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[Commit-gnuradio] [gnuradio] 01/01: dtv: update ATSC receiver examples


From: git
Subject: [Commit-gnuradio] [gnuradio] 01/01: dtv: update ATSC receiver examples
Date: Tue, 22 Jul 2014 21:39:29 +0000 (UTC)

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jcorgan pushed a commit to branch master
in repository gnuradio.

commit 9c55ce22a4df62e910e0bee319c4ad7d363aaf89
Author: Johnathan Corgan <address@hidden>
Date:   Tue Jul 22 14:38:52 2014 -0700

    dtv: update ATSC receiver examples
    
    uhd_atsc_rx.grc: Live OTA to mpeg.ts
    
    uhd_atsc_capture.grc: Record raw ATSC RF to data file
    
    file_atsc_rx.grc: Replay raw ATSC RF capture to mpeg.ts
---
 gr-dtv/examples/file_atsc_rx.grc                   |  485 +++++++
 .../{uhd_rx_atsc_hier.grc => uhd_atsc_capture.grc} |  605 ++------
 gr-dtv/examples/uhd_rx_atsc_short.grc              | 1534 --------------------
 3 files changed, 583 insertions(+), 2041 deletions(-)

diff --git a/gr-dtv/examples/file_atsc_rx.grc b/gr-dtv/examples/file_atsc_rx.grc
new file mode 100644
index 0000000..c75f45d
--- /dev/null
+++ b/gr-dtv/examples/file_atsc_rx.grc
@@ -0,0 +1,485 @@
+<?xml version='1.0' encoding='ASCII'?>
+<flow_graph>
+  <timestamp>Tue Jul 22 14:34:09 2014</timestamp>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>atsc_sym_rate</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>4.5e6/286*684</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(94, 115)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>sample_rate</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>6.25e6</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(278, 200)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>duration</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>30</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(381, 198)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>gain</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>18</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(205, 200)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>freq</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>605e6</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(117, 201)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>antenna</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>"TX/RX"</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(27, 201)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>sps</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>1.1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(20, 115)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>oversampled_rate</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>atsc_sym_rate*sps</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(207, 115)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>options</key>
+    <param>
+      <key>id</key>
+      <value>file_atsc_rx</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>title</key>
+      <value>Receive ATSC from UHD</value>
+    </param>
+    <param>
+      <key>author</key>
+      <value></value>
+    </param>
+    <param>
+      <key>description</key>
+      <value></value>
+    </param>
+    <param>
+      <key>window_size</key>
+      <value>4000, 4000</value>
+    </param>
+    <param>
+      <key>generate_options</key>
+      <value>no_gui</value>
+    </param>
+    <param>
+      <key>category</key>
+      <value>Custom</value>
+    </param>
+    <param>
+      <key>run_options</key>
+      <value>run</value>
+    </param>
+    <param>
+      <key>run</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>max_nouts</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>realtime_scheduling</key>
+      <value></value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(11, 10)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_interleaved_short_to_complex</key>
+    <param>
+      <key>id</key>
+      <value>blocks_interleaved_short_to_complex_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>vector_input</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>swap</key>
+      <value>False</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>(206, 337)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>dtv_atsc_rx</key>
+    <param>
+      <key>id</key>
+      <value>dtv_atsc_rx_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>rate</key>
+      <value>sample_rate</value>
+    </param>
+    <param>
+      <key>sps</key>
+      <value>1.5</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>(398, 329)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_file_sink</key>
+    <param>
+      <key>id</key>
+      <value>blocks_file_sink_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>file</key>
