Merge branch 'gr-fcd'

7 files changed, 2269 insertions, 0 deletions

diff --git a/gr-fcd/examples/.gitignore b/gr-fcd/examples/.gitignore
new file mode 100644
index 000000000..52ffc3037
--- /dev/null
+++ b/gr-fcd/examples/.gitignore
@@ -0,0 +1,6 @@
+/Makefile
+/Makefile.in
+/.deps/*
+/.libs/*
+/fcd_nfm_rx
+/fcd_nfm_rx.o
diff --git a/gr-fcd/examples/CMakeLists.txt b/gr-fcd/examples/CMakeLists.txt
new file mode 100644
index 000000000..477a6311b
--- /dev/null
+++ b/gr-fcd/examples/CMakeLists.txt
@@ -0,0 +1,41 @@
+# Copyright 2012 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_directories(${GR_FCD_INCLUDE_DIRS})
+include_directories(${GNURADIO_CORE_INCLUDE_DIRS})
+include_directories(${GR_AUDIO_INCLUDE_DIRS})
+
+add_executable(fcd_nfm_rx fcd_nfm_rx.cc)
+target_link_libraries(fcd_nfm_rx gnuradio-fcd)
+
+INSTALL(TARGETS
+    fcd_nfm_rx
+    DESTINATION ${GR_PKG_DATA_DIR}/examples/fcd
+    COMPONENT "fcd_examples"
+)
+
+if(ENABLE_PYTHON)
+  INSTALL(FILES
+    fcd_apt_rx.grc
+    fcd_fft_wx.grc
+    fcd_nfm_rx.grc
+    DESTINATION ${GR_PKG_DATA_DIR}/examples/fcd
+    COMPONENT "fcd_examples"
+  )
+endif()
diff --git a/gr-fcd/examples/Makefile.am b/gr-fcd/examples/Makefile.am
new file mode 100644
index 000000000..a57d7a808
--- /dev/null
+++ b/gr-fcd/examples/Makefile.am
@@ -0,0 +1,49 @@
+#
+# Copyright 2011,2012 Free Software Foundation, Inc.
+# 
+# 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 $(top_srcdir)/Makefile.common
+
+AM_CPPFLAGS = \
+	-I$(top_srcdir)/gr-fcd/include/fcd \
+	-I$(top_srcdir)/gr-audio/include \
+	$(STD_DEFINES_AND_INCLUDES) \
+	$(WITH_INCLUDES)
+
+GR_FCD_LA=$(top_builddir)/gr-fcd/lib/libgnuradio-fcd.la
+GNURADIO_AUDIO_LA=$(top_builddir)/gr-audio/lib/libgnuradio-audio.la
+
+ourdatadir = $(exampledir)/fcd
+
+ourdata_PROGRAMS = \
+	fcd_nfm_rx
+
+fcd_nfm_rx_SOURCES = \
+	fcd_nfm_rx.cc
+
+fcd_nfm_rx_LDADD = \
+	$(GR_FCD_LA) \
+	$(GNURADIO_CORE_LA) \
+	$(GNURADIO_AUDIO_LA) \
+	$(BOOST_PROGRAM_OPTIONS_LIB)
+
+dist_ourdata_SCRIPTS = \
+    fcd_fft_wx.grc \
+    fcd_apt_rx.grc \
+    fcd_nfm_rx.grc
+
diff --git a/gr-fcd/examples/fcd_apt_rx.grc b/gr-fcd/examples/fcd_apt_rx.grc
new file mode 100644
index 000000000..c4d3e64d1
--- /dev/null
+++ b/gr-fcd/examples/fcd_apt_rx.grc
@@ -0,0 +1,704 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+  <timestamp>Sun May  8 18:01:53 2011</timestamp>
+  <block>
+    <key>options</key>
+    <param>
+      <key>id</key>
+      <value>fcd_apt_rx</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>title</key>
+      <value>NOAA APT Receiver</value>
+    </param>
+    <param>
+      <key>author</key>
+      <value>Alexandru Csete OZ9AEC</value>
+    </param>
+    <param>
+      <key>description</key>
+      <value></value>
+    </param>
+    <param>
+      <key>window_size</key>
+      <value>1280, 1024</value>
+    </param>
+    <param>
+      <key>generate_options</key>
+      <value>wx_gui</value>
+    </param>
+    <param>
+      <key>category</key>
+      <value>Custom</value>
+    </param>
+    <param>
+      <key>run_options</key>
+      <value>prompt</value>
+    </param>
+    <param>
+      <key>run</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>realtime_scheduling</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(10, 10)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>96000</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(200, 9)</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>48000</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>(794, 355)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blks2_fm_demod_cf</key>
+    <param>
+      <key>id</key>
+      <value>blks2_fm_demod_cf</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>chan_rate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>audio_decim</key>
+      <value>2</value>
+    </param>
+    <param>
+      <key>deviation</key>
+      <value>max_dev</value>
+    </param>
+    <param>
+      <key>audio_pass</key>
+      <value>5000</value>
+    </param>
+    <param>
+      <key>audio_stop</key>
+      <value>7000</value>
+    </param>
+    <param>
+      <key>gain</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>tau</key>
+      <value>75e-6</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(568, 307)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blks2_rational_resampler_xxx</key>
+    <param>
+      <key>id</key>
+      <value>blks2_rational_resampler_xxx_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>fff</value>
+    </param>
+    <param>
+      <key>decim</key>
+      <value>48000</value>
+    </param>
+    <param>
+      <key>interp</key>
+      <value>11025</value>
+    </param>
+    <param>
+      <key>taps</key>
+      <value>[]</value>
+    </param>
+    <param>
+      <key>fractional_bw</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(516, 522)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>wav_file</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>prefix + datetime.now().strftime("%Y.%m.%d.%H.%M.%S") + ".wav"</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(762, 652)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>prefix</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>"FCD_APT_REC-"</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(625, 653)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</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 datetime import datetime</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(508, 653)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>gr_wavfile_sink</key>
