First step to add multichannel capability to the GSM receiver. At this moment it might still contain debuging code. The training sequence number for non C0 channels is embedded in the code.

1 files changed, 345 insertions, 345 deletions

diff --git a/examples/receiver_rtlsdr.grc b/examples/receiver_rtlsdr.grc
index d7d4ccb..fb249bb 100644
--- a/examples/receiver_rtlsdr.grc
+++ b/examples/receiver_rtlsdr.grc
@@ -1,6 +1,6 @@
 <?xml version='1.0' encoding='ASCII'?>
 <flow_graph>
-  <timestamp>Wed Aug 13 19:03:28 2014</timestamp>
+  <timestamp>Thu Aug 21 20:40:28 2014</timestamp>
   <block>
     <key>options</key>
     <param>
@@ -210,58 +210,38 @@
     </param>
   </block>
   <block>
-    <key>variable_qtgui_range</key>
+    <key>gsm_get_bcch_or_ccch_bursts</key>
     <param>
       <key>id</key>
-      <value>ppm</value>
+      <value>gsm_get_bcch_or_ccch_bursts_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>label</key>
-      <value>clock_correction</value>
-    </param>
-    <param>
-      <key>value</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>start</key>
-      <value>-50</value>
-    </param>
-    <param>
-      <key>stop</key>
-      <value>50</value>
-    </param>
-    <param>
-      <key>step</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>widget</key>
-      <value>counter</value>
+      <key>d_fn51_start</key>
+      <value>2</value>
     </param>
     <param>
-      <key>orient</key>
-      <value>Qt.Horizontal</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>min_len</key>
-      <value>100</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>gui_hint</key>
-      <value></value>
+      <key>minoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>alias</key>
-      <value></value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(473, 10)</value>
+      <value>(660, 243)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -269,232 +249,176 @@
     </param>
   </block>
   <block>
-    <key>rtlsdr_source</key>
+    <key>blocks_tag_debug</key>
     <param>
       <key>id</key>
-      <value>rtlsdr_source_0</value>
+      <value>blocks_tag_debug_0</value>
     </param>
     <param>
       <key>_enabled</key>
-      <value>True</value>
+      <value>False</value>
     </param>
     <param>
       <key>type</key>
-      <value>fc32</value>
+      <value>complex</value>
     </param>
     <param>
-      <key>args</key>
+      <key>name</key>
       <value></value>
     </param>
     <param>
-      <key>nchan</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>sample_rate</key>
-      <value>samp_rate</value>
-    </param>
-    <param>
-      <key>freq0</key>
-      <value>fc</value>
-    </param>
-    <param>
-      <key>corr0</key>
-      <value>ppm</value>
+      <key>filter</key>
+      <value>""</value>
     </param>
     <param>
-      <key>dc_offset_mode0</key>
-      <value>0</value>
+      <key>num_inputs</key>
+      <value>1</value>
     </param>
     <param>
-      <key>iq_balance_mode0</key>
-      <value>0</value>
+      <key>vlen</key>
+      <value>1</value>
     </param>
     <param>
-      <key>gain_mode0</key>
+      <key>display</key>
       <value>True</value>
     </param>
     <param>
-      <key>gain0</key>
-      <value>g</value>
-    </param>
-    <param>
-      <key>if_gain0</key>
-      <value>20</value>
-    </param>
-    <param>
-      <key>bb_gain0</key>
-      <value>20</value>
-    </param>
-    <param>
-      <key>ant0</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>bw0</key>
-      <value>250e3</value>
-    </param>
-    <param>
-      <key>freq1</key>
-      <value>100e6</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>corr1</key>
-      <value>0</value>
+      <key>_coordinate</key>
+      <value>(456, 477)</value>
     </param>
     <param>
-      <key>dc_offset_mode1</key>
+      <key>_rotation</key>
       <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>gsm_receiver_hier</key>
     <param>
-      <key>iq_balance_mode1</key>
-      <value>0</value>
+      <key>id</key>
+      <value>gsm_receiver_hier_0</value>
     </param>
     <param>
-      <key>gain_mode1</key>
+      <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>gain1</key>
-      <value>10</value>