+      <value>mpeg.ts</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>byte</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>unbuffered</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>append</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(605, 321)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_file_source</key>
+    <param>
+      <key>id</key>
+      <value>blocks_file_source_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>file</key>
+      <value>atsc_iq.sc16</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>short</value>
+    </param>
+    <param>
+      <key>repeat</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</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>(33, 329)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <connection>
+    <source_block_id>blocks_file_source_0</source_block_id>
+    <sink_block_id>blocks_interleaved_short_to_complex_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_interleaved_short_to_complex_0</source_block_id>
+    <sink_block_id>dtv_atsc_rx_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>dtv_atsc_rx_0</source_block_id>
+    <sink_block_id>blocks_file_sink_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+</flow_graph>
diff --git a/gr-dtv/examples/uhd_rx_atsc_hier.grc 
b/gr-dtv/examples/uhd_atsc_capture.grc
similarity index 68%
rename from gr-dtv/examples/uhd_rx_atsc_hier.grc
rename to gr-dtv/examples/uhd_atsc_capture.grc
index 7084d50..eb341bf 100644
--- a/gr-dtv/examples/uhd_rx_atsc_hier.grc
+++ b/gr-dtv/examples/uhd_atsc_capture.grc
@@ -1,6 +1,6 @@
 <?xml version='1.0' encoding='ASCII'?>
 <flow_graph>
-  <timestamp>Tue Jul 22 12:08:55 2014</timestamp>
+  <timestamp>Tue Jul 22 14:30:13 2014</timestamp>
   <block>
     <key>variable</key>
     <param>
@@ -32,7 +32,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>oversampled_rate</value>
+      <value>sample_rate</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -40,7 +40,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>atsc_sym_rate*sps</value>
+      <value>6.25e6</value>
     </param>
     <param>
       <key>alias</key>
@@ -48,7 +48,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(207, 115)</value>
+      <value>(278, 200)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -59,7 +59,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>sps</value>
+      <value>duration</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -67,58 +67,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>1.1</value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(20, 115)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>qtgui_tab_widget</key>
-    <param>
-      <key>id</key>
-      <value>displays</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>num_tabs</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>label0</key>
-      <value>RX Spectrum</value>
-    </param>
-    <param>
-      <key>label1</key>
-      <value>Baseband</value>
-    </param>
-    <param>
-      <key>label2</key>
-      <value></value>
-    </param>
-    <param>
-      <key>label3</key>
-      <value>Tab 3</value>
-    </param>
-    <param>
-      <key>label4</key>
-      <value>Tab 4</value>
-    </param>
-    <param>
-      <key>gui_hint</key>
-      <value>0,0,1,4</value>
+      <value>30</value>
     </param>
     <param>
       <key>alias</key>
@@ -126,7 +75,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(191, 28)</value>
+      <value>(381, 198)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -134,90 +83,18 @@
     </param>
   </block>
   <block>
-    <key>variable_qtgui_chooser</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>antenna</value>
+      <value>gain</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Antenna</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>string</value>
-    </param>
-    <param>
-      <key>num_opts</key>
-      <value>2</value>
-    </param>
-    <param>
       <key>value</key>
-      <value>TX/RX</value>
-    </param>
-    <param>
-      <key>options</key>
-      <value>[0, 1, 2]</value>
-    </param>
-    <param>
-      <key>labels</key>
-      <value>[]</value>
-    </param>
-    <param>
-      <key>option0</key>
-      <value>TX/RX</value>
-    </param>
-    <param>
-      <key>label0</key>
-      <value>TX/RX</value>
-    </param>
-    <param>
-      <key>option1</key>
-      <value>RX2</value>
-    </param>
-    <param>
-      <key>label1</key>
-      <value>RX2</value>
-    </param>
-    <param>
-      <key>option2</key>
-      <value>2</value>
-    </param>
-    <param>
-      <key>label2</key>
-      <value></value>
-    </param>
-    <param>
-      <key>option3</key>
-      <value>3</value>
-    </param>
-    <param>
-      <key>label3</key>
-      <value></value>
-    </param>
-    <param>
-      <key>option4</key>
