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<p>The constellation just shows that you have a stable signal being decoded, not WHAT the data stream contains. In an ideal world you'd just see four tight clusters of data in the four corners of a square regardless of whether you are decoding a control channel or voice. In practice you may see some slight disturbances and spread of the pattern into an X shape. You may also notice momentary rotation of the pattern due to phase shifts, but these will (usually) go away as the gardner_costas loop adjusts itself.<br><br>There are potentially numerous reasons for not hearing voice, but incorrect command line parameters are the most common. Make sure you have "-V", "-2" and "-U" specified. When a tgid is tuned, you should see an indication at the bottom of the terminal screen showing the frequency and optional (phase 2 only) slot number as well as the tgid and tag (if available). If you're not seeing that, it's not attempting to decode audio.<br><br>if you are running my version of the code (github.com/boatbod/op25) you have the option to suppress encrypted audio using the "--nocrypt" command line parameter. In this instance you should see indication on the terminal screen (bottom right) when encrypted audio is being suppressed. On Max's version of the code, encrypted audio will be played and just sounds like garbage noise.<br><br class="yui-cursor"><div class="ygroups-quoted">Install is most easily carried out using the ~/op25/install.sh script once you have cloned your repo of choice.</div><div class="ygroups-quoted"><br></div><div class="ygroups-quoted">Graham</div><div class="ygroups-quoted"><br></div><div class="ygroups-quoted">---In op25-dev@yahoogroups.com, <bwmzzzx@...> wrote :<br><br><div id="ygrps-yiv-64566317"><div style="color:#000;background-color:#fff;font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"><div id="ygrps-yiv-64566317yui_3_16_0_ym19_1_1515338267215_6360" dir="ltr"><span id="ygrps-yiv-64566317yui_3_16_0_ym19_1_1515338267215_6448">I finally had time to install new Ubuntu 14 load and op25 and it started working, I think. I used the constelation window to determine if I was receiving a p25 transmission but no sound. I finally found out that not all constelations mean sound?? Which brings me to a question. What is heard or seen on the windows during an encrypted transmission? If it's the same type of constelation diagram but no sound then it's working. I then put my old P25 phase 1 scanner running alongside my op25 to see if I was getting the same transmissions and it appears there is a little bit of difference. I guess they haven't completly gone to phase 2 yet. One more quick question, do the installation instructions given back by Bill still hold true for this new version of op25? Hoping all had a Merry Christmas and Happy New Year too.....</span></div><div class="ygrps-yiv-64566317qtdSeparateBR" id="ygrps-yiv-64566317yui_3_16_0_ym19_1_1515338267215_6359"><br><br></div><div class="ygrps-yiv-64566317yahoo_quoted" id="ygrps-yiv-64566317yui_3_16_0_ym19_1_1515338267215_6345"><div style="font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;" id="ygrps-yiv-64566317yui_3_16_0_ym19_1_1515338267215_6344"><div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;" id="ygrps-yiv-64566317yui_3_16_0_ym19_1_1515338267215_6343"><br></div></div></div></div></div></div></p>
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