<?xml version='1.0' encoding='ASCII'?> <flow_graph> <timestamp>Thu Oct 29 11:01:22 2009</timestamp> <block> <key>options</key> <param> <key>id</key> <value>usrp_rx_flex</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>title</key> <value>USRP FLEX Pager Receiver (Single Channel)</value> </param> <param> <key>author</key> <value></value> </param> <param> <key>description</key> <value></value> </param> <param> <key>window_size</key> <value>4095,4095</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>adc_rate</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>64e6</value> </param> <param> <key>_coordinate</key> <value>(225, 12)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>sample_rate</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>adc_rate/decim</value> </param> <param> <key>_coordinate</key> <value>(382, 12)</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>band_freq+(channel-61)*25e3</value> </param> <param> <key>_coordinate</key> <value>(480, 11)</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>FLEX Spectrum</value> </param> <param> <key>samp_rate</key> <value>sample_rate</value> </param> <param> <key>baseband_freq</key> <value>band_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>65536</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>win</key> <value>None</value> </param> <param> <key>win_size</key> <value></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>(34, 508)</value> </param> <param> <key>_rotation</key> <value>180</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>['RX Spectrum','Baseband']</value> </param> <param> <key>grid_pos</key> <value>1, 0, 1, 5</value> </param> <param> <key>notebook</key> <value></value> </param> <param> <key>_coordinate</key> <value>(9, 209)</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>import os, math</value> </param> <param> <key>_coordinate</key> <value>(10, 76)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>usrp_simple_source_x</key> <param> <key>id</key> <value>usrp_source</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>band_freq</value> </param> <param> <key>lo_offset</key> <value>float('inf')</value> </param> <param> <key>gain</key> <value>rx_gain</value> </param> <param> <key>side</key> <value>A</value> </param> <param> <key>rx_ant</key> <value>RXA</value> </param> <param> <key>hb_filters</key> <value></value> </param> <param> <key>_coordinate</key> <value>(32, 734)</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>gr_freq_xlating_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>channel_decim</value> </param> <param> <key>taps</key> <value>channel_taps</value> </param> <param> <key>center_freq</key> <value>band_freq-freq+offset</value> </param> <param> <key>samp_rate</key> <value>sample_rate</value> </param> <param> <key>_coordinate</key> <value>(321, 750)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>wxgui_fftsink2</key> <param> <key>id</key> <value>wxgui_fftsink2_1</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>complex</value> </param> <param> <key>title</key> <value>Channel Spectrum</value> </param> <param> <key>samp_rate</key> <value>channel_rate</value> </param> <param> <key>baseband_freq</key> <value>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>65536</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>win</key> <value>None</value> </param> <param> <key>win_size</key> <value></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>(344, 511)</value> </param> <param> <key>_rotation</key> <value>180</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>20</value> </param> <param> <key>_coordinate</key> <value>(310, 11)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>symbol_rate</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>3200</value> </param> <param> <key>_coordinate</key> <value>(590, 12)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>channel_decim</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>int(sample_rate/channel_rate)</value> </param> <param> <key>_coordinate</key> <value>(906, 12)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>deviation</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>4800</value> </param> <param> <key>_coordinate</key> <value>(688, 14)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>demod_k</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>3*channel_rate/(2*math.pi*deviation)</value> </param> <param> <key>_coordinate</key> <value>(598, 857)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>channel_taps</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>firdes.low_pass(10, sample_rate, passband/2.0, (channel_rate-passband)/2.0)</value> </param> <param> <key>_coordinate</key> <value>(325, 857)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>config_filename</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>os.environ["HOME"]+"/.gnuradio/config.conf"</value> </param> <param> <key>_coordinate</key> <value>(9, 133)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_config</key> <param> <key>id</key> <value>saved_band_freq</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>930.5125e6</value> </param> <param> <key>type</key> <value>real</value> </param> <param> <key>config_file</key> <value>config_filename</value> </param> <param> <key>section</key> <value>gr-pager</value> </param> <param> <key>option</key> <value>band_center</value> </param> <param> <key>writeback</key> <value>band_freq</value> </param> <param> <key>_coordinate</key> <value>(228, 311)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_config</key> <param> <key>id</key> <value>saved_channel</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>25</value> </param> <param> <key>type</key> <value>int</value> </param> <param> <key>config_file</key> <value>config_filename</value> </param> <param> <key>section</key> <value>gr-pager</value> </param> <param> <key>option</key> <value>channel</value> </param> <param> <key>writeback</key> <value>channel</value> </param> <param> <key>_coordinate</key> <value>(387, 