+      <key>input_rate</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>if_gain1</key>
-      <value>20</value>
+      <key>osr</key>
+      <value>4</value>
     </param>
     <param>
-      <key>bb_gain1</key>
-      <value>20</value>
+      <key>arfcn</key>
+      <value>0</value>
     </param>
     <param>
-      <key>ant1</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>bw1</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>freq2</key>
-      <value>100e6</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>corr2</key>
+      <key>minoutbuf</key>
       <value>0</value>
     </param>
     <param>
-      <key>dc_offset_mode2</key>
+      <key>maxoutbuf</key>
       <value>0</value>
     </param>
     <param>
-      <key>iq_balance_mode2</key>
-      <value>0</value>
+      <key>_coordinate</key>
+      <value>(455, 244)</value>
     </param>
     <param>
-      <key>gain_mode2</key>
-      <value>True</value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>gsm_control_channels_decoder</key>
     <param>
-      <key>gain2</key>
-      <value>10</value>
+      <key>id</key>
+      <value>gsm_control_channels_decoder_0</value>
     </param>
     <param>
-      <key>if_gain2</key>
-      <value>20</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>bb_gain2</key>
-      <value>20</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>ant2</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
-      <key>bw2</key>
+      <key>minoutbuf</key>
       <value>0</value>
     </param>
     <param>
-      <key>freq3</key>
-      <value>100e6</value>
-    </param>
-    <param>
-      <key>corr3</key>
+      <key>maxoutbuf</key>
       <value>0</value>
     </param>
     <param>
-      <key>dc_offset_mode3</key>
-      <value>0</value>
+      <key>_coordinate</key>
+      <value>(920, 247)</value>
     </param>
     <param>
-      <key>iq_balance_mode3</key>
+      <key>_rotation</key>
       <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>gsm_message_printer</key>
     <param>
-      <key>gain_mode3</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>gain3</key>
-      <value>10</value>
-    </param>
-    <param>
-      <key>if_gain3</key>
-      <value>20</value>
+      <key>id</key>
+      <value>gsm_message_printer_0</value>
     </param>
     <param>
-      <key>bb_gain3</key>
-      <value>20</value>
+      <key>_enabled</key>
+      <value>False</value>
     </param>
     <param>
-      <key>ant3</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>bw3</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>freq4</key>
-      <value>100e6</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>corr4</key>
-      <value>0</value>
+      <key>_coordinate</key>
+      <value>(1128, 169)</value>
     </param>
     <param>
-      <key>dc_offset_mode4</key>
+      <key>_rotation</key>
       <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>gsm_message_printer</key>
     <param>
-      <key>iq_balance_mode4</key>
-      <value>0</value>
+      <key>id</key>
+      <value>gsm_message_printer_1</value>
     </param>
     <param>
-      <key>gain_mode4</key>
+      <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>gain4</key>
-      <value>10</value>
-    </param>
-    <param>
-      <key>if_gain4</key>
-      <value>20</value>
-    </param>
-    <param>
-      <key>bb_gain4</key>
-      <value>20</value>
-    </param>
-    <param>
-      <key>ant4</key>
-      <value></value>
-    </param>
-    <param>
-      <key>bw4</key>
-      <value>0</value>
-    </param>
-    <param>
       <key>alias</key>
       <value></value>
     </param>
@@ -503,16 +427,8 @@
       <value></value>
     </param>
     <param>
-      <key>minoutbuf</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>maxoutbuf</key>
-      <value>0</value>
-    </param>
-    <param>
       <key>_coordinate</key>
-      <value>(4, 171)</value>
+      <value>(1141, 247)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -520,133 +436,85 @@
     </param>
   </block>
   <block>
-    <key>qtgui_sink_x</key>
+    <key>blocks_message_debug</key>
     <param>
       <key>id</key>
-      <value>qtgui_sink_x_0</value>
+      <value>blocks_message_debug_0</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>type</key>
