<?xml version='1.0' encoding='ASCII'?> <flow_graph> <timestamp>Sat Oct 8 15:27:04 2011</timestamp> <block> <key>parameter</key> <param> <key>id</key> <value>tx_gain</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Default TX Gain</value> </param> <param> <key>value</key> <value>0</value> </param> <param> <key>type</key> <value>eng_float</value> </param> <param> <key>short_id</key> <value></value> </param> <param> <key>_coordinate</key> <value>(999, 11)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>parameter</key> <param> <key>id</key> <value>freq</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Default Frequency</value> </param> <param> <key>value</key> <value>2.45e9</value> </param> <param> <key>type</key> <value>eng_float</value> </param> <param> <key>short_id</key> <value>f</value> </param> <param> <key>_coordinate</key> <value>(665, 11)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>parameter</key> <param> <key>id</key> <value>freq_offset</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Rx Frequency Offset</value> </param> <param> <key>value</key> <value>0</value> </param> <param> <key>type</key> <value>eng_float</value> </param> <param> <key>short_id</key> <value>o</value> </param> <param> <key>_coordinate</key> <value>(820, 11)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>parameter</key> <param> <key>id</key> <value>address1</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>IP Address, Dev 1</value> </param> <param> <key>value</key> <value>addr=192.168.11.2</value> </param> <param> <key>type</key> <value>string</value> </param> <param> <key>short_id</key> <value></value> </param> <param> <key>_coordinate</key> <value>(353, 14)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>parameter</key> <param> <key>id</key> <value>address0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>IP Address, Dev 0</value> </param> <param> <key>value</key> <value>addr=192.168.10.2</value> </param> <param> <key>type</key> <value>string</value> </param> <param> <key>short_id</key> <value></value> </param> <param> <key>_coordinate</key> <value>(193, 14)</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</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>complex</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>tone1</value> </param> <param> <key>amp</key> <value>tone_ampl</value> </param> <param> <key>offset</key> <value>0</value> </param> <param> <key>_coordinate</key> <value>(258, 136)</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_x0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>complex</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>tone2</value> </param> <param> <key>amp</key> <value>tone_ampl</value> </param> <param> <key>offset</key> <value>0</value> </param> <param> <key>_coordinate</key> <value>(259, 248)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>gr_noise_source_x</key> <param> <key>id</key> <value>gr_noise_source_x</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>complex</value> </param> <param> <key>noise_type</key> <value>gr.GR_GAUSSIAN</value> </param> <param> <key>amp</key> <value>noise_ampl</value> </param> <param> <key>seed</key> <value>42</value> </param> <param> <key>_coordinate</key> <value>(279, 364)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>uhd_usrp_sink</key> <param> <key>id</key> <value>uhd_usrp_sink_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>complex</value> </param> <param> <key>dev_addr</key> <value>address0</value> </param> <param> <key>sync</key> <value></value> </param> <param> <key>clock_rate</key> <value>0.0</value> </param> <param> <key>num_mboards</key> <value>1</value> </param> <param> <key>ref_source0</key> <value></value> </param> <param> <key>sd_spec0</key> <value></value> </param> <param> <key>ref_source1</key> <value></value> </param> <param> <key>sd_spec1</key> <value></value> </param> <param> <key>ref_source2</key> <value></value> </param> <param> <key>sd_spec2</key> <value></value> </param> <param> <key>ref_source3</key> <value></value> </param> <param> <key>sd_spec3</key> <value></value> </param> <param> <key>ref_source4</key> <value></value> </param> <param> <key>sd_spec4</key> <value></value> </param> <param> <key>ref_source5</key> <value></value> </param> <param> <key>sd_spec5</key> <value></value> </param> <param> <key>ref_source6</key> <value></value> </param> <