312)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_config</key> <param> <key>id</key> <value>saved_offset</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>0</value> </param> <param> <key>type</key> <value>real</value> </param> <param> <key>config_file</key> <value>config_filename</value> </param> <param> <key>section</key> <value>gr-pager</value> </param> <param> <key>option</key> <value>freq_offset</value> </param> <param> <key>writeback</key> <value>offset</value> </param> <param> <key>_coordinate</key> <value>(547, 312)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_config</key> <param> <key>id</key> <value>saved_rx_gain</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>40</value> </param> <param> <key>type</key> <value>int</value> </param> <param> <key>config_file</key> <value>config_filename</value> </param> <param> <key>section</key> <value>gr-pager</value> </param> <param> <key>option</key> <value>rx_gain</value> </param> <param> <key>writeback</key> <value>rx_gain</value> </param> <param> <key>_coordinate</key> <value>(706, 312)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_text_box</key> <param> <key>id</key> <value>band_freq</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Band Freq.</value> </param> <param> <key>value</key> <value>saved_band_freq</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>0, 0, 1, 1</value> </param> <param> <key>notebook</key> <value></value> </param> <param> <key>_coordinate</key> <value>(225, 121)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_static_text</key> <param> <key>id</key> <value>freq_text</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Ch. Freq</value> </param> <param> <key>value</key> <value>freq</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>0, 2, 1, 1</value> </param> <param> <key>notebook</key> <value></value> </param> <param> <key>_coordinate</key> <value>(801, 124)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>passband</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>2*(deviation+symbol_rate)</value> </param> <param> <key>_coordinate</key> <value>(327, 930)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>channel_rate</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>8*3200</value> </param> <param> <key>_coordinate</key> <value>(792, 13)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_slider</key> <param> <key>id</key> <value>channel</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Channel</value> </param> <param> <key>value</key> <value>saved_channel</value> </param> <param> <key>min</key> <value>1</value> </param> <param> <key>max</key> <value>120</value> </param> <param> <key>num_steps</key> <value>119</value> </param> <param> <key>style</key> <value>wx.SL_HORIZONTAL</value> </param> <param> <key>converver</key> <value>int_converter</value> </param> <param> <key>grid_pos</key> <value>0, 1, 1, 1</value> </param> <param> <key>notebook</key> <value></value> </param> <param> <key>_coordinate</key> <value>(376, 120)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_slider</key> <param> <key>id</key> <value>rx_gain</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Analog Gain</value> </param> <param> <key>value</key> <value>saved_rx_gain</value> </param> <param> <key>min</key> <value>0</value> </param> <param> <key>max</key> <value>100</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>int_converter</value> </param> <param> <key>grid_pos</key> <value>0, 4, 1, 1</value> </param> <param> <key>notebook</key> <value></value> </param> <param> <key>_coordinate</key> <value>(658, 122)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_slider</key> <param> <key>id</key> <value>offset</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Freq. Offset</value> </param> <param> <key>value</key> <value>saved_offset</value> </param> <param> <key>min</key> <value>-12.5e3</value> </param> <param> <key>max</key> <value>12.5e3</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, 3, 1, 1</value> </param> <param> <key>notebook</key> <value></value> </param> <param> <key>_coordinate</key> <value>(518, 118)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>gr_quadrature_demod_cf</key> <param> <key>id</key> <value>fm_demod</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>gain</key> <value>demod_k</value> </param> <param> <key>_coordinate</key> <value>(599, 774)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>baseband_rate</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>16000</value> </param> <param> <key>_coordinate</key> <value>(1019, 17)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>nchan_taps</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>len(channel_taps)</value> </param> <param> <key>_coordinate</key> <value>(412, 931)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>ma_ntaps</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>int(channel_rate/symbol_rate)</value> </param> <param> <key>_coordinate</key> <value>(850, 863)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>bb_interp</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>5</value> </param> <param> <key>_coordinate</key> <value>(938, 862)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>virtual_sink</key> <param> <key>id</key> <value>virtual_sink_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>stream_id</key> <value>baseband</value> </param> <param> <key>_coordinate</key> <value>(1100, 774)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>blks2_rational_resampler_xxx</key> <param> <key>id</key> <value>resampler</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>fff</value> </param> <param> <key>decim</key> <value>bb_decim</value> </param> <param> <key>interp</key> <value>bb_interp</value> </param> <param> 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