diff options
Diffstat (limited to 'gr-noaa/apps/usrp_rx_hrpt.grc')
| -rw-r--r-- | gr-noaa/apps/usrp_rx_hrpt.grc | 718 |
1 files changed, 457 insertions, 261 deletions
diff --git a/gr-noaa/apps/usrp_rx_hrpt.grc b/gr-noaa/apps/usrp_rx_hrpt.grc index c8e099611..8edc2b4ea 100644 --- a/gr-noaa/apps/usrp_rx_hrpt.grc +++ b/gr-noaa/apps/usrp_rx_hrpt.grc @@ -1,6 +1,6 @@ <?xml version='1.0' encoding='ASCII'?> <flow_graph> - <timestamp>Sun Sep 20 12:45:30 2009</timestamp> + <timestamp>Sun Sep 20 19:09:57 2009</timestamp> <block> <key>options</key> <param> @@ -76,22 +76,34 @@ </param> </block> <block> - <key>variable</key> + <key>notebook</key> <param> <key>id</key> - <value>decim</value> + <value>displays</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>value</key> - <value>16</value> + <key>style</key> + <value>wx.NB_TOP</value> + </param> + <param> + <key>labels</key> + <value>['RX','PLL/SYNC']</value> + </param> + <param> + <key>grid_pos</key> + <value>1, 0, 1, 2</value> + </param> + <param> + <key>notebook</key> + <value></value> </param> <param> <key>_coordinate</key> - <value>(186, 10)</value> + <value>(9, 99)</value> </param> <param> <key>_rotation</key> @@ -99,22 +111,30 @@ </param> </block> <block> - <key>variable</key> + <key>gr_file_sink</key> <param> <key>id</key> - <value>hs</value> + <value>gr_file_sink_1</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>value</key> - <value>int(sps/2.0)</value> + <key>file</key> + <value>frames.dat</value> + </param> + <param> + <key>type</key> + <value>short</value> + </param> + <param> + <key>vlen</key> + <value>1</value> </param> <param> <key>_coordinate</key> - <value>(589, 13)</value> + <value>(1253, 805)</value> </param> <param> <key>_rotation</key> @@ -122,22 +142,18 @@ </param> </block> <block> - <key>variable</key> + <key>noaa_hrpt_deframer</key> <param> <key>id</key> - <value>sym_rate</value> + <value>noaa_hrpt_deframer_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>value</key> - <value>600*1109</value> - </param> - <param> <key>_coordinate</key> - <value>(383, 7)</value> + <value>(1063, 809)</value> </param> <param> <key>_rotation</key> @@ -145,45 +161,93 @@ </param> </block> <block> - <key>variable</key> + <key>wxgui_scopesink2</key> <param> <key>id</key> - <value>sps</value> + <value>wxgui_scopesink2_0_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>value</key> - <value>sample_rate/sym_rate</value> + <key>type</key> + <value>float</value> + </param> + <param> + <key>title</key> + <value>Post-PLL</value> + </param> + <param> + <key>samp_rate</key> + <value>sample_rate</value> + </param> + <param> + <key>v_scale</key> + <value>0.5</value> + </param> + <param> + <key>t_scale</key> + <value>20.0/sample_rate</value> + </param> + <param> + <key>ac_couple</key> + <value>False</value> + </param> + <param> + <key>xy_mode</key> + <value>False</value> + </param> + <param> + <key>num_inputs</key> + <value>1</value> + </param> + <param> + <key>grid_pos</key> + <value>0, 0, 1, 1</value> + </param> + <param> + <key>notebook</key> + <value>displays, 1</value> </param> <param> <key>_coordinate</key> - <value>(479, 11)</value> + <value>(597, 618)</value> </param> <param> <key>_rotation</key> - <value>0</value> + <value>180</value> </param> </block> <block> - <key>variable</key> + <key>gr_moving_average_xx</key> <param> <key>id</key> - <value>sample_rate</value> + <value>matched_filter</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>value</key> - <value>64e6/decim</value> + <key>type</key> + <value>complex</value> + </param> + <param> + <key>length</key> + <value>hs</value> + </param> + <param> + <key>scale</key> + <value>1.0/hs</value> + </param> + <param> + <key>max_iter</key> + <value>4000</value> </param> <param> <key>_coordinate</key> - <value>(273, 