+    <param>
+      <key>id</key>
+      <value>wavfile_sink</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>file</key>
+      <value>wav_file</value>
+    </param>
+    <param>
+      <key>nchan</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>samp_rate</key>
+      <value>11025</value>
+    </param>
+    <param>
+      <key>bits_per_sample</key>
+      <value>16</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(805, 530)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_chooser</key>
+    <param>
+      <key>id</key>
+      <value>sat_freq</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>Satellite</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>137500000</value>
+    </param>
+    <param>
+      <key>choices</key>
+      <value>[137500000,137620000,137912500,137100000]</value>
+    </param>
+    <param>
+      <key>labels</key>
+      <value>["NOAA-15","NOAA-17","NOAA-18","NOAA-19"]</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>drop_down</value>
+    </param>
+    <param>
+      <key>style</key>
+      <value>wx.RA_HORIZONTAL</value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>1,0,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(18, 479)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>max_dev</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>17000</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(299, 10)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_chooser</key>
+    <param>
+      <key>id</key>
+      <value>fcd_lna_gain</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>LNA gain [dB]</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>20.0</value>
+    </param>
+    <param>
+      <key>choices</key>
+      <value>[30.0, 25.0, 20.0, 17.5, 15.0, 12.5, 10.0, 7.5, 5.0, 2.5, 0.0, -2.5, -5.0]</value>
+    </param>
+    <param>
+      <key>labels</key>
+      <value>[]</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>drop_down</value>
+    </param>
+    <param>
+      <key>style</key>
+      <value>wx.RA_HORIZONTAL</value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>2,0,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(207, 481)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_static_text</key>
+    <param>
+      <key>id</key>
+      <value>rec_info</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>Recording to</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>wav_file</value>
+    </param>
+    <param>
+      <key>converver</key>
+      <value>str_converter</value>
+    </param>
+    <param>
+      <key>formatter</key>
+      <value>None</value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>1,1,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(641, 14)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>low_pass_filter</key>
+    <param>
+      <key>id</key>
+      <value>low_pass_filter</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>fir_filter_ccf</value>
+    </param>
+    <param>
+      <key>decim</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>interp</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>gain</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>samp_rate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>cutoff_freq</key>
+      <value>25000</value>
+    </param>
+    <param>
+      <key>width</key>
+      <value>5000</value>
+    </param>
+    <param>
+      <key>win</key>
+      <value>firdes.WIN_HAMMING</value>
+    </param>
+    <param>
+      <key>beta</key>
+      <value>6.76</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(334, 307)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>fcd_source_c</key>
+    <param>
+      <key>id</key>
+      <value>fcd_source_c_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>device_name</key>
+      <value>hw:1</value>
+    </param>
+    <param>
+      <key>freq</key>
+      <value>sat_freq</value>
+    </param>
+    <param>
+      <key>lna</key>
+      <value>fcd_lna_gain</value>
+    </param>
+    <param>
+      <key>ppm</key>
+      <value>-120</value>
+    </param>
+    <param>
+      <key>dci</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>dcq</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>iq_phase</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>iq_gain</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(25, 299)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>wxgui_fftsink2</key>
+    <param>
+      <key>id</key>
+      <value>fftsink</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>title</key>
+      <value>FCD Spectrum</value>
+    </param>
+    <param>
+      <key>samp_rate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>baseband_freq</key>
+      <value>sat_freq</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>0.0</value>
+    </param>
+    <param>
+      <key>ref_scale</key>
+      <value>1.0</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>win</key>
+      <value>None</value>
+    </param>
+    <param>
+      <key>win_size</key>