-      <value>4</value>
-    </param>
-    <param>
-      <key>label4</key>
-      <value></value>
-    </param>
-    <param>
-      <key>widget</key>
-      <value>radio_buttons</value>
-    </param>
-    <param>
-      <key>orient</key>
-      <value>Qt.QVBoxLayout</value>
-    </param>
-    <param>
-      <key>gui_hint</key>
-      <value>1,0,1,1</value>
+      <value>18</value>
     </param>
     <param>
       <key>alias</key>
@@ -225,7 +102,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(342, 20)</value>
+      <value>(205, 200)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -233,30 +110,18 @@
     </param>
   </block>
   <block>
-    <key>variable_qtgui_entry</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>sample_rate</value>
+      <value>freq</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Sample Rate</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>real</value>
-    </param>
-    <param>
       <key>value</key>
-      <value>6.25e6</value>
-    </param>
-    <param>
-      <key>gui_hint</key>
-      <value>1,2,1,1</value>
+      <value>605e6</value>
     </param>
     <param>
       <key>alias</key>
@@ -264,7 +129,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(486, 104)</value>
+      <value>(117, 201)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -272,50 +137,18 @@
     </param>
   </block>
   <block>
-    <key>variable_qtgui_range</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>gain</value>
+      <value>antenna</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Gain</value>
-    </param>
-    <param>
       <key>value</key>
-      <value>18</value>
-    </param>
-    <param>
-      <key>start</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>stop</key>
-      <value>31</value>
-    </param>
-    <param>
-      <key>step</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>widget</key>
-      <value>counter_slider</value>
-    </param>
-    <param>
-      <key>orient</key>
-      <value>Qt.Horizontal</value>
-    </param>
-    <param>
-      <key>min_len</key>
-      <value>200</value>
-    </param>
-    <param>
-      <key>gui_hint</key>
-      <value>1,3,1,1</value>
+      <value>"TX/RX"</value>
     </param>
     <param>
       <key>alias</key>
@@ -323,7 +156,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(621, 20)</value>
+      <value>(27, 201)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -331,93 +164,18 @@
     </param>
   </block>
   <block>
-    <key>variable_qtgui_entry</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>freq</value>
+      <value>sps</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>label</key>
-      <value>Frequency</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>real</value>
-    </param>
-    <param>
       <key>value</key>
-      <value>605e6</value>
-    </param>
-    <param>
-      <key>gui_hint</key>
-      <value>1,1,1,1</value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(487, 18)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>options</key>
-    <param>
-      <key>id</key>
-      <value>uhd_rx_atsc_hier</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>title</key>
-      <value>Receive ATSC from UHD</value>
-    </param>
-    <param>
-      <key>author</key>
-      <value></value>
-    </param>
-    <param>
-      <key>description</key>
-      <value></value>
-    </param>
-    <param>
-      <key>window_size</key>
-      <value>4000, 4000</value>
-    </param>
-    <param>
-      <key>generate_options</key>
-      <value>qt_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>max_nouts</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>realtime_scheduling</key>
-      <value></value>
+      <value>1.1</value>
     </param>
     <param>
       <key>alias</key>
@@ -425,7 +183,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(10, 10)</value>
+      <value>(20, 115)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -433,42 +191,26 @@
     </param>
   </block>
   <block>
-    <key>dtv_atsc_rx</key>
+    <key>variable</key>
     <param>
       <key>id</key>
-      <value>dtv_atsc_rx_0</value>
+      <value>oversampled_rate</value>
     </param>
     <param>
       <key>_enabled</key>
       <value>True</value>
     </param>
     <param>
-      <key>rate</key>
-      <value>sample_rate</value>
-    </param>
-    <param>
-      <key>sps</key>
-      <value>sps</value>
+      <key>value</key>
+      <value>atsc_sym_rate*sps</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>(312, 358)</value>
+      <value>(207, 115)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -487,7 +229,7 @@
     </param>
     <param>
       <key>type</key>
-      <value>fc32</value>
+      <value>sc16</value>
     </param>
     <param>
       <key>otw</key>