9)</value> + <value>(429, 789)</value> </param> <param> <key>_rotation</key> @@ -191,54 +255,58 @@ </param> </block> <block> - <key>variable_slider</key> + <key>wxgui_scopesink2</key> <param> <key>id</key> - <value>pll_alpha</value> + <value>wxgui_scopesink2_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>label</key> - <value>PLL Alpha</value> + <key>type</key> + <value>complex</value> </param> <param> - <key>value</key> - <value>0.001</value> + <key>title</key> + <value>RX Waveform</value> </param> <param> - <key>min</key> - <value>0.0</value> + <key>samp_rate</key> + <value>sample_rate</value> </param> <param> - <key>max</key> - <value>0.5</value> + <key>v_scale</key> + <value>0</value> </param> <param> - <key>num_steps</key> - <value>500</value> + <key>t_scale</key> + <value>20.0/sample_rate</value> </param> <param> - <key>style</key> - <value>wx.SL_HORIZONTAL</value> + <key>ac_couple</key> + <value>False</value> </param> <param> - <key>converver</key> - <value>float_converter</value> + <key>xy_mode</key> + <value>False</value> + </param> + <param> + <key>num_inputs</key> + <value>1</value> </param> <param> <key>grid_pos</key> - <value>0, 0, 1, 1</value> + <value>1, 0, 1, 1</value> </param> <param> <key>notebook</key> - <value></value> + <value>displays, 0</value> </param> <param> <key>_coordinate</key> - <value>(192, 100)</value> + <value>(430, 895)</value> </param> <param> <key>_rotation</key> @@ -246,80 +314,78 @@ </param> </block> <block> - <key>variable</key> + <key>wxgui_fftsink2</key> <param> <key>id</key> - <value>max_carrier_offset</value> + <value>rx_fftsink</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>value</key> - <value>2*math.pi*100e3/sample_rate</value> + <key>type</key> + <value>complex</value> </param> <param> - <key>_coordinate</key> - <value>(671, 14)</value> + <key>title</key> + <value>RX Spectrum</value> </param> <param> - <key>_rotation</key> - <value>0</value> + <key>samp_rate</key> + <value>sample_rate</value> </param> - </block> - <block> - <key>variable</key> <param> - <key>id</key> - <value>max_sync_offset</value> + <key>baseband_freq</key> + <value>1698e6</value> </param> <param> - <key>_enabled</key> - <value>True</value> + <key>y_per_div</key> + <value>5</value> </param> <param> - <key>value</key> - <value>0.01</value> + <key>y_divs</key> + <value>8</value> </param> <param> - <key>_coordinate</key> - <value>(805, 13)</value> + <key>ref_level</key> + <value>-5</value> </param> <param> - <key>_rotation</key> - <value>0</value> + <key>ref_scale</key> + <value>2.0</value> </param> - </block> - <block> - <key>notebook</key> <param> - <key>id</key> - <value>displays</value> + <key>fft_size</key> + <value>1024</value> </param> <param> - <key>_enabled</key> - <value>True</value> + <key>fft_rate</key> + <value>30</value> </param> <param> - <key>style</key> - <value>wx.NB_TOP</value> + <key>peak_hold</key> + <value>False</value> </param> <param> - <key>labels</key> - <value>['RX','PLL/SYNC']</value> + <key>average</key> + <value>True</value> + </param> + <param> + <key>avg_alpha</key> + <value>0.1</value> </param> <param> <key>grid_pos</key> - <value>1, 0, 1, 2</value> + <value>0, 0, 1, 1</value> </param> <param> <key>notebook</key> - <value></value> + <value>displays, 0</value> </param> <param> <key>_coordinate</key> - <value>(9, 