+      <value></value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>0,0,1,2</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(335, 103)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <connection>
+    <source_block_id>low_pass_filter</source_block_id>
+    <sink_block_id>blks2_fm_demod_cf</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blks2_fm_demod_cf</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>blks2_rational_resampler_xxx_0</source_block_id>
+    <sink_block_id>wavfile_sink</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blks2_fm_demod_cf</source_block_id>
+    <sink_block_id>blks2_rational_resampler_xxx_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>fcd_source_c_0</source_block_id>
+    <sink_block_id>low_pass_filter</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>fcd_source_c_0</source_block_id>
+    <sink_block_id>fftsink</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+</flow_graph>
diff --git a/gr-fcd/examples/fcd_fft_wx.grc b/gr-fcd/examples/fcd_fft_wx.grc
new file mode 100644
index 000000000..c045bbfa2
--- /dev/null
+++ b/gr-fcd/examples/fcd_fft_wx.grc
@@ -0,0 +1,320 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+  <timestamp>Sun May  8 18:02:35 2011</timestamp>
+  <block>
+    <key>options</key>
+    <param>
+      <key>id</key>
+      <value>fcd_fft_wx</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>title</key>
+      <value>Funcube Dongle FFT scope</value>
+    </param>
+    <param>
+      <key>author</key>
+      <value>Alexandru Csete OZ9AEC</value>
+    </param>
+    <param>
+      <key>description</key>
+      <value></value>
+    </param>
+    <param>
+      <key>window_size</key>
+      <value>1280, 1024</value>
+    </param>
+    <param>
+      <key>generate_options</key>
+      <value>wx_gui</value>
+    </param>
+    <param>
+      <key>category</key>
+      <value>Custom</value>
+    </param>
+    <param>
+      <key>run_options</key>
+      <value>prompt</value>
+    </param>
+    <param>
+      <key>run</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>realtime_scheduling</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(10, 10)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>96000</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(201, 11)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_text_box</key>
+    <param>
+      <key>id</key>
+      <value>fcd_freq</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>FCD freq</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>145500000</value>
+    </param>
+    <param>
+      <key>converver</key>
+      <value>float_converter</value>
+    </param>
+    <param>
+      <key>formatter</key>
+      <value>None</value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>1,0,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(300, 11)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_chooser</key>
+    <param>
+      <key>id</key>
+      <value>fcd_lna_gain</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>LNA gain [dB]</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>20.0</value>
+    </param>
+    <param>
+      <key>choices</key>
+      <value>[30.0, 25.0, 20.0, 17.5, 15.0, 12.5, 10.0, 7.5, 5.0, 2.5, 0.0, -2.5, -5.0]</value>
+    </param>
+    <param>
+      <key>labels</key>
+      <value>[]</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>drop_down</value>
+    </param>
+    <param>
+      <key>style</key>
+      <value>wx.RA_HORIZONTAL</value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>2,0,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(446, 10)</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>FCD Spectrum</value>
+    </param>
+    <param>
+      <key>samp_rate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>baseband_freq</key>
+      <value>fcd_freq</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>1.0</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>win</key>
+      <value>None</value>
+    </param>
+    <param>
+      <key>win_size</key>
+      <value></value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>0,0,1,2</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(442, 176)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>fcd_source_c</key>
+    <param>
+      <key>id</key>
+      <value>fcd_source_c_1</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>device_name</key>
+      <value>hw:1</value>
+    </param>
+    <param>
+      <key>freq</key>
+      <value>fcd_freq</value>
+    </param>
+    <param>
+      <key>lna</key>
+      <value>fcd_lna_gain</value>
+    </param>
+    <param>
+      <key>ppm</key>
+      <value>-120</value>
+    </param>
+    <param>
+      <key>dci</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>dcq</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>iq_phase</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>iq_gain</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(95, 192)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <connection>
+    <source_block_id>fcd_source_c_1</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/gr-fcd/examples/fcd_nfm_rx.cc b/gr-fcd/examples/fcd_nfm_rx.cc
new file mode 100644
index 000000000..97ef7cf19
--- /dev/null
+++ b/gr-fcd/examples/fcd_nfm_rx.cc
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2011 Free Software Foundation, Inc.