@@ -1155,7 +897,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(50, 342)</value>
+      <value>(43, 319)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1163,10 +905,10 @@
     </param>
   </block>
   <block>
-    <key>qtgui_freq_sink_x</key>
+    <key>blocks_head</key>
     <param>
       <key>id</key>
-      <value>usrp_freq_sink</value>
+      <value>blocks_head_0</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -1174,290 +916,145 @@
     </param>
     <param>
       <key>type</key>
-      <value>complex</value>
-    </param>
-    <param>
-      <key>name</key>
-      <value>"RX Spectrum"</value>
-    </param>
-    <param>
-      <key>fftsize</key>
-      <value>4096</value>
-    </param>
-    <param>
-      <key>wintype</key>
-      <value>firdes.WIN_BLACKMAN_hARRIS</value>
+      <value>short</value>
     </param>
     <param>
-      <key>fc</key>
-      <value>freq</value>
-    </param>
-    <param>
-      <key>bw</key>
-      <value>sample_rate</value>
-    </param>
-    <param>
-      <key>grid</key>
-      <value>True</value>
+      <key>num_items</key>
+      <value>int(sample_rate*duration)</value>
     </param>
     <param>
-      <key>autoscale</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>average</key>
-      <value>0.2</value>
-    </param>
-    <param>
-      <key>ymin</key>
-      <value>-140</value>
-    </param>
-    <param>
-      <key>ymax</key>
-      <value>10</value>
-    </param>
-    <param>
-      <key>nconnections</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>update_time</key>
-      <value>0.10</value>
-    </param>
-    <param>
-      <key>gui_hint</key>
-      <value>address@hidden</value>
-    </param>
-    <param>
-      <key>showports</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>label1</key>
-      <value></value>
-    </param>
-    <param>
-      <key>width1</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color1</key>
-      <value>"blue"</value>
-    </param>
-    <param>
-      <key>alpha1</key>
-      <value>1.0</value>
-    </param>
-    <param>
-      <key>label2</key>
-      <value></value>
-    </param>
-    <param>
-      <key>width2</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color2</key>
-      <value>"red"</value>
-    </param>
-    <param>
-      <key>alpha2</key>
-      <value>1.0</value>
-    </param>
-    <param>
-      <key>label3</key>
-      <value></value>
-    </param>
-    <param>
-      <key>width3</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color3</key>
-      <value>"green"</value>
-    </param>
-    <param>
-      <key>alpha3</key>
-      <value>1.0</value>
+      <key>vlen</key>
+      <value>2</value>
     </param>
     <param>
-      <key>label4</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>width4</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color4</key>
-      <value>"black"</value>
-    </param>
-    <param>
-      <key>alpha4</key>
-      <value>1.0</value>
-    </param>
-    <param>
-      <key>label5</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
-      <key>width5</key>
-      <value>1</value>
+      <key>minoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>color5</key>
-      <value>"cyan"</value>
+      <key>maxoutbuf</key>
+      <value>0</value>
     </param>
     <param>
-      <key>alpha5</key>
-      <value>1.0</value>
+      <key>_coordinate</key>
+      <value>(294, 335)</value>
     </param>
     <param>
-      <key>label6</key>
-      <value></value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>blocks_file_sink</key>
     <param>
-      <key>width6</key>
-      <value>1</value>
+      <key>id</key>
+      <value>blocks_file_sink_0</value>
     </param>
     <param>
-      <key>color6</key>
-      <value>"magenta"</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>alpha6</key>
-      <value>1.0</value>
+      <key>file</key>
+      <value>atsc_iq.sc16</value>
     </param>
     <param>
-      <key>label7</key>
-      <value></value>
+      <key>type</key>
+      <value>short</value>
     </param>
     <param>
-      <key>width7</key>
-      <value>1</value>
+      <key>vlen</key>
+      <value>2</value>
     </param>
     <param>
-      <key>color7</key>
-      <value>"yellow"</value>
+      <key>unbuffered</key>
+      <value>False</value>
     </param>
     <param>
-      <key>alpha7</key>
-      <value>1.0</value>
+      <key>append</key>
+      <value>False</value>
     </param>
     <param>
-      <key>label8</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
-      <key>width8</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color8</key>
-      <value>"dark red"</value>
-    </param>
-    <param>
-      <key>alpha8</key>
-      <value>1.0</value>
-    </param>
-    <param>
-      <key>label9</key>
+      <key>affinity</key>
