From 6b8819c43c5a7bf7f878c5612ab95f669a846f2d Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Mon, 23 Mar 2015 20:23:08 +0100
Subject: [PATCH] ais_tx_laforge: Reduce UHD/USRP gain to 0dB

... which is sufficient if we are connected over coaxial wire to the AIS
receiver.
---
 ais_tx_laforge.grc | 612 ++++++++++++++++++++++-----------------------
 1 file changed, 306 insertions(+), 306 deletions(-)

diff --git a/ais_tx_laforge.grc b/ais_tx_laforge.grc
index 8ca8099..0552a52 100644
--- a/ais_tx_laforge.grc
+++ b/ais_tx_laforge.grc
@@ -1,7 +1,7 @@
 <?xml version='1.0' encoding='ASCII'?>
 <?grc format='1' created='3.7.5'?>
 <flow_graph>
-  <timestamp>Mon Mar 23 20:09:48 2015</timestamp>
+  <timestamp>Mon Mar 23 20:22:30 2015</timestamp>
   <block>
     <key>options</key>
     <param>
@@ -69,7 +69,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>samp_rate</value>
+      <value>channel_select</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -77,7 +77,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>326531</value>
+      <value>1</value>
     </param>
     <param>
       <key>alias</key>
@@ -85,7 +85,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(173, 0)</value>
+      <value>(368, -1)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -123,7 +123,7 @@
     <key>variable</key>
     <param>
       <key>id</key>
-      <value>channel_select</value>
+      <value>samp_rate</value>
     </param>
     <param>
       <key>_enabled</key>
@@ -131,7 +131,7 @@
     </param>
     <param>
       <key>value</key>
-      <value>1</value>
+      <value>326531</value>
     </param>
     <param>
       <key>alias</key>
@@ -139,7 +139,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(368, -1)</value>
+      <value>(173, 0)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -782,6 +782,304 @@
       <value>0</value>
     </param>
   </block>
+  <block>
+    <key>AISTX_Build_Frame</key>
+    <param>
+      <key>id</key>
+      <value>AISTX_Build_Frame_1</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>sentence</key>
+      <value>010100000001101100011001110111011011110000000000000001011110000000000000</value>
+    </param>
+    <param>
+      <key>repeat</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>enable_NRZI</key>
+      <value>True</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>(1, 317)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>analog_sig_source_x</key>
+    <param>
+      <key>id</key>
+      <value>analog_sig_source_x_0_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>samp_rate</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>waveform</key>
+      <value>analog.GR_SIN_WAVE</value>
+    </param>
+    <param>
+      <key>freq</key>
+      <value>25000</value>
+    </param>
+    <param>
+      <key>amp</key>
+      <value>255</value>
+    </param>
+    <param>
+      <key>offset</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>(280, 400)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>digital_gmsk_mod</key>
+    <param>
+      <key>id</key>
+      <value>digital_gmsk_mod_0_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>samples_per_symbol</key>
+      <value>int(samp_rate/bit_rate)</value>
+    </param>
+    <param>
+      <key>bt</key>
+      <value>0.4</value>
+    </param>
+    <param>
+      <key>verbose</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>log</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>(249, 321)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_socket_pdu</key>
+    <param>
+      <key>id</key>
+      <value>blocks_socket_pdu_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>"TCP_SERVER"</value>
+    </param>
+    <param>
+      <key>host</key>
+      <value></value>
+    </param>
+    <param>
+      <key>port</key>
+      <value>52001</value>
+    </param>
+    <param>
+      <key>mtu</key>
+      <value>10000</value>
+    </param>
+    <param>
+      <key>tcp_no_delay</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>(16, 631)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_pdu_to_tagged_stream</key>
+    <param>
+      <key>id</key>
+      <value>blocks_pdu_to_tagged_stream_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>byte</value>
+    </param>
+    <param>
+      <key>tag</key>
+      <value>packet_len</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>(480, 652)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>AisEncoder</key>
+    <param>
+      <key>id</key>
+      <value>AisEncoder_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>enable_NRZI</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>num_lead_in_syms</key>
+      <value>256</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>(200, 652)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
   <block>
     <key>uhd_usrp_sink</key>
     <param>
@@ -938,7 +1236,7 @@
     </param>
     <param>
       <key>gain0</key>
-      <value>50</value>
+      <value>0</value>
     </param>
     <param>
       <key>ant0</key>
@@ -1465,304 +1763,6 @@
       <value>0</value>
     </param>
   </block>
-  <block>
-    <key>AISTX_Build_Frame</key>
-    <param>
-      <key>id</key>
-      <value>AISTX_Build_Frame_1</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>False</value>
-    </param>
-    <param>
-      <key>sentence</key>
-      <value>010100000001101100011001110111011011110000000000000001011110000000000000</value>
-    </param>
-    <param>
-      <key>repeat</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>enable_NRZI</key>
-      <value>True</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>(1, 317)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>analog_sig_source_x</key>
-    <param>
-      <key>id</key>
-      <value>analog_sig_source_x_0_0</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>complex</value>
-    </param>
-    <param>
-      <key>samp_rate</key>
-      <value>samp_rate</value>
-    </param>
-    <param>
-      <key>waveform</key>
-      <value>analog.GR_SIN_WAVE</value>
-    </param>
-    <param>
-      <key>freq</key>
-      <value>25000</value>
-    </param>
-    <param>
-      <key>amp</key>
-      <value>255</value>
-    </param>
-    <param>
-      <key>offset</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>(280, 400)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>digital_gmsk_mod</key>
-    <param>
-      <key>id</key>
-      <value>digital_gmsk_mod_0_0</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>samples_per_symbol</key>
-      <value>int(samp_rate/bit_rate)</value>
-    </param>
-    <param>
-      <key>bt</key>
-      <value>0.4</value>
-    </param>
-    <param>
-      <key>verbose</key>
-      <value>False</value>
-    </param>
-    <param>
-      <key>log</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>(249, 321)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>blocks_socket_pdu</key>
-    <param>
-      <key>id</key>
-      <value>blocks_socket_pdu_0</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>"TCP_SERVER"</value>
-    </param>
-    <param>
-      <key>host</key>
-      <value></value>
-    </param>
-    <param>
-      <key>port</key>
-      <value>52001</value>
-    </param>
-    <param>
-      <key>mtu</key>
-      <value>10000</value>
-    </param>
-    <param>
-      <key>tcp_no_delay</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>(16, 631)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>blocks_pdu_to_tagged_stream</key>
-    <param>
-      <key>id</key>
-      <value>blocks_pdu_to_tagged_stream_0</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>type</key>
-      <value>byte</value>
-    </param>
-    <param>
-      <key>tag</key>
-      <value>packet_len</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>(480, 652)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
-  <block>
-    <key>AisEncoder</key>
-    <param>
-      <key>id</key>
-      <value>AisEncoder_0</value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>enable_NRZI</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>num_lead_in_syms</key>
-      <value>256</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>(200, 652)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-  </block>
   <connection>
     <source_block_id>digital_gmsk_mod_0</source_block_id>
     <sink_block_id>blocks_multiply_xx_0</sink_block_id>