<?xml version='1.0' encoding='ASCII'?> <flow_graph> <timestamp>Wed Dec 2 11:03:20 2009</timestamp> <block> <key>options</key> <param> <key>id</key> <value>usrp_rx_dpsk</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>title</key> <value>USRP RX DPSK</value> </param> <param> <key>author</key> <value></value> </param> <param> <key>description</key> <value></value> </param> <param> <key>window_size</key> <value>1280, 1024</value> </param> <param> <key>generate_options</key> <value>wx_gui</value> </param> <param> <key>category</key> <value>Custom</value> </param> <param> <key>run_options</key> <value>prompt</value> </param> <param> <key>run</key> <value>True</value> </param> <param> <key>realtime_scheduling</key> <value></value> </param> <param> <key>_coordinate</key> <value>(12, 9)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>samps_per_sym</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>4</value> </param> <param> <key>_coordinate</key> <value>(14, 79)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>bb_freq</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>2.45e9</value> </param> <param> <key>_coordinate</key> <value>(18, 151)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>p2p</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>2.0</value> </param> <param> <key>_coordinate</key> <value>(13, 314)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_slider</key> <param> <key>id</key> <value>timing_alpha</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Timing Alpha</value> </param> <param> <key>value</key> <value>.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>100</value> </param> <param> <key>style</key> <value>wx.SL_HORIZONTAL</value> </param> <param> <key>converver</key> <value>float_converter</value> </param> <param> <key>grid_pos</key> <value></value> </param> <param> <key>notebook</key> <value></value> </param> <param> <key>_coordinate</key> <value>(759, 365)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>gr_null_sink</key> <param> <key>id</key> <value>gr_null_sink_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>byte</value> </param> <param> <key>vlen</key> <value>1</value> </param> <param> <key>_coordinate</key> <value>(815, 80)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_slider</key> <param> <key>id</key> <value>costas_alpha</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Costas Alpha</value> </param> <param> <key>value</key> <value>0.175</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>style</key> <value>wx.SL_HORIZONTAL</value> </param> <param> <key>converver</key> <value>float_converter</value> </param> <param> <key>grid_pos</key> <value></value> </param> <param> <key>notebook</key> <value></value> </param> <param> <key>_coordinate</key> <value>(598, 367)</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>Receive Spectrum</value> </param> <param> <key>samp_rate</key> <value>samp_rate</value> </param> <param> <key>baseband_freq</key> <value>bb_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>-40</value> </param> <param> <key>ref_scale</key> <value>p2p</value> </param> <param> <key>fft_size</key> <value>1024</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></value> </param> <param> <key>notebook</key> <value></value> </param> <param> <key>_coordinate</key> <value>(383, 321)</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>1e6/4</value> </param> <param> <key>_coordinate</key> <value>(20, 234)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_slider</key> <param> <key>id</key> <value>gain</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Gain</value> </param> <param> <key>value</key> <value>20</value> </param> <param> <key>min</key> <value>0</value> </param> <param> <key>max</key> <value>70</value> </param> <param> <key>num_steps</key> <value>100</value> </param> <param> <key>style</key> <value>wx.SL_HORIZONTAL</value> </param> <param> <key>converver</key> <value>float_converter</value> </param> <param> <key>grid_pos</key> <value></value> </param> <param> <key>notebook</key> <value></value> </param> <param> <key>_coordinate</key> <value>(152, 378)</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>int(100e6/samp_rate)</value> </param> <param> <key>frequency</key> <value>bb_freq</value> </param> <param> <key>lo_offset</key> <value>float('inf')</value> </param> <param> <key>gain</key> <value>gain</value> </param> <param> <key>_coordinate</key> <value>(158, 51)</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_0</value> </param> <param> <key>_enabled</key> <value>False</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>int(64e6/samp_rate)</value> </param> <param> <key>frequency</key> <value>bb_freq</value> </param> <param> <key>lo_offset</key> <value>float('inf')</value> </param> <param> <key>gain</key> <value>gain</value> </param> <param> <key>side</key> <value>B</value> </param> <param> <key>rx_ant</key> <value>TX/RX</value> </param> <param> <key>hb_filters</key> <value></value> </param> <param> <key>_coordinate</key> <value>(154, 218)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>blks2_dxpsk2_demod</key> <param> <key>id</key> <value>blks2_dxpsk2_demod_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>costas_alpha</key> <value>costas_alpha</value> </param> <param> <key>timing_alpha</key> <value>timing_alpha</value> </param> <param> <key>timing_max_dev</key> <value>1.5</value> </param> <param> <key>omega_relative_limit</key> <value>0.005</value> </param> <param> <key>gray_code</key> <value>True</value> </param> <param> <key>verbose</key> <value>False</value> </param> <param> <key>log</key> <value>False</value> </param> <param> <key>sync_out</key> <value>True</value> </param> <param> <key>_coordinate</key> <value>(487, 64)</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>Recovered DQPSK Constellation</value> </param> <param> <key>samp_rate</key> <value>samp_rate/4/20</value> </param> <param> <key>v_scale</key> <value>0</value> </param> <param> <key>v_offset</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>win_size</key> <value></value> </param> <param> <key>grid_pos</key> <value></value> </param> <param> <key>notebook</key> <value></value> </param> <param> <key>_coordinate</key> <value>(760, 239)</value> </param> <param> <key>_rotation</key> <value>180</value> </param> </block> <block> <key>gr_keep_one_in_n</key> <param> <key>id</key> <value>gr_keep_one_in_n_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>complex</value> </param> <param> <key>n</key> <value>20</value> </param> <param> <key>vlen</key> <value>1</value> </param> <param> <key>_coordinate</key> <value>(873, 151)</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> <connection> <source_block_id>usrp2_source_xxxx_0</source_block_id> <sink_block_id>blks2_dxpsk2_demod_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>blks2_dxpsk2_demod_0</source_block_id> <sink_block_id>gr_null_sink_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>blks2_dxpsk2_demod_0</source_block_id> <sink_block_id>gr_keep_one_in_n_0</sink_block_id> <source_key>1</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>gr_keep_one_in_n_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>