[op25-dev] P25 decoding using RTL_SDR

Sean Kealy superstardodge@yahoo.com [op25-dev] op25-dev at yahoogroups.com
Fri Aug 24 01:15:35 UTC 2018


Been away from this project for awhile, Where can I get a copy of the live cd?



--------------------------------------------
On Sun, 7/15/18, gnorbury at bondcar.com [op25-dev] <op25-dev at yahoogroups.com> wrote:

 Subject: [op25-dev] Re: P25 decoding using RTL_SDR
 To: op25-dev at yahoogroups.com
 Received: Sunday, July 15, 2018, 7:05 PM
 
 
  
 
 
 
   
 
 
     
       
       
       Without further information (i.e. stderr.2
 logs) it's hard to say for sure what the problem is. 
 Most likely although your fft plot "looks" good
 you may not be accurately tuned.  Typically you'll need
 to adjust ppm (-q parameter) to bring the tuning into
 alignment enough that the p25_demod locks on.  When that
 happens you should see the TSBK counter start to
 increment.
 If
 you're using the "boatbod" fork you can use
 the mixer plot (key #5) to dial in the ppm and fine tuning
 more accurately than is possible with the fft plot alone. 
 Furthermore, you can also use a nac value of 0 if you
 don't know or cannot verify the nac of the system you
 are trying to tune.
 
 
     
      
 
     
     
 
 
 
 #yiv5719345116 #yiv5719345116 --
   #yiv5719345116ygrp-mkp {
 border:1px solid #d8d8d8;font-family:Arial;margin:10px
 0;padding:0 10px;}
 
 #yiv5719345116 #yiv5719345116ygrp-mkp hr {
 border:1px solid #d8d8d8;}
 
 #yiv5719345116 #yiv5719345116ygrp-mkp #yiv5719345116hd {
 color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px
 0;}
 
 #yiv5719345116 #yiv5719345116ygrp-mkp #yiv5719345116ads {
 margin-bottom:10px;}
 
 #yiv5719345116 #yiv5719345116ygrp-mkp .yiv5719345116ad {
 padding:0 0;}
 
 #yiv5719345116 #yiv5719345116ygrp-mkp .yiv5719345116ad p {
 margin:0;}
 
 #yiv5719345116 #yiv5719345116ygrp-mkp .yiv5719345116ad a {
 color:#0000ff;text-decoration:none;}
 #yiv5719345116 #yiv5719345116ygrp-sponsor
 #yiv5719345116ygrp-lc {
 font-family:Arial;}
 
 #yiv5719345116 #yiv5719345116ygrp-sponsor
 #yiv5719345116ygrp-lc #yiv5719345116hd {
 margin:10px
 0px;font-weight:700;font-size:78%;line-height:122%;}
 
 #yiv5719345116 #yiv5719345116ygrp-sponsor
 #yiv5719345116ygrp-lc .yiv5719345116ad {
 margin-bottom:10px;padding:0 0;}
 
 #yiv5719345116 #yiv5719345116actions {
 font-family:Verdana;font-size:11px;padding:10px 0;}
 
 #yiv5719345116 #yiv5719345116activity {
 background-color:#e0ecee;float:left;font-family:Verdana;font-size:10px;padding:10px;}
 
 #yiv5719345116 #yiv5719345116activity span {
 font-weight:700;}
 
 #yiv5719345116 #yiv5719345116activity span:first-child {
 text-transform:uppercase;}
 
 #yiv5719345116 #yiv5719345116activity span a {
 color:#5085b6;text-decoration:none;}
 
 #yiv5719345116 #yiv5719345116activity span span {
 color:#ff7900;}
 
 #yiv5719345116 #yiv5719345116activity span
 .yiv5719345116underline {
 text-decoration:underline;}
 
 #yiv5719345116 .yiv5719345116attach {
 clear:both;display:table;font-family:Arial;font-size:12px;padding:10px
 0;width:400px;}
 
