<?xml version='1.0' encoding='ASCII'?> <flow_graph> <timestamp>Tue Mar 17 12:53:37 2009</timestamp> <block> <key>options</key> <param> <key>id</key> <value>dpsk_loopback</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>title</key> <value>DPSK Loopback</value> </param> <param> <key>author</key> <value>Example</value> </param> <param> <key>description</key> <value>gnuradio flow graph</value> </param> <param> <key>window_size</key> <value>1280, 1024</value> </param> <param> <key>generate_options</key> <value>wx_gui</value> </param> <param> <key>category</key> <value>Custom</value> </param> <param> <key>realtime_scheduling</key> <value></value> </param> <param> <key>_coordinate</key> <value>(10, 10)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>blks2_dxpsk_mod</key> <param> <key>id</key> <value>blks2_dxpsk_mod_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>dbpsk</value> </param> <param> <key>samples_per_symbol</key> <value>2</value> </param> <param> <key>excess_bw</key> <value>0.35</value> </param> <param> <key>gray_code</key> <value>True</value> </param> <param> <key>_coordinate</key> <value>(426, 295)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>samp_rate</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>10000</value> </param> <param> <key>_coordinate</key> <value>(10, 170)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_slider</key> <param> <key>id</key> <value>freq</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Frequency (Hz)</value> </param> <param> <key>value</key> <value>500</value> </param> <param> <key>min</key> <value>0</value> </param> <param> <key>max</key> <value>samp_rate/2</value> </param> <param> <key>num_steps</key> <value>100</value> </param> <param> <key>slider_length</key> <value>200</value> </param> <param> <key>slider_type</key> <value>horizontal</value> </param> <param> <key>grid_pos</key> <value></value> </param> <param> <key>_coordinate</key> <value>(12, 257)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>blks2_packet_encoder</key> <param> <key>id</key> <value>blks2_packet_encoder_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>float</value> </param> <param> <key>samples_per_symbol</key> <value>2</value> </param> <param> <key>bits_per_symbol</key> <value>1</value> </param> <param> <key>access_code</key> <value></value> </param> <param> <key>pad_for_usrp</key> <value>True</value> </param> <param> <key>payload_length</key> <value>0</value> </param> <param> <key>_coordinate</key> <value>(216, 260)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>gr_throttle</key> <param> <key>id</key> <value>gr_throttle_0_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>float</value> </param> <param> <key>samples_per_second</key> <value>samp_rate</value> </param> <param> <key>vlen</key> <value>1</value> </param> <param> <key>_coordinate</key> <value>(225, 174)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>gr_sig_source_x</key> <param> <key>id</key> <value>gr_sig_source_x_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>float</value> </param> <param> <key>samp_rate</key> <value>samp_rate</value> </param> <param> <key>waveform</key> <value>gr.GR_COS_WAVE</value> </param> <param> <key>freq</key> <value>freq</value> </param> <param> <key>amp</key> <value>1</value> </param> <param> <key>offset</key> <value>0</value> </param> <param> <key>_coordinate</key> <value>(203, 8)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>blks2_packet_decoder</key> <param> <key>id</key> <value>blks2_packet_decoder_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>float</value> </param> <param> <key>access_code</key> <value></value> </param> <param> <key>threshold</key> <value>-1</value> </param> <param> <key>_coordinate</key> <value>(551, 65)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>wxgui_scopesink2</key> <param> <key>id</key> <value>wxgui_scopesink2_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>float</value> </param> <param> <key>title</key> <value>Scope Plot</value> </param> <param> <key>samp_rate</key> <value>samp_rate</value> </param> <param> <key>frame_decim</key> <value>15</value> </param> <param> <key>v_scale</key> <value>0</value> </param> <param> <key>t_scale</key> <value>1./freq</value> </param> <param> <key>marker</key> <value>set_format_line</value> </param> <param> <key>num_inputs</key> <value>1</value> </param> <param> <key>grid_pos</key> <value></value> </param> <param> <key>_coordinate</key> <value>(769, 12)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>blks2_dxpsk_demod</key> <param> <key>id</key> <value>blks2_dxpsk_demod_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>dbpsk</value> </param> <param> <key>samples_per_symbol</key> <value>2</value> </param> <param> <key>excess_bw</key> <value>0.35</value> </param> <param> <key>costas_alpha</key> <value>0.175</value> </param> <param> <key>gain_mu</key> <value>0.175</value> </param> <param> <key>mu</key> <value>0.5</value> </param> <param> <key>omega_relative_limit</key> <value>0.005</value> </param> <param> <key>gray_code</key> <value>True</value> </param> <param> <key>_coordinate</key> <value>(691, 219)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <connection> <source_block_id>blks2_dxpsk_mod_0</source_block_id> <sink_block_id>blks2_dxpsk_demod_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>blks2_dxpsk_demod_0</source_block_id> <sink_block_id>blks2_packet_decoder_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>blks2_packet_encoder_0</source_block_id> <sink_block_id>blks2_dxpsk_mod_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>gr_sig_source_x_0</source_block_id> <sink_block_id>gr_throttle_0_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>gr_throttle_0_0</source_block_id> <sink_block_id>blks2_packet_encoder_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>blks2_packet_decoder_0</source_block_id> <sink_block_id>wxgui_scopesink2_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> </flow_graph>