+ * 
+ * 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.
+ */
+
+/*
+ * Simple GNU Radio C++ example for using the Funcube Dongle.
+ * 
+ * Construct a simple narrow band FM receiver using the gr-fcd
+ * block as source.
+ * 
+ * This example uses "hw:1" as FCD source device and the default
+ * audio device for output.
+ *
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+// Include header files for each block used in flowgraph
+#include <gr_top_block.h>
+#include <gr_firdes.h>
+#include <gr_fir_filter_ccf.h>
+#include <gr_quadrature_demod_cf.h>
+#include <gr_audio_sink.h>
+#include <fcd_source_c.h>
+
+// other includes
+#include <iostream>
+#include <boost/program_options.hpp>
+
+
+namespace po = boost::program_options;
+
+int main(int argc, char **argv)
+{
+    int rate = 48000;		// Audio card sample rate
+    float pi = 3.141592654;
+
+
+    //variables to be set by po
+    std::string device;
+    int freq;
+    float gain;
+
+    //setup the program options
+    po::options_description desc("Command line options");
+    desc.add_options()
+        ("help", "This help message")
+        ("device", po::value<std::string>(&device)->default_value("hw:1"), "Audio input device")
+        ("freq", po::value<int>(&freq)->default_value(145500), "RF frequency in kHz")
+        ("gain", po::value<float>(&gain)->default_value(20.0), "LNA gain in dB")
+    ;
+    po::variables_map vm;
+    po::store(po::parse_command_line(argc, argv, desc), vm);
+    po::notify(vm);
+
+    //print the help message
+    if (vm.count("help")){
+        std::cout << "Narrow band FM receiver example" << std::endl << desc << std::endl;
+        return ~0;
+    }
+
+
+    // Construct a top block that will contain flowgraph blocks.
+    gr_top_block_sptr tb = gr_make_top_block("fcd_nfm_rx");
+
+    // FCD source
+    fcd_source_c_sptr fcd = fcd_make_source_c(device);
+    fcd->set_freq_khz(freq);
+    fcd->set_lna_gain(gain);
+    
+    // Low pass filter
+    std::vector<float> taps = gr_firdes::low_pass(1.0, 96000, 5000.0, 1000.0);
+    gr_fir_filter_ccf_sptr filter = gr_make_fir_filter_ccf (2, taps);
+
+    // FM demodulator
+    // gain = sample_rate / (2*pi*max_dev)
+    gr_quadrature_demod_cf_sptr demod = gr_make_quadrature_demod_cf (rate/(2.0*pi*5000.0));
+
+    // Audio sink
+    audio_sink::sptr sink = audio_make_sink(rate);
+
+    // Connect blocks
+    tb->connect(fcd, 0, filter, 0);
+    tb->connect(filter, 0, demod, 0);
+    tb->connect(demod, 0, sink, 0);
+
+    // Tell GNU Radio runtime to start flowgraph threads; the foreground thread
+    // will block until either flowgraph exits (this example doesn't) or the
+    // application receives SIGINT (e.g., user hits CTRL-C).
+    //
+    // Real applications may use tb->start() which returns, allowing the foreground
+    // thread to proceed, then later use tb->stop(), followed by tb->wait(), to cleanup
+    // GNU Radio before exiting.
+    tb->run();
+
+    // Exit normally.
