sink_taps.grc
+++ /dev/null
@@ -1,488 +0,0 @@
-<?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/grc/examples/simple/variable_config.grc b/grc/examples/simple/variable_config.grc
deleted file mode 100644
index 95c287cce..000000000
--- a/grc/examples/simple/variable_config.grc
+++ /dev/null
@@ -1,329 +0,0 @@
-<?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/grc/examples/trellis/.gitignore b/grc/examples/trellis/.gitignore
deleted file mode 100644
index b336cc7ce..000000000
--- a/grc/examples/trellis/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-/Makefile
-/Makefile.in
diff --git a/grc/examples/trellis/interference_cancellation.grc b/grc/examples/trellis/interference_cancellation.grc
deleted file mode 100644
index e93babd78..000000000
--- a/grc/examples/trellis/interference_cancellation.grc
+++ /dev/null
@@ -1,2072 +0,0 @@
-<?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>
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-    <param>
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-  </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/grc/examples/trellis/readme.txt b/grc/examples/trellis/readme.txt
deleted file mode 100644
index d620fd628..000000000
--- a/grc/examples/trellis/readme.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-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/grc/examples/usrp/.gitignore b/grc/examples/usrp/.gitignore
deleted file mode 100644
index b336cc7ce..000000000
--- a/grc/examples/usrp/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-/Makefile
-/Makefile.in
diff --git a/grc/examples/usrp/usrp2_const_wave.grc b/grc/examples/usrp/usrp2_const_wave.grc
deleted file mode 100644
index fdbd7c1f3..000000000
--- a/grc/examples/usrp/usrp2_const_wave.grc
+++ /dev/null
@@ -1,252 +0,0 @@
-<?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/grc/examples/usrp/usrp2_dpsk_mod.grc b/grc/examples/usrp/usrp2_dpsk_mod.grc
deleted file mode 100644
index e9f9b41ea..000000000
--- a/grc/examples/usrp/usrp2_dpsk_mod.grc
+++ /dev/null
@@ -1,693 +0,0 @@
-<?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/grc/examples/usrp/usrp2_fft.grc b/grc/examples/usrp/usrp2_fft.grc
deleted file mode 100644
index 134bd4614..000000000
--- a/grc/examples/usrp/usrp2_fft.grc
+++ /dev/null
@@ -1,264 +0,0 @@
-<?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/grc/examples/usrp/usrp_two_tone_loopback.grc b/grc/examples/usrp/usrp_two_tone_loopback.grc
deleted file mode 100644
index 3df977044..000000000
--- a/grc/examples/usrp/usrp_two_tone_loopback.grc
+++ /dev/null
@@ -1,749 +0,0 @@
-<?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/grc/examples/usrp/usrp_wbfm_receive.grc b/grc/examples/usrp/usrp_wbfm_receive.grc
deleted file mode 100644
index 8f53475ab..000000000
--- a/grc/examples/usrp/usrp_wbfm_receive.grc
+++ /dev/null
@@ -1,466 +0,0 @@
-<?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/grc/examples/xmlrpc/.gitignore b/grc/examples/xmlrpc/.gitignore
deleted file mode 100644
index b336cc7ce..000000000
--- a/grc/examples/xmlrpc/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-/Makefile
-/Makefile.in
diff --git a/grc/examples/xmlrpc/readme.txt b/grc/examples/xmlrpc/readme.txt
deleted file mode 100644
index c1f87c1cb..000000000
--- a/grc/examples/xmlrpc/readme.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-##################################################
-# 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/grc/examples/xmlrpc/xmlrpc_client.grc b/grc/examples/xmlrpc/xmlrpc_client.grc
deleted file mode 100644
index 3bb4e7ed3..000000000
--- a/grc/examples/xmlrpc/xmlrpc_client.grc
+++ /dev/null
@@ -1,312 +0,0 @@
-<?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/grc/examples/xmlrpc/xmlrpc_client_script.py b/grc/examples/xmlrpc/xmlrpc_client_script.py
deleted file mode 100644
index 956fa07fb..000000000
--- a/grc/examples/xmlrpc/xmlrpc_client_script.py
+++ /dev/null
@@ -1,23 +0,0 @@
-#!/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/grc/examples/xmlrpc/xmlrpc_server.grc b/grc/examples/xmlrpc/xmlrpc_server.grc
deleted file mode 100644
index dc539ef1b..000000000
--- a/grc/examples/xmlrpc/xmlrpc_server.grc
+++ /dev/null
@@ -1,384 +0,0 @@
-<?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
author	Johnathan Corgan	2009-10-12 18:46:56 -0700
committer	Johnathan Corgan	2009-10-12 18:46:56 -0700
commit	4df83569c130c1f4fe2aba3e1b5dd1419272f22f (patch)
tree	f64ccf30880228ab639ff06c971603e214b6303f /grc
parent	83ddffdaa968c5131228346b5f3f2ca123b759c7 (diff)
parent	3eeb2720664ec7cb67e60d4f8a01b933ddba0143 (diff)
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