-      <value>complex</value>
-    </param>
-    <param>
-      <key>name</key>
-      <value>""</value>
-    </param>
-    <param>
-      <key>fftsize</key>
-      <value>1024</value>
+      <key>alias</key>
+      <value></value>
     </param>
     <param>
-      <key>wintype</key>
-      <value>firdes.WIN_BLACKMAN_hARRIS</value>
+      <key>affinity</key>
+      <value></value>
     </param>
     <param>
-      <key>fc</key>
-      <value>fc</value>
+      <key>_coordinate</key>
+      <value>(240, 405)</value>
     </param>
     <param>
-      <key>bw</key>
-      <value>samp_rate</value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>variable_qtgui_range</key>
     <param>
-      <key>rate</key>
-      <value>10</value>
+      <key>id</key>
+      <value>ppm</value>
     </param>
     <param>
-      <key>showrf</key>
+      <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>plotfreq</key>
-      <value>True</value>
+      <key>label</key>
+      <value>clock_correction</value>
     </param>
     <param>
-      <key>plotwaterfall</key>
-      <value>True</value>
+      <key>value</key>
+      <value>84</value>
     </param>
     <param>
-      <key>plottime</key>
-      <value>True</value>
+      <key>start</key>
+      <value>-100</value>
     </param>
     <param>
-      <key>plotconst</key>
-      <value>True</value>
+      <key>stop</key>
+      <value>100</value>
     </param>
     <param>
-      <key>gui_hint</key>
-      <value></value>
+      <key>step</key>
+      <value>1</value>
     </param>
     <param>
-      <key>freqchangevar</key>
-      <value>None</value>
+      <key>widget</key>
+      <value>counter</value>
     </param>
     <param>
-      <key>showports</key>
-      <value>True</value>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
     </param>
     <param>
-      <key>alias</key>
-      <value></value>
+      <key>min_len</key>
+      <value>100</value>
     </param>
     <param>
-      <key>affinity</key>
+      <key>gui_hint</key>
       <value></value>
     </param>
     <param>
-      <key>minoutbuf</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>maxoutbuf</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(455, 374)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>gsm_get_bcch_or_ccch_bursts</key>
-    <param>
-      <key>id</key>
-      <value>gsm_get_bcch_or_ccch_bursts_0</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>d_fn51_start</key>
-      <value>2</value>
-    </param>
-    <param>
       <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>affinity</key>
-      <value></value>
-    </param>
-    <param>
-      <key>minoutbuf</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>maxoutbuf</key>
-      <value>0</value>
-    </param>
-    <param>
       <key>_coordinate</key>
-      <value>(660, 243)</value>
+      <value>(473, 10)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -748,141 +616,232 @@
     </param>
   </block>
   <block>
-    <key>blocks_tag_debug</key>
+    <key>rtlsdr_source</key>
     <param>
       <key>id</key>
-      <value>blocks_tag_debug_0</value>
+      <value>rtlsdr_source_0</value>
     </param>
     <param>
       <key>_enabled</key>
-      <value>False</value>
+      <value>True</value>
     </param>
     <param>
       <key>type</key>
-      <value>complex</value>
+      <value>fc32</value>
     </param>
     <param>
-      <key>name</key>
+      <key>args</key>
       <value></value>
     </param>
     <param>
-      <key>filter</key>
-      <value>""</value>
+      <key>nchan</key>
+      <value>1</value>
     </param>
     <param>
-      <key>num_inputs</key>
-      <value>1</value>
+      <key>sample_rate</key>
+      <value>samp_rate</value>
     </param>
     <param>
-      <key>vlen</key>
-      <value>1</value>
+      <key>freq0</key>
+      <value>fc</value>
     </param>
     <param>
-      <key>display</key>
+      <key>corr0</key>
+      <value>ppm</value>
+    </param>
+    <param>
+      <key>dc_offset_mode0</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>iq_balance_mode0</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>gain_mode0</key>
       <value>True</value>
     </param>
     <param>
-      <key>alias</key>
