<?xml version='1.0' encoding='ASCII'?>
<flow_graph>
<timestamp>Mon May 21 15:05:36 2012</timestamp>
<block>
<key>options</key>
<param>
<key>id</key>
<value>ssb_rx</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>title</key>
<value>SSB Receiver</value>
</param>
<param>
<key>author</key>
<value>OZ9AEC</value>
</param>
<param>
<key>description</key>
<value>Simple SSB receiver prototype</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>max_nouts</key>
<value>0</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>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>-120000</value>
</param>
<param>
<key>max</key>
<value>120000</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>(12, 106)</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>(12, 244)</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, 125000, 25000, firdes.WIN_HAMMING, 6.76)</value>
</param>
<param>
<key>_coordinate</key>
<value>(392, 238)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable_static_text</key>
<param>
<key>id</key>
<value>lo_freq</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>label</key>
<value>LO</value>
</param>
<param>
<key>value</key>
<value>LO</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>5,2,1,1</value>
</param>
<param>
<key>notebook</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(169, 86)</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>13490.0</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>(668, 75)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable_slider</key>
<param>
<key>id</key>
<value>center</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>label</key>
<value>Center</value>
</param>
<param>
<key>value</key>
<value>+1500</value>
</param>
<param>
<key>min</key>
<value>-5000</value>
</param>
<param>
<key>max</key>
<value>5000</value>
</param>
<param>
<key>num_steps</key>
<value>200</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>(14, 525)</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>0</value>
</param>
<param>
<key>max</key>
<value>50</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>7,1,1,1</value>
</param>
<param>
<key>notebook</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(15, 800)</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>2600</value>
</param>
<param>
<key>min</key>
<value>100</value>
</param>
<param>
<key>max</key>
<value>5000</value>
</param>
<param>
<key>num_steps</key>
<value>490</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>(13, 386)</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>500</value>
</param>
<param>
<key>min</key>
<value>100</value>
</param>
<param>
<key>max</key>
<value>2000</value>
</param>
<param>
<key>num_steps</key>
<value>190</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>9,0,1,1</value>
</param>
<param>
<key>notebook</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(14, 662)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable</key>
<param>
<key>id</key>
<value>low</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>value</key>
<value>center-width/2</value>
</param>
<param>
<key>_coordinate</key>
<value>(152, 661)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable</key>
<param>
<key>id</key>
<value>high</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>value</key>
<value>center+width/2</value>
</param>
<param>
<key>_coordinate</key>
<value>(235, 662)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>band_pass_filter</key>
<param>
<key>id</key>
<value>band_pass_filter</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>type</key>
<value>fir_filter_ccc</value>
</param>
<param>
<key>decim</key>
<value>5</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>low_cutoff_freq</key>
<value>low</value>
</param>
<param>
<key>high_cutoff_freq</key>
<value>high</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>(669, 291)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>gr_agc2_xx</key>
<param>
<key>id</key>
<value>agc</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>type</key>
<value>complex</value>
</param>
<param>
<key>attack_rate</key>
<value>0.1</value>
</param>
<param>
<key>decay_rate</key>
<value>agc_decay</value>
</param>
<param>
<key>reference</key>
<value>0.9</value>
</param>
<param>
<key>gain</key>
<value>1.0</value>
</param>
<param>
<key>max_gain</key>
<value>1.0</value>
</param>
<param>
<key>_coordinate</key>
<value>(882, 314)</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>64e6/256</value>
</param>
<param>
<key>_coordinate</key>
<value>(169, 11)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable</key>
<param>
<key>id</key>
<value>LO</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>value</key>
<value>5200000000</value>
</param>
<param>
<key>_coordinate</key>
<value>(257, 11)</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>USRP</value>
</param>
<param>
<key>value</key>
<value>560900000</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>(337, 11)</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>LO+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>(472, 11)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>audio_sink</key>
<param>
<key>id</key>
<value>audio_sink_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>samp_rate</key>
<value>44100</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>(873, 512)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>gr_complex_to_real</key>
<param>
<key>id</key>
<value>gr_complex_to_real_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>vlen</key>
<value>1</value>
</param>
<param>
<key>_coordinate</key>
<value>(452, 545)</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>(656, 542)</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_1</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>type</key>
<value>ccc</value>
</param>
<param>
<key>decim</key>
<value>500</value>
</param>
<param>
<key>interp</key>
<value>441</value>
</param>
<param>
<key>taps</key>
<value>[]</value>
</param>
<param>
<key>fractional_bw</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(246, 519)</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>0.7</value>
</param>
<param>
<key>min</key>
<value>0</value>
</param>
<param>
<key>max</key>
<value>5</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>8,1,1,1</value>
</param>
<param>
<key>notebook</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(161, 802)</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','USRP']</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>(301, 801)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>variable_chooser</key>
<param>
<key>id</key>
<value>agc_decay</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>label</key>
<value>AGC</value>
</param>
<param>
<key>value</key>
<value>5e-5</value>
</param>
<param>
<key>choices</key>
<value>[1e-5, 5e-5, 1e-4]</value>
</param>
<param>
<key>labels</key>
<value>['Fast','Medium','Slow']</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>9,1,1,1</value>
</param>
<param>
<key>notebook</key>
<value></value>
</param>
<param>
<key>_coordinate</key>
<value>(453, 802)</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>(389, 321)</value>
</param>
<param>
<key>_rotation</key>
<value>0</value>
</param>
</block>
<block>
<key>rtl2832_source</key>
<param>
<key>id</key>
<value>rtl2832_source_0</value>
</param>
<param>
<key>_enabled</key>
<value>True</value>
</param>
<param>
<key>verbose</key>
<value>True</value>
</param>
<param>
<key>sample_rate</key>
<value>samp_rate</value>
</param>
<param>
<key>frequency</key>
<value>100000000</value>
</param>
<param>
<key>bandwidth</key>
<value>0</value>
</param>
<param>
<key>relative_gain</key>
<value>True</value>
</param>
<param>
<key>gain</key>
<value>0</value>
</param>
<param>
<key>gain_mode</key>
<value></value>
</param>
<param>
<key>auto_gain_mode</key>
<value>False</value>
</param>
<param>
<key>usb_vid</key>
<value>0</value>
</param>
<param>
<key>usb_pid</key>
<value>0</value>
</param>
<param>
<key>tuner_name</key>
<value></value>
</param>
<param>
<key>read_length</key>
<value>0</value>
</param>
<param>
<key>xfer_timeout</key>
<value>0</value>
</param>
<param>
<key>use_buffer</key>
<value>True</value>
</param>
<param>
<key>buf_mul</key>
<value>0</value>
</param>
<param>
<key>buf_level</key>
<value>0</value>
</param>
<param>
<key>fir_coeffs</key>
<value>[]</value>
</param>
<param>
<key>xtal_freq</key>
<value>0</value>
</param>
<param>
<key>_coordinate</key>
<value>(89, 243)</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>band_pass_filter</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>band_pass_filter</source_block_id>
<sink_block_id>agc</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>agc</source_block_id>
<sink_block_id>blks2_rational_resampler_xxx_1</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>gr_multiply_const_vxx_1</source_block_id>
<sink_block_id>audio_sink_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_0</sink_block_id>
<source_key>0</source_key>
<sink_key>1</sink_key>
</connection>
<connection>
<source_block_id>blks2_rational_resampler_xxx_1</source_block_id>
<sink_block_id>gr_complex_to_real_0</sink_block_id>
<source_key>0</source_key>
<sink_key>0</sink_key>
</connection>
<connection>
<source_block_id>gr_complex_to_real_0</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>rtl2832_source_0</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>