       <value></value>
     </param>
     <param>
-      <key>width9</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color9</key>
-      <value>"dark green"</value>
-    </param>
-    <param>
-      <key>alpha9</key>
-      <value>1.0</value>
+      <key>_coordinate</key>
+      <value>(464, 319)</value>
     </param>
     <param>
-      <key>label10</key>
-      <value></value>
+      <key>_rotation</key>
+      <value>0</value>
     </param>
+  </block>
+  <block>
+    <key>options</key>
     <param>
-      <key>width10</key>
-      <value>1</value>
+      <key>id</key>
+      <value>uhd_atsc_capture</value>
     </param>
     <param>
-      <key>color10</key>
-      <value>"dark blue"</value>
+      <key>_enabled</key>
+      <value>True</value>
     </param>
     <param>
-      <key>alpha10</key>
-      <value>1.0</value>
+      <key>title</key>
+      <value>Receive ATSC from UHD</value>
     </param>
     <param>
-      <key>alias</key>
+      <key>author</key>
       <value></value>
     </param>
     <param>
-      <key>affinity</key>
+      <key>description</key>
       <value></value>
     </param>
     <param>
-      <key>minoutbuf</key>
-      <value>0</value>
+      <key>window_size</key>
+      <value>4000, 4000</value>
     </param>
     <param>
-      <key>maxoutbuf</key>
-      <value>0</value>
+      <key>generate_options</key>
+      <value>no_gui</value>
     </param>
     <param>
-      <key>_coordinate</key>
-      <value>(43, 240)</value>
+      <key>category</key>
+      <value>Custom</value>
     </param>
     <param>
-      <key>_rotation</key>
-      <value>180</value>
-    </param>
-  </block>
-  <block>
-    <key>blocks_file_sink</key>
-    <param>
-      <key>id</key>
-      <value>blocks_file_sink_0</value>
+      <key>run_options</key>
+      <value>run</value>
     </param>
     <param>
-      <key>_enabled</key>
+      <key>run</key>
       <value>True</value>
     </param>
     <param>
-      <key>file</key>
-      <value>mpeg.ts</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>byte</value>
-    </param>
-    <param>
-      <key>vlen</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>unbuffered</key>
-      <value>False</value>
-    </param>
-    <param>
-      <key>append</key>
-      <value>False</value>
+      <key>max_nouts</key>
+      <value>0</value>
     </param>
     <param>
-      <key>alias</key>
+      <key>realtime_scheduling</key>
       <value></value>
     </param>
     <param>
-      <key>affinity</key>
+      <key>alias</key>
       <value></value>
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(550, 350)</value>
+      <value>(11, 9)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1465,20 +1062,14 @@
     </param>
   </block>
   <connection>
-    <source_block_id>dtv_atsc_rx_0</source_block_id>
-    <sink_block_id>blocks_file_sink_0</sink_block_id>
-    <source_key>0</source_key>
-    <sink_key>0</sink_key>
-  </connection>
-  <connection>
     <source_block_id>u</source_block_id>
-    <sink_block_id>dtv_atsc_rx_0</sink_block_id>
+    <sink_block_id>blocks_head_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
   <connection>
-    <source_block_id>u</source_block_id>
-    <sink_block_id>usrp_freq_sink</sink_block_id>
+    <source_block_id>blocks_head_0</source_block_id>
+    <sink_block_id>blocks_file_sink_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
diff --git a/gr-dtv/examples/uhd_rx_atsc_short.grc 
b/gr-dtv/examples/uhd_rx_atsc_short.grc
deleted file mode 100644
index 7b8f961..0000000
--- a/gr-dtv/examples/uhd_rx_atsc_short.grc
+++ /dev/null
@@ -1,1534 +0,0 @@
-<?xml version='1.0' encoding='ASCII'?>
-<flow_graph>
-  <timestamp>Tue Jul 22 12:10:29 2014</timestamp>
-  <block>
-    <key>variable</key>
-    <param>
-      <key>id</key>
-      <value>atsc_sym_rate</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>value</key>
-      <value>4.5e6/286*684</value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(94, 115)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>variable</key>
-    <param>
-      <key>id</key>
-      <value>oversampled_rate</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>value</key>
-      <value>atsc_sym_rate*sps</value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(207, 115)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>variable</key>
-    <param>
-      <key>id</key>
-      <value>sps</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>value</key>
-      <value>1.1</value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(20, 115)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>qtgui_tab_widget</key>
-    <param>
-      <key>id</key>
-      <value>displays</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>num_tabs</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>label0</key>