param> <key>sd_spec6</key> <value></value> </param> <param> <key>ref_source7</key> <value></value> </param> <param> <key>sd_spec7</key> <value></value> </param> <param> <key>nchan</key> <value>1</value> </param> <param> <key>samp_rate</key> <value>samp_rate</value> </param> <param> <key>center_freq0</key> <value>tun_freq</value> </param> <param> <key>gain0</key> <value>tun_rx_gain</value> </param> <param> <key>ant0</key> <value></value> </param> <param> <key>bw0</key> <value>0</value> </param> <param> <key>center_freq1</key> <value>0</value> </param> <param> <key>gain1</key> <value>0</value> </param> <param> <key>ant1</key> <value></value> </param> <param> <key>bw1</key> <value>0</value> </param> <param> <key>center_freq2</key> <value>0</value> </param> <param> <key>gain2</key> <value>0</value> </param> <param> <key>ant2</key> <value></value> </param> <param> <key>bw2</key> <value>0</value> </param> <param> <key>center_freq3</key> <value>0</value> </param> <param> <key>gain3</key> <value>0</value> </param> <param> <key>ant3</key> <value></value> </param> <param> <key>bw3</key> <value>0</value> </param> <param> <key>center_freq4</key> <value>0</value> </param> <param> <key>gain4</key> <value>0</value> </param> <param> <key>ant4</key> <value></value> </param> <param> <key>bw4</key> <value>0</value> </param> <param> <key>center_freq5</key> <value>0</value> </param> <param> <key>gain5</key> <value>0</value> </param> <param> <key>ant5</key> <value></value> </param> <param> <key>bw5</key> <value>0</value> </param> <param> <key>center_freq6</key> <value>0</value> </param> <param> <key>gain6</key> <value>0</value> </param> <param> <key>ant6</key> <value></value> </param> <param> <key>bw6</key> <value>0</value> </param> <param> <key>center_freq7</key> <value>0</value> </param> <param> <key>gain7</key> <value>0</value> </param> <param> <key>ant7</key> <value></value> </param> <param> <key>bw7</key> <value>0</value> </param> <param> <key>center_freq8</key> <value>0</value> </param> <param> <key>gain8</key> <value>0</value> </param> <param> <key>ant8</key> <value></value> </param> <param> <key>bw8</key> <value>0</value> </param> <param> <key>center_freq9</key> <value>0</value> </param> <param> <key>gain9</key> <value>0</value> </param> <param> <key>ant9</key> <value></value> </param> <param> <key>bw9</key> <value>0</value> </param> <param> <key>center_freq10</key> <value>0</value> </param> <param> <key>gain10</key> <value>0</value> </param> <param> <key>ant10</key> <value></value> </param> <param> <key>bw10</key> <value>0</value> </param> <param> <key>center_freq11</key> <value>0</value> </param> <param> <key>gain11</key> <value>0</value> </param> <param> <key>ant11</key> <value></value> </param> <param> <key>bw11</key> <value>0</value> </param> <param> <key>center_freq12</key> <value>0</value> </param> <param> <key>gain12</key> <value>0</value> </param> <param> <key>ant12</key> <value></value> </param> <param> <key>bw12</key> <value>0</value> </param> <param> <key>center_freq13</key> <value>0</value> </param> <param> <key>gain13</key> <value>0</value> </param> <param> <key>ant13</key> <value></value> </param> <param> <key>bw13</key> <value>0</value> </param> <param> <key>center_freq14</key> <value>0</value> </param> <param> <key>gain14</key> <value>0</value> </param> <param> <key>ant14</key> <value></value> </param> <param> <key>bw14</key> <value>0</value> </param> <param> <key>center_freq15</key> <value>0</value> </param> <param> <key>gain15</key> <value>0</value> </param> <param> <key>ant15</key> <value></value> </param> <param> <key>bw15</key> <value>0</value> </param> <param> <key>center_freq16</key> <value>0</value> </param> <param> <key>gain16</key> <value>0</value> </param> <param> <key>ant16</key> <value></value> </param> <param> <key>bw16</key> <value>0</value> </param> <param> <key>center_freq17</key> <value>0</value> </param> <param> <key>gain17</key> <value>0</value> </param> <param> <key>ant17</key> <value></value> </param> <param> <key>bw17</key> <value>0</value> </param> <param> <key>center_freq18</key> <value>0</value> </param> <param> <key>gain18</key> <value>0</value> </param> <param> <key>ant18</key> <value></value> </param> <param> <key>bw18</key> <value>0</value> </param> <param> <key>center_freq19</key> <value>0</value> </param> <param> <key>gain19</key> <value>0</value> </param> <param> <key>ant19