99)</value> + <value>(430, 531)</value> </param> <param> <key>_rotation</key> @@ -327,18 +393,38 @@ </param> </block> <block> - <key>noaa_hrpt_deframer</key> + <key>gr_agc_xx</key> <param> <key>id</key> - <value>noaa_hrpt_deframer_0</value> + <value>agr</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> + <key>type</key> + <value>complex</value> + </param> + <param> + <key>rate</key> + <value>1e-6</value> + </param> + <param> + <key>reference</key> + <value>1.0</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>(1112, 649)</value> + <value>(258, 781)</value> </param> <param> <key>_rotation</key> @@ -346,89 +432,92 @@ </param> </block> <block> - <key>wxgui_scopesink2</key> + <key>virtual_source</key> <param> <key>id</key> - <value>wxgui_scopesink2_0_0</value> + <value>virtual_source_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>type</key> - <value>float</value> - </param> - <param> - <key>title</key> - <value>Post-PLL</value> + <key>stream_id</key> + <value>samples</value> </param> <param> - <key>samp_rate</key> - <value>sample_rate</value> + <key>_coordinate</key> + <value>(62, 805)</value> </param> <param> - <key>v_scale</key> - <value>0.5</value> + <key>_rotation</key> + <value>0</value> </param> + </block> + <block> + <key>parameter</key> <param> - <key>t_scale</key> - <value>20.0/sample_rate</value> + <key>id</key> + <value>filename</value> </param> <param> - <key>ac_couple</key> - <value>False</value> + <key>_enabled</key> + <value>True</value> </param> <param> - <key>xy_mode</key> - <value>False</value> + <key>label</key> + <value>Filename</value> </param> <param> - <key>num_inputs</key> - <value>1</value> + <key>value</key> + <value>""</value> </param> <param> - <key>grid_pos</key> - <value>0, 0, 1, 1</value> + <key>type</key> + <value>string</value> </param> <param> - <key>notebook</key> - <value>displays, 1</value> + <key>short_id</key> + <value>f</value> </param> <param> <key>_coordinate</key> - <value>(624, 462)</value> + <value>(200, 101)</value> </param> <param> <key>_rotation</key> - <value>180</value> + <value>0</value> </param> </block> <block> - <key>gr_throttle</key> + <key>parameter</key> <param> <key>id</key> - <value>throttle</value> + <value>decim</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>type</key> - <value>complex</value> + <key>label</key> + <value>Decimation</value> </param> <param> - <key>samples_per_second</key> - <value>sample_rate</value> + <key>value</key> + <value>16</value> </param> <param> - <key>vlen</key> - <value>1</value> + <key>type</key> + <value>intx</value> + </param> + <param> + <key>short_id</key> + <value>d</value> </param> <param> <key>_coordinate</key> - <value>(85, 645)</value> + <value>(304, 101)</value> </param> <param> <key>_rotation</key> @@ -436,78 +525,68 @@ </param> </block> <block> - <key>wxgui_fftsink2</key> + <key>variable</key> <param> <key>id</key> - <value>rx_fftsink</value> + <value>max_sync_offset</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>type</key> - <value>complex</value> - </param> - <param> - <key>title</key> - <value>RX Spectrum</value> - </param> - <param> - <key>samp_rate</key> - <value>sample_rate</value> + <key>value</key> + <value>0.01</value> </param> <param> - <key>baseband_freq</key> - <value>1698e6</value> + <key>_coordinate</key> + <value>(705, 