-      <value></value>
+      <key>gain0</key>
+      <value>g</value>
     </param>
     <param>
-      <key>affinity</key>
+      <key>if_gain0</key>
+      <value>20</value>
+    </param>
+    <param>
+      <key>bb_gain0</key>
+      <value>20</value>
+    </param>
+    <param>
+      <key>ant0</key>
       <value></value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(456, 477)</value>
+      <key>bw0</key>
+      <value>250e3</value>
     </param>
     <param>
-      <key>_rotation</key>
+      <key>freq1</key>
+      <value>100e6</value>
+    </param>
+    <param>
+      <key>corr1</key>
       <value>0</value>
     </param>
-  </block>
-  <block>
-    <key>gsm_receiver_hier</key>
     <param>
-      <key>id</key>
-      <value>gsm_receiver_hier_0</value>
+      <key>dc_offset_mode1</key>
+      <value>0</value>
     </param>
     <param>
-      <key>_enabled</key>
+      <key>iq_balance_mode1</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>gain_mode1</key>
       <value>True</value>
     </param>
     <param>
-      <key>input_rate</key>
-      <value>samp_rate</value>
+      <key>gain1</key>
+      <value>10</value>
     </param>
     <param>
-      <key>osr</key>
-      <value>4</value>
+      <key>if_gain1</key>
+      <value>20</value>
     </param>
     <param>
-      <key>arfcn</key>
-      <value>0</value>
+      <key>bb_gain1</key>
+      <value>20</value>
     </param>
     <param>
-      <key>alias</key>
+      <key>ant1</key>
       <value></value>
     </param>
     <param>
-      <key>affinity</key>
+      <key>bw1</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>freq2</key>
+      <value>100e6</value>
+    </param>
+    <param>
+      <key>corr2</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>dc_offset_mode2</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>iq_balance_mode2</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>gain_mode2</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>gain2</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>if_gain2</key>
+      <value>20</value>
+    </param>
+    <param>
+      <key>bb_gain2</key>
+      <value>20</value>
+    </param>
+    <param>
+      <key>ant2</key>
       <value></value>
     </param>
     <param>
-      <key>minoutbuf</key>
+      <key>bw2</key>
       <value>0</value>
     </param>
     <param>
-      <key>maxoutbuf</key>
+      <key>freq3</key>
+      <value>100e6</value>
+    </param>
+    <param>
+      <key>corr3</key>
       <value>0</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(455, 244)</value>
+      <key>dc_offset_mode3</key>
+      <value>0</value>
     </param>
     <param>
-      <key>_rotation</key>
+      <key>iq_balance_mode3</key>
       <value>0</value>
     </param>
-  </block>
-  <block>
-    <key>blocks_message_debug</key>
     <param>
-      <key>id</key>
-      <value>blocks_message_debug_0</value>
+      <key>gain_mode3</key>
+      <value>True</value>
     </param>
     <param>
-      <key>_enabled</key>
-      <value>False</value>
+      <key>gain3</key>
+      <value>10</value>
     </param>
     <param>
-      <key>alias</key>
-      <value></value>
+      <key>if_gain3</key>
+      <value>20</value>
     </param>
     <param>
-      <key>affinity</key>
+      <key>bb_gain3</key>
+      <value>20</value>
+    </param>
+    <param>
+      <key>ant3</key>
       <value></value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(240, 406)</value>
+      <key>bw3</key>
+      <value>0</value>
     </param>
     <param>
-      <key>_rotation</key>
+      <key>freq4</key>
+      <value>100e6</value>
+    </param>
+    <param>
+      <key>corr4</key>
       <value>0</value>
     </param>
-  </block>
-  <block>
-    <key>gsm_control_channels_decoder</key>
     <param>
-      <key>id</key>
-      <value>gsm_control_channels_decoder_0</value>
+      <key>dc_offset_mode4</key>
+      <value>0</value>
     </param>
     <param>
-      <key>_enabled</key>
+      <key>iq_balance_mode4</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>gain_mode4</key>
       <value>True</value>
     </param>
     <param>
+      <key>gain4</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>if_gain4</key>
+      <value>20</value>