-      <value>RX Spectrum</value>
-    </param>
-    <param>
-      <key>label1</key>
-      <value>Baseband</value>
-    </param>
-    <param>
-      <key>label2</key>
-      <value></value>
-    </param>
-    <param>
-      <key>label3</key>
-      <value>Tab 3</value>
-    </param>
-    <param>
-      <key>label4</key>
-      <value>Tab 4</value>
-    </param>
-    <param>
-      <key>gui_hint</key>
-      <value>0,0,1,4</value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(191, 28)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>variable_qtgui_chooser</key>
-    <param>
-      <key>id</key>
-      <value>antenna</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>label</key>
-      <value>Antenna</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>string</value>
-    </param>
-    <param>
-      <key>num_opts</key>
-      <value>2</value>
-    </param>
-    <param>
-      <key>value</key>
-      <value>TX/RX</value>
-    </param>
-    <param>
-      <key>options</key>
-      <value>[0, 1, 2]</value>
-    </param>
-    <param>
-      <key>labels</key>
-      <value>[]</value>
-    </param>
-    <param>
-      <key>option0</key>
-      <value>TX/RX</value>
-    </param>
-    <param>
-      <key>label0</key>
-      <value>TX/RX</value>
-    </param>
-    <param>
-      <key>option1</key>
-      <value>RX2</value>
-    </param>
-    <param>
-      <key>label1</key>
-      <value>RX2</value>
-    </param>
-    <param>
-      <key>option2</key>
-      <value>2</value>
-    </param>
-    <param>
-      <key>label2</key>
-      <value></value>
-    </param>
-    <param>
-      <key>option3</key>
-      <value>3</value>
-    </param>
-    <param>
-      <key>label3</key>
-      <value></value>
-    </param>
-    <param>
-      <key>option4</key>
-      <value>4</value>
-    </param>
-    <param>
-      <key>label4</key>
-      <value></value>
-    </param>
-    <param>
-      <key>widget</key>
-      <value>radio_buttons</value>
-    </param>
-    <param>
-      <key>orient</key>
-      <value>Qt.QVBoxLayout</value>
-    </param>
-    <param>
-      <key>gui_hint</key>
-      <value>1,0,1,1</value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(342, 20)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>variable_qtgui_entry</key>
-    <param>
-      <key>id</key>
-      <value>sample_rate</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>label</key>
-      <value>Sample Rate</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>real</value>
-    </param>
-    <param>
-      <key>value</key>
-      <value>6.25e6</value>
-    </param>
-    <param>
-      <key>gui_hint</key>
-      <value>1,2,1,1</value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(486, 104)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>variable_qtgui_range</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>18</value>
-    </param>
-    <param>
-      <key>start</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>stop</key>
-      <value>31</value>
-    </param>
-    <param>
-      <key>step</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>widget</key>
-      <value>counter_slider</value>
-    </param>
-    <param>
-      <key>orient</key>
-      <value>Qt.Horizontal</value>
-    </param>
-    <param>
-      <key>min_len</key>
-      <value>200</value>
-    </param>
-    <param>
-      <key>gui_hint</key>
-      <value>1,3,1,1</value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(621, 20)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>variable_qtgui_entry</key>
-    <param>
-      <key>id</key>
-      <value>freq</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>label</key>
-      <value>Frequency</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>real</value>
-    </param>
-    <param>
-      <key>value</key>
-      <value>605e6</value>
-    </param>
-    <param>
-      <key>gui_hint</key>
-      <value>1,1,1,1</value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(487, 18)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>options</key>
-    <param>
-      <key>id</key>
-      <value>uhd_rx_atsc_short</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>title</key>
-      <value>Receive ATSC from UHD</value>
-    </param>
-    <param>
-      <key>author</key>
-      <value></value>
-    </param>
-    <param>
-      <key>description</key>
-      <value></value>
-    </param>
-    <param>
-      <key>window_size</key>
-      <value>4000, 4000</value>
-    </param>
-    <param>
-      <key>generate_options</key>
-      <value>qt_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>max_nouts</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>realtime_scheduling</key>
-      <value></value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(10, 10)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>uhd_usrp_source</key>
