Update packet len

gnuradio/loopback_ofdm.grc

 <?xml version='1.0' encoding='utf-8'?>
-<?grc format='1' created='3.7.10'?>
+<?grc format='1' created='3.7.13'?>
 <flow_graph>
   <timestamp>Wed Jul  9 15:50:17 2014</timestamp>
   <block>
@@ -72,6 +72,10 @@
       <key>run</key>
       <value>True</value>
     </param>
+    <param>
+      <key>sizing_mode</key>
+      <value>fixed</value>
+    </param>
     <param>
       <key>thread_safe_setters</key>
       <value></value>
@@ -80,6 +84,10 @@
       <key>title</key>
       <value>OFDM Rx</value>
     </param>
+    <param>
+      <key>placement</key>
+      <value>(0,0)</value>
+    </param>
   </block>
   <block>
     <key>variable</key>
@@ -236,7 +244,7 @@
     </param>
     <param>
       <key>gui_hint</key>
-      <value></value>
+      <value>1,0,1,1</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -330,7 +338,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>2*(fft_len-5)</value>
+      <value>96</value>
     </param>
   </block>
   <block>
@@ -569,7 +577,7 @@
     </param>
     <param>
       <key>gui_hint</key>
-      <value>0,11,1,1</value>
+      <value>0,0,1,1</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -609,7 +617,7 @@
     </param>
     <param>
       <key>widget</key>
-      <value>dial</value>
+      <value>counter_slider</value>
     </param>
   </block>
   <block>
@@ -632,7 +640,7 @@
     </param>
     <param>
       <key>gui_hint</key>
-      <value>0,12,1,1</value>
+      <value>0,1,1,1</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -672,7 +680,7 @@
     </param>
     <param>
       <key>widget</key>
-      <value>dial</value>
+      <value>counter_slider</value>
     </param>
   </block>
   <block>
@@ -695,7 +703,7 @@
     </param>
     <param>
       <key>gui_hint</key>
-      <value>0,13,1,1</value>
+      <value>0,2,1,1</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -735,7 +743,7 @@
     </param>
     <param>
       <key>widget</key>
-      <value>dial</value>
+      <value>counter_slider</value>
     </param>
   </block>
   <block>
@@ -758,7 +766,7 @@
     </param>
     <param>
       <key>gui_hint</key>
-      <value>0,14,1,1</value>
+      <value>0,3,1,1</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -798,7 +806,7 @@
     </param>
     <param>
       <key>widget</key>
-      <value>dial</value>
+      <value>counter_slider</value>
     </param>
   </block>
   <block>
@@ -1123,7 +1131,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(992, 436)</value>
+      <value>(1016, 444)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1148,6 +1156,10 @@
   </block>
   <block>
     <key>blocks_file_source</key>
+    <param>
+      <key>begin_tag</key>
+      <value>pmt.PMT_NIL</value>
+    </param>
     <param>
       <key>alias</key>
       <value></value>
@@ -1331,7 +1343,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(208, 244)</value>
+      <value>(208, 340)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -2419,6 +2431,10 @@
       <key>use_even_carriers</key>
       <value>False</value>
     </param>
+    <param>
+      <key>threshold</key>
+      <value>0.9</value>
+    </param>
   </block>
   <block>
     <key>digital_ofdm_tx</key>
@@ -2751,7 +2767,7 @@
     </param>
     <param>
       <key>gui_hint</key>
-      <value></value>
+      <value>2,2,2,2</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -3025,6 +3041,10 @@
       <key>srate</key>
       <value>samp_rate</value>
     </param>
+    <param>
+      <key>stemplot</key>
+      <value>False</value>
+    </param>
     <param>
       <key>tr_chan</key>
       <value>0</value>
@@ -3110,11 +3130,11 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1424, 568)</value>
+      <value>(1432, 564)</value>
     </param>
     <param>
       <key>gui_hint</key>
-      <value></value>
+      <value>2,0,2,2</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -3388,6 +3408,10 @@
       <key>srate</key>
       <value>samp_rate</value>
     </param>
+    <param>
+      <key>stemplot</key>
+      <value>False</value>
+    </param>
     <param>
       <key>tr_chan</key>
       <value>0</value>

gnuradio/transmisor_ofdm.grc

 <?xml version='1.0' encoding='utf-8'?>
-<?grc format='1' created='3.7.10'?>
+<?grc format='1' created='3.7.13'?>
 <flow_graph>
   <timestamp>Tue Oct  8 15:38:56 2013</timestamp>
   <block>
@@ -72,6 +72,10 @@
       <key>run</key>
       <value>True</value>
     </param>
+    <param>
+      <key>sizing_mode</key>
+      <value>fixed</value>
+    </param>
     <param>
       <key>thread_safe_setters</key>
       <value></value>
@@ -80,6 +84,10 @@
       <key>title</key>
       <value></value>
     </param>
+    <param>
+      <key>placement</key>
+      <value>(0,0)</value>
+    </param>
   </block>
   <block>
     <key>variable</key>
@@ -303,7 +311,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>118</value>
+      <value>96</value>
     </param>
   </block>
   <block>
@@ -443,6 +451,10 @@
   </block>
   <block>
     <key>blocks_file_source</key>
+    <param>
+      <key>begin_tag</key>
+      <value>pmt.PMT_NIL</value>
+    </param>
     <param>
       <key>alias</key>
       <value></value>
@@ -2442,6 +2454,10 @@
       <key>srate</key>
       <value>samp_rate</value>
     </param>
+    <param>
+      <key>stemplot</key>
+      <value>False</value>
+    </param>
     <param>
       <key>tr_chan</key>
       <value>0</value>