+    </param>
+    <param>
+      <key>bb_gain4</key>
+      <value>20</value>
+    </param>
+    <param>
+      <key>ant4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>bw4</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>alias</key>
       <value></value>
     </param>
@@ -900,7 +859,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(920, 247)</value>
+      <value>(4, 171)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -908,40 +867,73 @@
     </param>
   </block>
   <block>
-    <key>gsm_message_printer</key>
+    <key>qtgui_sink_x</key>
     <param>
       <key>id</key>
-      <value>gsm_message_printer_0</value>
+      <value>qtgui_sink_x_0</value>
     </param>
     <param>
       <key>_enabled</key>
-      <value>False</value>
+      <value>True</value>
     </param>
     <param>
-      <key>alias</key>
-      <value></value>
+      <key>type</key>
+      <value>complex</value>
     </param>
     <param>
-      <key>affinity</key>
-      <value></value>
+      <key>name</key>
+      <value>""</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(1128, 169)</value>
+      <key>fftsize</key>
+      <value>1024</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>0</value>
+      <key>wintype</key>
+      <value>firdes.WIN_BLACKMAN_hARRIS</value>
     </param>
-  </block>
-  <block>
-    <key>gsm_message_printer</key>
     <param>
-      <key>id</key>
-      <value>gsm_message_printer_1</value>
+      <key>fc</key>
+      <value>fc</value>
     </param>
     <param>
-      <key>_enabled</key>
+      <key>bw</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>rate</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>showrf</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>plotfreq</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>plotwaterfall</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>plottime</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>plotconst</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value></value>
+    </param>
+    <param>
+      <key>freqchangevar</key>
+      <value>None</value>
+    </param>
+    <param>
+      <key>showports</key>
       <value>True</value>
     </param>
     <param>
@@ -953,8 +945,16 @@
       <value></value>
     </param>
     <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
       <key>_coordinate</key>
-      <value>(1141, 247)</value>
+      <value>(455, 374)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -974,12 +974,6 @@
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>clock_offset_corrector_0</source_block_id>
-    <sink_block_id>qtgui_sink_x_0</sink_block_id>
-    <source_key>0</source_key>
-    <sink_key>0</sink_key>
-  </connection>
-  <connection>
     <source_block_id>gsm_get_bcch_or_ccch_bursts_0</source_block_id>
     <sink_block_id>gsm_control_channels_decoder_0</sink_block_id>
     <source_key>bursts</source_key>
@@ -1004,6 +998,18 @@
     <sink_key>msgs</sink_key>
   </connection>
   <connection>
+    <source_block_id>gsm_control_channels_decoder_0</source_block_id>
+    <sink_block_id>gsm_message_printer_1</sink_block_id>
+    <source_key>msgs</source_key>
+    <sink_key>msgs</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>gsm_clock_offset_control_0</source_block_id>
+    <sink_block_id>blocks_message_debug_0</sink_block_id>
+    <source_key>ppm</source_key>
+    <sink_key>print</sink_key>
+  </connection>
+  <connection>
     <source_block_id>gsm_clock_offset_control_0</source_block_id>
     <sink_block_id>clock_offset_corrector_0</sink_block_id>
     <source_key>ppm</source_key>
@@ -1016,15 +1022,9 @@
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>gsm_receiver_hier_0</source_block_id>
-    <sink_block_id>blocks_message_debug_0</sink_block_id>
-    <source_key>measurements</source_key>
-    <sink_key>print</sink_key>
-  </connection>
-  <connection>
-    <source_block_id>gsm_control_channels_decoder_0</source_block_id>
-    <sink_block_id>gsm_message_printer_1</sink_block_id>
-    <source_key>msgs</source_key>
-    <sink_key>msgs</sink_key>
+    <source_block_id>rtlsdr_source_0</source_block_id>
+    <sink_block_id>qtgui_sink_x_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
   </connection>
 </flow_graph>