-    <param>
-      <key>id</key>
-      <value>u</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>sc16</value>
-    </param>
-    <param>
-      <key>otw</key>
-      <value></value>
-    </param>
-    <param>
-      <key>stream_args</key>
-      <value></value>
-    </param>
-    <param>
-      <key>stream_chans</key>
-      <value>[]</value>
-    </param>
-    <param>
-      <key>dev_addr</key>
-      <value>""</value>
-    </param>
-    <param>
-      <key>dev_args</key>
-      <value>""</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>clock_source0</key>
-      <value></value>
-    </param>
-    <param>
-      <key>time_source0</key>
-      <value></value>
-    </param>
-    <param>
-      <key>sd_spec0</key>
-      <value></value>
-    </param>
-    <param>
-      <key>clock_source1</key>
-      <value></value>
-    </param>
-    <param>
-      <key>time_source1</key>
-      <value></value>
-    </param>
-    <param>
-      <key>sd_spec1</key>
-      <value></value>
-    </param>
-    <param>
-      <key>clock_source2</key>
-      <value></value>
-    </param>
-    <param>
-      <key>time_source2</key>
-      <value></value>
-    </param>
-    <param>
-      <key>sd_spec2</key>
-      <value></value>
-    </param>
-    <param>
-      <key>clock_source3</key>
-      <value></value>
-    </param>
-    <param>
-      <key>time_source3</key>
-      <value></value>
-    </param>
-    <param>
-      <key>sd_spec3</key>
-      <value></value>
-    </param>
-    <param>
-      <key>clock_source4</key>
-      <value></value>
-    </param>
-    <param>
-      <key>time_source4</key>
-      <value></value>
-    </param>
-    <param>
-      <key>sd_spec4</key>
-      <value></value>
-    </param>
-    <param>
-      <key>clock_source5</key>
-      <value></value>
-    </param>
-    <param>
-      <key>time_source5</key>
-      <value></value>
-    </param>
-    <param>
-      <key>sd_spec5</key>
-      <value></value>
-    </param>
-    <param>
-      <key>clock_source6</key>
-      <value></value>
-    </param>
-    <param>
-      <key>time_source6</key>
-      <value></value>
-    </param>
-    <param>
-      <key>sd_spec6</key>
-      <value></value>
-    </param>
-    <param>
-      <key>clock_source7</key>
-      <value></value>
-    </param>
-    <param>
-      <key>time_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>sample_rate</value>
-    </param>
-    <param>
-      <key>center_freq0</key>
-      <value>freq</value>
-    </param>
-    <param>
-      <key>gain0</key>
-      <value>gain</value>
-    </param>
-    <param>
-      <key>ant0</key>
-      <value>antenna</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>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>(50, 342)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>dtv_atsc_rx</key>
-    <param>
-      <key>id</key>
-      <value>dtv_atsc_rx_0</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>rate</key>
-      <value>sample_rate</value>
-    </param>
-    <param>
-      <key>sps</key>
-      <value>sps</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>(465, 358)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>blocks_file_sink</key>
-    <param>
-      <key>id</key>
-      <value>blocks_file_sink_0</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>file</key>
-      <value>mpeg.ts</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>byte</value>
-    </param>
-    <param>
-      <key>vlen</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>unbuffered</key>
-      <value>False</value>
-    </param>
-    <param>
-      <key>append</key>
-      <value>False</value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>affinity</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(668, 350)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>qtgui_freq_sink_x</key>
-    <param>
-      <key>id</key>
-      <value>usrp_freq_sink</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>complex</value>
-    </param>
-    <param>
-      <key>name</key>
-      <value>"RX Spectrum"</value>
-    </param>
-    <param>
-      <key>fftsize</key>
-      <value>4096</value>
-    </param>
-    <param>
-      <key>wintype</key>
-      <value>firdes.WIN_BLACKMAN_hARRIS</value>
-    </param>
-    <param>
-      <key>fc</key>
-      <value>freq</value>
-    </param>
-    <param>
-      <key>bw</key>
-      <value>sample_rate</value>
-    </param>
-    <param>
-      <key>grid</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>autoscale</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>average</key>
-      <value>0.2</value>
-    </param>
-    <param>
-      <key>ymin</key>
-      <value>-140</value>
-    </param>
-    <param>
-      <key>ymax</key>