19)</value> </param> <param> - <key>y_per_div</key> - <value>5</value> + <key>_rotation</key> + <value>0</value> </param> + </block> + <block> + <key>variable</key> <param> - <key>y_divs</key> - <value>8</value> + <key>id</key> + <value>max_carrier_offset</value> </param> <param> - <key>ref_level</key> - <value>-5</value> + <key>_enabled</key> + <value>True</value> </param> <param> - <key>ref_scale</key> - <value>2.0</value> + <key>value</key> + <value>2*math.pi*100e3/sample_rate</value> </param> <param> - <key>fft_size</key> - <value>1024</value> + <key>_coordinate</key> + <value>(575, 19)</value> </param> <param> - <key>fft_rate</key> - <value>30</value> + <key>_rotation</key> + <value>0</value> </param> + </block> + <block> + <key>variable</key> <param> - <key>peak_hold</key> - <value>False</value> + <key>id</key> + <value>hs</value> </param> <param> - <key>average</key> + <key>_enabled</key> <value>True</value> </param> <param> - <key>avg_alpha</key> - <value>0.1</value> - </param> - <param> - <key>grid_pos</key> - <value>0, 0, 1, 1</value> - </param> - <param> - <key>notebook</key> - <value>displays, 0</value> + <key>value</key> + <value>int(sps/2.0)</value> </param> <param> <key>_coordinate</key> - <value>(439, 309)</value> + <value>(499, 19)</value> </param> <param> <key>_rotation</key> @@ -515,58 +594,68 @@ </param> </block> <block> - <key>wxgui_scopesink2</key> + <key>variable</key> <param> <key>id</key> - <value>wxgui_scopesink2_0</value> + <value>sps</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>type</key> - <value>complex</value> + <key>value</key> + <value>sample_rate/sym_rate</value> </param> <param> - <key>title</key> - <value>RX Waveform</value> + <key>_coordinate</key> + <value>(397, 19)</value> </param> <param> - <key>samp_rate</key> - <value>sample_rate</value> + <key>_rotation</key> + <value>0</value> </param> + </block> + <block> + <key>variable</key> <param> - <key>v_scale</key> - <value>0</value> + <key>id</key> + <value>sym_rate</value> </param> <param> - <key>t_scale</key> - <value>20.0/sample_rate</value> + <key>_enabled</key> + <value>True</value> </param> <param> - <key>ac_couple</key> - <value>False</value> + <key>value</key> + <value>600*1109</value> </param> <param> - <key>xy_mode</key> - <value>False</value> + <key>_coordinate</key> + <value>(301, 19)</value> </param> <param> - <key>num_inputs</key> - <value>1</value> + <key>_rotation</key> + <value>0</value> </param> + </block> + <block> + <key>variable</key> <param> - <key>grid_pos</key> - <value>1, 0, 1, 1</value> + <key>id</key> + <value>sample_rate</value> </param> <param> - <key>notebook</key> - <value>displays, 0</value> + <key>_enabled</key> + <value>True</value> + </param> + <param> + <key>value</key> + <value>64e6/decim</value> </param> <param> <key>_coordinate</key> - <value>(440, 783)</value> + <value>(198, 17)</value> </param> <param> <key>_rotation</key> @@ -574,38 +663,54 @@ </param> </block> <block> - <key>gr_agc_xx</key> + <key>variable_slider</key> <param> <key>id</key> - <value>agr</value> + <value>pll_alpha</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>type</key> - <value>complex</value> + <key>label</key> + <value>PLL Alpha</value> </param> <param> - <key>rate</key> - <value>1e-6</value> + <key>value</key> + <value>0.005</value> </param> <param> - <key>reference</key> - <value>1.0</value> + <key>min</key> + <value>0.0</value> </param> <param> - <key>gain</key> - <value>1.0</value> + <key>max</key> + <value>0.5</value> </param> <param> - <key>max_gain</key> - <value>1.0</value> + <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>0, 0, 1, 1</value> + </param> + <param> + <key>notebook</key> + <value></value> </param> <param> <key>_coordinate</key> - <value>(267, 621)</value> + <value>(447, 99)</value> </param> <param> <key>_rotation</key> @@ -636,7 +741,7 @@ </param> <param> <key>_coordinate</key> - <value>(645, 629)</value> + <value>(624, 789)</value> </param> <param> <key>_rotation</key> @@ -644,30 +749,34 @@ </param> </block> <block> - <key>gr_file_sink</key> + <key>noaa_hrpt_sync_fb</key> <param> <key>id</key> - <value>gr_file_sink_1</value> + <value>noaa_hrpt_sync_fb_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>file</key> - <value>frames.dat</value> + <key>alpha</key> + <value>sync_alpha</value> </param> <param> - <key>type</key> - <value>short</value> + <key>beta</key> + <value>sync_alpha**2/4.0</value> </param> <param> - <key>vlen</key> - <value>1</value> + <key>sps</key> + <value>sps</value> + </param> + <param> + <key>max_offset</key> + <value>max_sync_offset</value> </param> <param> <key>_coordinate</key> - <value>(1125, 758)</value> + <value>(832, 781)</value> </param> <param> <key>_rotation</key> @@ -675,34 +784,54 @@ </param> </block> <block> - <key>gr_moving_average_xx</key> + <key>variable_slider</key> <param> <key>id</key> - <value>matched_filter</value> + <value>sync_alpha</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>type</key> - <value>complex</value> + <key>label</key> + <value>SYNC Alpha</value> </param> <param> - <key>length</key> - <value>hs</value> + <key>value</key> + <value>0.1</value> </param> <param> - <key>scale</key> - <value>1.0/hs</value> + <key>min</key> + <value>0.0</value> </param> <param> - <key>max_iter</key> - <value>4000</value> + <key>max</key> + <value>0.5</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>0, 1, 1, 1</value> + </param> + <param> + <key>notebook</key> + <value></value> </param> <param> <key>_coordinate</key> - <value>(444, 629)</value> + <value>(593, 98)</value> </param> <param> <key>_rotation</key> @@ -713,7 +842,7 @@ <key>gr_file_source</key> <param> <key>id</key> - <value>src</value> + <value>gr_file_source_0</value> </param> <param> <key>_enabled</key> @@ -721,11 +850,11 @@ </param> <param> <key>file</key> - <value>poes-d16.dat</value> + <value>filename</value> </param> <param> <key>type</key> - <value>complex</value> + <value>short</value> </param> <param> <key>repeat</key> @@ -737,7 +866,7 @@ </param> <param> <key>_coordinate</key> - <value>(79, 541)</value> + <value>(102, 368)</value> </param> <param> <key>_rotation</key> @@ -745,34 +874,53 @@ </param> </block> <block> - <key>noaa_hrpt_sync_fb</key> + <key>virtual_sink</key> <param> <key>id</key> - <value>noaa_hrpt_sync_fb_0</value> + <value>virtual_sink_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>alpha</key> - <value>sync_alpha</value> + <key>stream_id</key> + <value>samples</value> </param> <param> - <key>beta</key> - <value>sync_alpha**2/4.0</value> + <key>_coordinate</key> + <value>(1076, 376)</value> </param> <param> - <key>sps</key> - <value>sps</value> + <key>_rotation</key> + <value>0</value> </param> + </block> + <block> + <key>gr_throttle</key> <param> - <key>max_offset</key> - <value>max_sync_offset</value> + <key>id</key> + <value>throttle</value> + </param> + <param> + <key>_enabled</key> + <value>True</value> + </param> + <param> + <key>type</key> + <value>complex</value> + </param> + <param> + <key>samples_per_second</key> + <value>sample_rate</value> + </param> + <param> + <key>vlen</key> + <value>1</value> </param> <param> <key>_coordinate</key> - <value>(862, 621)</value> + <value>(877, 376)</value> </param> <param> <key>_rotation</key> @@ -780,54 +928,72 @@ </param> </block> <block> - <key>variable_slider</key> + <key>gr_deinterleave</key> <param> <key>id</key> - <value>sync_alpha</value> + <value>gr_deinterleave_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> - <key>label</key> - <value>SYNC Alpha</value> + <key>type</key> + <value>float</value> </param> <param> - <key>value</key> - <value>0.005</value> + <key>num_streams</key> + <value>2</value> </param> <param> - <key>min</key> - <value>0.0</value> + <key>vlen</key> + <value>1</value> </param> <param> - <key>max</key> - <value>0.5</value> + <key>_coordinate</key> + <value>(466, 363)</value> </param> <param> - <key>num_steps</key> - <value>500</value> + <key>_rotation</key> + <value>0</value> </param> + </block> + <block> + <key>gr_short_to_float</key> <param> - <key>style</key> - <value>wx.SL_HORIZONTAL</value> + <key>id</key> + <value>gr_short_to_float_0</value> </param> <param> - <key>converver</key> - <value>float_converter</value> + <key>_enabled</key> + <value>True</value> </param> <param> - <key>grid_pos</key> - <value>0, 1, 1, 1</value> + <key>_coordinate</key> + <value>(278, 380)</value> </param> <param> - <key>notebook</key> - <value></value> + <key>_rotation</key> + <value>0</value> + </param> + </block> + <block> + <key>gr_float_to_complex</key> + <param> + <key>id</key> + <value>gr_float_to_complex_0</value> + </param> + <param> + <key>_enabled</key> + <value>True</value> + </param> + <param> + <key>vlen</key> + <value>1</value> </param> <param> <key>_coordinate</key> - <value>(344, 101)</value> + <value>(653, 363)</value> </param> <param> <key>_rotation</key> @@ -835,6 +1001,12 @@ </param> </block> <connection> + <source_block_id>virtual_source_0</source_block_id> + <sink_block_id>agr</sink_block_id> + <source_key>0</source_key> + <sink_key>0</sink_key> + </connection> + <connection> <source_block_id>noaa_hrpt_deframer_0</source_block_id> <sink_block_id>gr_file_sink_1</sink_block_id> <source_key>0</source_key> @@ -871,26 +1043,50 @@ <sink_key>0</sink_key> </connection> <connection> - <source_block_id>throttle</source_block_id> - <sink_block_id>agr</sink_block_id> + <source_block_id>agr</source_block_id> + <sink_block_id>matched_filter</sink_block_id> + <source_key>0</source_key> + <sink_key>0</sink_key> + </connection> + <connection> + <source_block_id>matched_filter</source_block_id> + <sink_block_id>noaa_hrpt_pll_cf_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> - <source_block_id>src</source_block_id> + <source_block_id>gr_float_to_complex_0</source_block_id> <sink_block_id>throttle</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> - <source_block_id>agr</source_block_id> - <sink_block_id>matched_filter</sink_block_id> + <source_block_id>gr_short_to_float_0</source_block_id> + <sink_block_id>gr_deinterleave_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> - <source_block_id>matched_filter</source_block_id> - <sink_block_id>noaa_hrpt_pll_cf_0</sink_block_id> + <source_block_id>gr_deinterleave_0</source_block_id> + <sink_block_id>gr_float_to_complex_0</sink_block_id> + <source_key>1</source_key> + <sink_key>1</sink_key> + </connection> + <connection> + <source_block_id>gr_deinterleave_0</source_block_id> + <sink_block_id>gr_float_to_complex_0</sink_block_id> + <source_key>0</source_key> + <sink_key>0</sink_key> + </connection> + <connection> + <source_block_id>gr_file_source_0</source_block_id> + <sink_block_id>gr_short_to_float_0</sink_block_id> + <source_key>0</source_key> + <sink_key>0</sink_key> + </connection> + <connection> + <source_block_id>throttle</source_block_id> + <sink_block_id>virtual_sink_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> |