+    return 0;
+}
diff --git a/gr-fcd/examples/fcd_nfm_rx.grc b/gr-fcd/examples/fcd_nfm_rx.grc
new file mode 100644
index 000000000..9dac3fcb8
--- /dev/null
+++ b/gr-fcd/examples/fcd_nfm_rx.grc
@@ -0,0 +1,1035 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+  <timestamp>Sun May  8 18:05:32 2011</timestamp>
+  <block>
+    <key>options</key>
+    <param>
+      <key>id</key>
+      <value>fcd_nfm_rx</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>title</key>
+      <value>FCD FM Receiver</value>
+    </param>
+    <param>
+      <key>author</key>
+      <value>OZ9AEC</value>
+    </param>
+    <param>
+      <key>description</key>
+      <value>Simple FM receiver using the Funcube Dongle</value>
+    </param>
+    <param>
+      <key>window_size</key>
+      <value>1280, 1024</value>
+    </param>
+    <param>
+      <key>generate_options</key>
+      <value>wx_gui</value>
+    </param>
+    <param>
+      <key>category</key>
+      <value>Custom</value>
+    </param>
+    <param>
+      <key>run_options</key>
+      <value>prompt</value>
+    </param>
+    <param>
+      <key>run</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>realtime_scheduling</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(10, 10)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_static_text</key>
+    <param>
+      <key>id</key>
+      <value>rx_freq</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>Receive</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>freq+(offset_coarse+offset_fine)</value>
+    </param>
+    <param>
+      <key>converver</key>
+      <value>float_converter</value>
+    </param>
+    <param>
+      <key>formatter</key>
+      <value>None</value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>5,3,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(491, 10)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_slider</key>
+    <param>
+      <key>id</key>
+      <value>offset_fine</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>Fine tune</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>min</key>
+      <value>-1000</value>
+    </param>
+    <param>
+      <key>max</key>
+      <value>1000</value>
+    </param>
+    <param>
+      <key>num_steps</key>
+      <value>400</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>6,0,1,2</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(9, 279)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_slider</key>
+    <param>
+      <key>id</key>
+      <value>offset_coarse</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>Coarse tune</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>min</key>
+      <value>-48000</value>
+    </param>
+    <param>
+      <key>max</key>
+      <value>48000</value>
+    </param>
+    <param>
+      <key>num_steps</key>
+      <value>960</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>6,2,1,2</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(10, 130)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_slider</key>
+    <param>
+      <key>id</key>
+      <value>width</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>Filter</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>10000</value>
+    </param>
+    <param>
+      <key>min</key>
+      <value>2000</value>
+    </param>
+    <param>
+      <key>max</key>
+      <value>40000</value>
+    </param>
+    <param>
+      <key>num_steps</key>
+      <value>760</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>7,0,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(9, 431)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_slider</key>
+    <param>
+      <key>id</key>
+      <value>trans</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>Trans</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>1500</value>
+    </param>
+    <param>
+      <key>min</key>
+      <value>500</value>
+    </param>
+    <param>
+      <key>max</key>
+      <value>5000</value>
+    </param>
+    <param>
+      <key>num_steps</key>
+      <value>900</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>8,0,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(10, 577)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_slider</key>
+    <param>
+      <key>id</key>
+      <value>af_gain</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>VOL</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>min</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>max</key>
+      <value>5</value>
+    </param>
+    <param>
+      <key>num_steps</key>
+      <value>50</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>8,1,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(168, 726)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>low_pass_filter</key>
+    <param>
+      <key>id</key>
+      <value>low_pass_filter</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>fir_filter_ccf</value>
+    </param>
+    <param>
+      <key>decim</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>interp</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>gain</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>samp_rate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>cutoff_freq</key>
+      <value>width/2</value>
+    </param>
+    <param>
+      <key>width</key>
+      <value>trans</value>
+    </param>
+    <param>
+      <key>win</key>
+      <value>firdes.WIN_HAMMING</value>
+    </param>
+    <param>
+      <key>beta</key>
+      <value>6.76</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(742, 258)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>gr_simple_squelch_cc</key>
+    <param>
+      <key>id</key>
+      <value>gr_simple_squelch_cc_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>threshold</key>
+      <value>sql_lev</value>
+    </param>
+    <param>
+      <key>alpha</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(226, 499)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blks2_nbfm_rx</key>
+    <param>
+      <key>id</key>
+      <value>nbfm_normal</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>audio_rate</key>
+      <value>48000</value>
+    </param>
+    <param>
+      <key>quad_rate</key>
+      <value>96000</value>
+    </param>
+    <param>
+      <key>tau</key>
+      <value>75e-6</value>
+    </param>
+    <param>
+      <key>max_dev</key>
+      <value>5e3</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(441, 483)</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>float</value>