-      <value>10</value>
-    </param>
-    <param>
-      <key>nconnections</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>update_time</key>
-      <value>0.10</value>
-    </param>
-    <param>
-      <key>gui_hint</key>
-      <value>address@hidden</value>
-    </param>
-    <param>
-      <key>showports</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>label1</key>
-      <value></value>
-    </param>
-    <param>
-      <key>width1</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color1</key>
-      <value>"blue"</value>
-    </param>
-    <param>
-      <key>alpha1</key>
-      <value>1.0</value>
-    </param>
-    <param>
-      <key>label2</key>
-      <value></value>
-    </param>
-    <param>
-      <key>width2</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color2</key>
-      <value>"red"</value>
-    </param>
-    <param>
-      <key>alpha2</key>
-      <value>1.0</value>
-    </param>
-    <param>
-      <key>label3</key>
-      <value></value>
-    </param>
-    <param>
-      <key>width3</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color3</key>
-      <value>"green"</value>
-    </param>
-    <param>
-      <key>alpha3</key>
-      <value>1.0</value>
-    </param>
-    <param>
-      <key>label4</key>
-      <value></value>
-    </param>
-    <param>
-      <key>width4</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color4</key>
-      <value>"black"</value>
-    </param>
-    <param>
-      <key>alpha4</key>
-      <value>1.0</value>
-    </param>
-    <param>
-      <key>label5</key>
-      <value></value>
-    </param>
-    <param>
-      <key>width5</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color5</key>
-      <value>"cyan"</value>
-    </param>
-    <param>
-      <key>alpha5</key>
-      <value>1.0</value>
-    </param>
-    <param>
-      <key>label6</key>
-      <value></value>
-    </param>
-    <param>
-      <key>width6</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color6</key>
-      <value>"magenta"</value>
-    </param>
-    <param>
-      <key>alpha6</key>
-      <value>1.0</value>
-    </param>
-    <param>
-      <key>label7</key>
-      <value></value>
-    </param>
-    <param>
-      <key>width7</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color7</key>
-      <value>"yellow"</value>
-    </param>
-    <param>
-      <key>alpha7</key>
-      <value>1.0</value>
-    </param>
-    <param>
-      <key>label8</key>
-      <value></value>
-    </param>
-    <param>
-      <key>width8</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color8</key>
-      <value>"dark red"</value>
-    </param>
-    <param>
-      <key>alpha8</key>
-      <value>1.0</value>
-    </param>
-    <param>
-      <key>label9</key>
-      <value></value>
-    </param>
-    <param>
-      <key>width9</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color9</key>
-      <value>"dark green"</value>
-    </param>
-    <param>
-      <key>alpha9</key>
-      <value>1.0</value>
-    </param>
-    <param>
-      <key>label10</key>
-      <value></value>
-    </param>
-    <param>
-      <key>width10</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>color10</key>
-      <value>"dark blue"</value>
-    </param>
-    <param>
-      <key>alpha10</key>
-      <value>1.0</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>(43, 240)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>180</value>
-    </param>
-  </block>
-  <block>
-    <key>blocks_interleaved_short_to_complex</key>
-    <param>
-      <key>id</key>
-      <value>blocks_interleaved_short_to_complex_0</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>vector_input</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>swap</key>
-      <value>False</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>(284, 366)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <connection>
-    <source_block_id>dtv_atsc_rx_0</source_block_id>
-    <sink_block_id>blocks_file_sink_0</sink_block_id>
-    <source_key>0</source_key>
-    <sink_key>0</sink_key>
-  </connection>
-  <connection>
-    <source_block_id>u</source_block_id>
-    <sink_block_id>blocks_interleaved_short_to_complex_0</sink_block_id>
-    <source_key>0</source_key>
-    <sink_key>0</sink_key>
-  </connection>
-  <connection>
-    <source_block_id>blocks_interleaved_short_to_complex_0</source_block_id>
-    <sink_block_id>dtv_atsc_rx_0</sink_block_id>
-    <source_key>0</source_key>
-    <sink_key>0</sink_key>
-  </connection>
-  <connection>
-    <source_block_id>blocks_interleaved_short_to_complex_0</source_block_id>
-    <sink_block_id>usrp_freq_sink</sink_block_id>
-    <source_key>0</source_key>
-    <sink_key>0</sink_key>
-  </connection>
-</flow_graph>



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