</key> <value></value> </param> <param> <key>bw19</key> <value>0</value> </param> <param> <key>center_freq20</key> <value>0</value> </param> <param> <key>gain20</key> <value>0</value> </param> <param> <key>ant20</key> <value></value> </param> <param> <key>bw20</key> <value>0</value> </param> <param> <key>center_freq21</key> <value>0</value> </param> <param> <key>gain21</key> <value>0</value> </param> <param> <key>ant21</key> <value></value> </param> <param> <key>bw21</key> <value>0</value> </param> <param> <key>center_freq22</key> <value>0</value> </param> <param> <key>gain22</key> <value>0</value> </param> <param> <key>ant22</key> <value></value> </param> <param> <key>bw22</key> <value>0</value> </param> <param> <key>center_freq23</key> <value>0</value> </param> <param> <key>gain23</key> <value>0</value> </param> <param> <key>ant23</key> <value></value> </param> <param> <key>bw23</key> <value>0</value> </param> <param> <key>center_freq24</key> <value>0</value> </param> <param> <key>gain24</key> <value>0</value> </param> <param> <key>ant24</key> <value></value> </param> <param> <key>bw24</key> <value>0</value> </param> <param> <key>center_freq25</key> <value>0</value> </param> <param> <key>gain25</key> <value>0</value> </param> <param> <key>ant25</key> <value></value> </param> <param> <key>bw25</key> <value>0</value> </param> <param> <key>center_freq26</key> <value>0</value> </param> <param> <key>gain26</key> <value>0</value> </param> <param> <key>ant26</key> <value></value> </param> <param> <key>bw26</key> <value>0</value> </param> <param> <key>center_freq27</key> <value>0</value> </param> <param> <key>gain27</key> <value>0</value> </param> <param> <key>ant27</key> <value></value> </param> <param> <key>bw27</key> <value>0</value> </param> <param> <key>center_freq28</key> <value>0</value> </param> <param> <key>gain28</key> <value>0</value> </param> <param> <key>ant28</key> <value></value> </param> <param> <key>bw28</key> <value>0</value> </param> <param> <key>center_freq29</key> <value>0</value> </param> <param> <key>gain29</key> <value>0</value> </param> <param> <key>ant29</key> <value></value> </param> <param> <key>bw29</key> <value>0</value> </param> <param> <key>center_freq30</key> <value>0</value> </param> <param> <key>gain30</key> <value>0</value> </param> <param> <key>ant30</key> <value></value> </param> <param> <key>bw30</key> <value>0</value> </param> <param> <key>center_freq31</key> <value>0</value> </param> <param> <key>gain31</key> <value>0</value> </param> <param> <key>ant31</key> <value></value> </param> <param> <key>bw31</key> <value>0</value> </param> <param> <key>_coordinate</key> <value>(669, 178)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>parameter</key> <param> <key>id</key> <value>rx_gain</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Default RX Gain</value> </param> <param> <key>value</key> <value>0</value> </param> <param> <key>type</key> <value>eng_float</value> </param> <param> <key>short_id</key> <value></value> </param> <param> <key>_coordinate</key> <value>(1139, 12)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_slider</key> <param> <key>id</key> <value>tone1</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Tone 1</value> </param> <param> <key>value</key> <value>50e3</value> </param> <param> <key>min</key> <value>-samp_rate/2</value> </param> <param> <key>max</key> <value>samp_rate/2</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, 0, 1, 4</value> </param> <param> <key>notebook</key> <value></value> </param> <param> <key>_coordinate</key> <value>(161, 484)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_slider</key> <param> <key>id</key> <value>tone2</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Tone 2</value> </param> <param> <key>value</key> <value>75e3</value> </param> <param> <key>min</key> <value>-samp_rate/2</value> </param> <param> <key>max</key> <value>samp_rate/2</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, 4, 1, 4</value> </param> <param> <key>notebook</key> <value></value> </param> <param> <key>_coordinate</key> <value>(308, 483)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_slider</key> <param> <key>id</key> <value>tun_tx_gain</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>UHD TX Gain</value> </param> <param> <key>value</key> <value>tx_gain</value> </param> <param> <key>min</key> <value>0</value> </param> <param> <key>max</key> <value>20</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>(655, 