+    </param>
+    <param>
+      <key>const</key>
+      <value>af_gain</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(674, 507)</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>48000</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>2</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(882, 511)</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>96000</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(210, 12)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>wxgui_fftsink2</key>
+    <param>
+      <key>id</key>
+      <value>fftsink</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>title</key>
+      <value></value>
+    </param>
+    <param>
+      <key>samp_rate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>baseband_freq</key>
+      <value>rx_freq*display_selector</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>1.0</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>True</value>
+    </param>
+    <param>
+      <key>avg_alpha</key>
+      <value>0.5</value>
+    </param>
+    <param>
+      <key>win</key>
+      <value>None</value>
+    </param>
+    <param>
+      <key>win_size</key>
+      <value>800,300</value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>0,0,5,4</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(742, 24)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_slider</key>
+    <param>
+      <key>id</key>
+      <value>sql_lev</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>SQL</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>-100</value>
+    </param>
+    <param>
+      <key>min</key>
+      <value>-100</value>
+    </param>
+    <param>
+      <key>max</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>num_steps</key>
+      <value>500</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>7,2,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(328, 728)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>xlate_filter_taps</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>firdes.low_pass(1, samp_rate, 48000, 5000, firdes.WIN_HAMMING, 6.76)</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(428, 294)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_chooser</key>
+    <param>
+      <key>id</key>
+      <value>display_selector</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>Spectrum</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>choices</key>
+      <value>[0, 1]</value>
+    </param>
+    <param>
+      <key>labels</key>
+      <value>['Baseband','RF']</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>drop_down</value>
+    </param>
+    <param>
+      <key>style</key>
+      <value>wx.RA_HORIZONTAL</value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>5,0,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(481, 728)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_text_box</key>
+    <param>
+      <key>id</key>
+      <value>freq</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>FCD Freq</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>144470000</value>
+    </param>
+    <param>
+      <key>converver</key>
+      <value>float_converter</value>
+    </param>
+    <param>
+      <key>formatter</key>
+      <value>None</value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value>5,1,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(339, 9)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>gr_freq_xlating_fir_filter_xxx</key>
+    <param>
+      <key>id</key>
+      <value>xlating_fir_filter</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>xlate_filter_taps</value>
+    </param>
+    <param>
+      <key>center_freq</key>
+      <value>-(offset_coarse+offset_fine)</value>
+    </param>
+    <param>
+      <key>samp_rate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(433, 189)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_slider</key>
+    <param>
+      <key>id</key>
+      <value>rf_gain</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>RF</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>20</value>
+    </param>
+    <param>
+      <key>min</key>
+      <value>-5</value>
+    </param>
+    <param>
+      <key>max</key>
+      <value>30</value>
+    </param>
+    <param>
+      <key>num_steps</key>
+      <value>35</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>7,1,1,1</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(11, 725)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>fcd_source_c</key>
+    <param>
+      <key>id</key>
+      <value>fcd_source_c_1</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>device_name</key>
+      <value>hw:1</value>
+    </param>
+    <param>
+      <key>freq</key>
+      <value>freq</value>
+    </param>
+    <param>
+      <key>lna</key>
+      <value>rf_gain</value>
+    </param>
+    <param>
+      <key>ppm</key>
+      <value>-120</value>
+    </param>
+    <param>
+      <key>dci</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>dcq</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>iq_phase</key>
+      <value>0.0</value>
+    </param>
+    <param>
+      <key>iq_gain</key>
+      <value>1.0</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(165, 157)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <connection>
+    <source_block_id>xlating_fir_filter</source_block_id>
+    <sink_block_id>fftsink</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>xlating_fir_filter</source_block_id>
+    <sink_block_id>low_pass_filter</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>low_pass_filter</source_block_id>
+    <sink_block_id>gr_simple_squelch_cc_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>gr_multiply_const_vxx_1</source_block_id>
+    <sink_block_id>audio_sink</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>1</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>gr_multiply_const_vxx_1</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>gr_simple_squelch_cc_0</source_block_id>
+    <sink_block_id>nbfm_normal</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>nbfm_normal</source_block_id>
+    <sink_block_id>gr_multiply_const_vxx_1</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>fcd_source_c_1</source_block_id>
+    <sink_block_id>xlating_fir_filter</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+</flow_graph>