486)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_slider</key> <param> <key>id</key> <value>tun_freq</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>Freq (Hz)</value> </param> <param> <key>value</key> <value>freq</value> </param> <param> <key>min</key> <value>2.4e9</value> </param> <param> <key>max</key> <value>2.5e9</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>(514, 487)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_slider</key> <param> <key>id</key> <value>tun_rx_gain</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>label</key> <value>UHD RX Gain</value> </param> <param> <key>value</key> <value>rx_gain</value> </param> <param> <key>min</key> <value>0</value> </param> <param> <key>max</key> <value>20</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>(781, 487)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>uhd_usrp_source</key> <param> <key>id</key> <value>uhd_usrp_source_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>complex</value> </param> <param> <key>dev_addr</key> <value>address1</value> </param> <param> <key>sync</key> <value></value> </param> <param> <key>clock_rate</key> <value>0.0</value> </param> <param> <key>num_mboards</key> <value>1</value> </param> <param> <key>ref_source0</key> <value></value> </param> <param> <key>sd_spec0</key> <value></value> </param> <param> <key>ref_source1</key> <value></value> </param> <param> <key>sd_spec1</key> <value></value> </param> <param> <key>ref_source2</key> <value></value> </param> <param> <key>sd_spec2</key> <value></value> </param> <param> <key>ref_source3</key> <value></value> </param> <param> <key>sd_spec3</key> <value></value> </param> <param> <key>ref_source4</key> <value></value> </param> <param> <key>sd_spec4</key> <value></value> </param> <param> <key>ref_source5</key> <value></value> </param> <param> <key>sd_spec5</key> <value></value> </param> <param> <key>ref_source6</key> <value></value> </param> <param> <key>sd_spec6</key> <value></value> </param> <param> <key>ref_source7</key> <value></value> </param> <param> <key>sd_spec7</key> <value></value> </param> <param> <key>nchan</key> <value>1</value> </param> <param> <key>samp_rate</key> <value>samp_rate</value> </param> <param> <key>center_freq0</key> <value>tun_freq</value> </param> <param> <key>gain0</key> <value>tun_rx_gain</value> </param> <param> <key>ant0</key> <value></value> </param> <param> <key>bw0</key> <value>0</value> </param> <param> <key>center_freq1</key> <value>0</value> </param> <param> <key>gain1</key> <value>0</value> </param> <param> <key>ant1</key> <value></value> </param> <param> <key>bw1</key> <value>0</value> </param> <param> <key>center_freq2</key> <value>0</value> </param> <param> <key>gain2</key> <value>0</value> </param> <param> <key>ant2</key> <value></value> </param> <param> <key>bw2</key> <value>0</value> </param> <param> <key>center_freq3</key> <value>0</value> </param> <param> <key>gain3</key> <value>0</value> </param> <param> <key>ant3</key> <value></value> </param> <param> <key>bw3</key> <value>0</value> </param> <param> <key>center_freq4</key> <value>0</value> </param> <param> <key>gain4</key> <value>0</value> </param> <param> <key>ant4</key> <value></value> </param> <param> <key>bw4</key> <value>0</value> </param> <param> <key>center_freq5</key> <value>0</value> </param> <param> <key>gain5</key> <value>0</value> </param> <param> <key>ant5</key> <value></value> </param> <param> <key>bw5</key> <value>0</value> </param> <param> <key>center_freq6</key> <value>0</value> </param> <param> <key>gain6</key> <value>0</value> </param> <param> <key>ant6</key> <value></value> </param> <param> <key>bw6</key> <value>0</value> </param> <param> <key>center_freq7</key> <value>0</value> </param> <param> <key>gain7</key> <value>0</value> </param> <param> <key>ant7</key> <value></value> </param> <param> <key>bw7</key> <value>0</value> </param> <param> <key>center_freq8</key> <value>0</value> </param> <param> <key>gain8</key> <value>0</value> </param> <param> <key>ant8</key> <value></value> </param> <param> <key>bw8</key> <value>0</value> </param> <param> <key>center_freq9</key> <value>0</value> </param> <param> <key>gain9</key> <value>0</value> </param> <param> <key>ant9</key> <value></value> </param> <param> <key>bw9</key> <value>0</value> </param> <param> <key>center_freq10</key> <value>0</value> </param> <param> <key>gain10</key> <value>0</value> </param> <param> <key>ant10</key> <value></value> </param> <param> <key>bw10</key> <value>0</value> </param> <param> <key>center_freq11</key> <value>0</value> </param> <param> <key>gain11</key> <value>0</value> </param> <param> <key>ant11</key> <value></value> </param> <param> <key>bw11</key> <value>0</value> </param> <param> <key>center_freq12</key> <value>0</value> </param> <param> <key>gain12</key> <value>0</value> </param> <param> <key>ant12</key> <value></value> </param> <param> <key>bw12</key> <value>0</value> </param> <param> <key>center_freq13</key> <value>0</value> </param> <param> <key>gain13</key> <value>0</value> </param> <param> <key>ant13</key> <value></value> </param> <param> <key>bw13</key> <value>0</value> </param> <param> <key>center_freq14</key> <value>0</value> </param> <param> <key>gain14</key> <value>0</value> </param> <param> <key>ant14</key> <value></value> </param> <param> <key>bw14</key> <value>0</value> </param> <param> <key>center_freq15</key> <value>0</value> </param> <param> <key>gain15</key> <value>0</value> </param> <param> <key>ant15</key> <value></value> </param> <param> <key>bw15</key> <value>0</value> </param> <param> <key>center_freq16</key> <value>0</value> </param> <param> <key>gain16</key> <value>0</value> </param> <param> <key>ant16</key> <value></value> </param> <param> <key>bw16</key> <value>0</value> </param> <param> <key>center_freq17</key> <value>0</value> </param> <param> <key>gain17</key> <value>0</value> </param> <param> <key>ant17</key> <value></value> </param> <param> <key>bw17</key> <value>0</value> </param> <param> <key>center_freq18</key> <value>0</value> </param> <param> <key>gain18</key> <value>0</value> </param> <param> <key>ant18</key> <value></value> </param> <param> <key>bw18</key> <value>0</value> </param> <param> <key>center_freq19</key> <value>0</value> </param> <param> <key>gain19</key> <value>0</value> </param> <param> <key>ant19</key> <value></value> </param> <param> <key>bw19</key> <value>0</value> </param> <param> <key>center_freq20</key> <value>0</value> </param> <param> <key>gain20</key> <value>0</value> </param> <param> <key>ant20</key> <value></value> </param> <param> <key>bw20</key> <value>0</value> </param> <param> <key>center_freq21</key> <value>0</value> </param> <param> <key>gain21</key> <value>0</value> </param> <param> <key>ant21</key> <value></value> </param> <param> <key>bw21</key> <value>0</value> </param> <param> <key>center_freq22</key> <value>0</value> </param> <param> <key>gain22</key> <value>0</value> </param> <param> <key>ant22</key> <value></value> </param> <param> <key>bw22</key> <value>0</value> </param> <param> <key>center_freq23</key> <value>0</value> </param> <param> <key>gain23</key> <value>0</value> </param> <param> <key>ant23</key> <value></value> </param> <param> <key>bw23</key> <value>0</value> </param> <param> <key>center_freq24</key> <value>0</value> </param> <param> <key>gain24</key> <value>0</value> </param> <param> <key>ant24</key> <value></value> </param> <param> <key>bw24</key> <value>0</value> </param> <param> <key>center_freq25</key> <value>0</value> </param> <param> <key>gain25</key> <value>0</value> </param> <param> <key>ant25</key> <value></value> </param> <param> <key>bw25</key> <value>0</value> </param> <param> <key>center_freq26</key> <value>0</value> </param> <param> <key>gain26</key> <value>0</value> </param> <param> <key>ant26</key> <value></value> </param> <param> <key>bw26</key> <value>0</value> </param> <param> <key>center_freq27</key> <value>0</value> </param> <param> <key>gain27</key> <value>0</value> </param> <param> <key>ant27</key> <value></value> </param> <param> <key>bw27</key> <value>0</value> </param> <param> <key>center_freq28</key> <value>0</value> </param> <param> <key>gain28</key> <value>0</value> </param> <param> <key>ant28</key> <value></value> </param> <param> <key>bw28</key> <value>0</value> </param> <param> <key>center_freq29</key> <value>0</value> </param> <param> <key>gain29</key> <value>0</value> 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<sink_key>0</sink_key> </connection> <connection> <source_block_id>uhd_usrp_source_0</source_block_id> <sink_block_id>wxgui_fftsink2</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> </flow_graph>