 #yiv5719345116 .yiv5719345116attach div a {
 text-decoration:none;}
 
 #yiv5719345116 .yiv5719345116attach img {
 border:none;padding-right:5px;}
 
 #yiv5719345116 .yiv5719345116attach label {
 display:block;margin-bottom:5px;}
 
 #yiv5719345116 .yiv5719345116attach label a {
 text-decoration:none;}
 
 #yiv5719345116 blockquote {
 margin:0 0 0 4px;}
 
 #yiv5719345116 .yiv5719345116bold {
 font-family:Arial;font-size:13px;font-weight:700;}
 
 #yiv5719345116 .yiv5719345116bold a {
 text-decoration:none;}
 
 #yiv5719345116 dd.yiv5719345116last p a {
 font-family:Verdana;font-weight:700;}
 
 #yiv5719345116 dd.yiv5719345116last p span {
 margin-right:10px;font-family:Verdana;font-weight:700;}
 
 #yiv5719345116 dd.yiv5719345116last p
 span.yiv5719345116yshortcuts {
 margin-right:0;}
 
 #yiv5719345116 div.yiv5719345116attach-table div div a {
 text-decoration:none;}
 
 #yiv5719345116 div.yiv5719345116attach-table {
 width:400px;}
 
 #yiv5719345116 div.yiv5719345116file-title a, #yiv5719345116
 div.yiv5719345116file-title a:active, #yiv5719345116
 div.yiv5719345116file-title a:hover, #yiv5719345116
 div.yiv5719345116file-title a:visited {
 text-decoration:none;}
 
 #yiv5719345116 div.yiv5719345116photo-title a,
 #yiv5719345116 div.yiv5719345116photo-title a:active,
 #yiv5719345116 div.yiv5719345116photo-title a:hover,
 #yiv5719345116 div.yiv5719345116photo-title a:visited {
 text-decoration:none;}
 
 #yiv5719345116 div#yiv5719345116ygrp-mlmsg
 #yiv5719345116ygrp-msg p a span.yiv5719345116yshortcuts {
 font-family:Verdana;font-size:10px;font-weight:normal;}
 
 #yiv5719345116 .yiv5719345116green {
 color:#628c2a;}
 
 #yiv5719345116 .yiv5719345116MsoNormal {
 margin:0 0 0 0;}
 
 #yiv5719345116 o {
 font-size:0;}
 
 #yiv5719345116 #yiv5719345116photos div {
 float:left;width:72px;}
 
 #yiv5719345116 #yiv5719345116photos div div {
 border:1px solid
 #666666;min-height:62px;overflow:hidden;width:62px;}
 
 #yiv5719345116 #yiv5719345116photos div label {
 color:#666666;font-size:10px;overflow:hidden;text-align:center;white-space:nowrap;width:64px;}
 
 #yiv5719345116 #yiv5719345116reco-category {
 font-size:77%;}
 
 #yiv5719345116 #yiv5719345116reco-desc {
 font-size:77%;}
 
 #yiv5719345116 .yiv5719345116replbq {
 margin:4px;}
 
 #yiv5719345116 #yiv5719345116ygrp-actbar div a:first-child {
 margin-right:2px;padding-right:5px;}
 
 #yiv5719345116 #yiv5719345116ygrp-mlmsg {
 font-size:13px;font-family:Arial, helvetica, clean,
 sans-serif;}
 
 #yiv5719345116 #yiv5719345116ygrp-mlmsg table {
 font-size:inherit;font:100%;}
 
 #yiv5719345116 #yiv5719345116ygrp-mlmsg select,
 #yiv5719345116 input, #yiv5719345116 textarea {
 font:99% Arial, Helvetica, clean, sans-serif;}
 
 #yiv5719345116 #yiv5719345116ygrp-mlmsg pre, #yiv5719345116
 code {
 font:115% monospace;}
 
 #yiv5719345116 #yiv5719345116ygrp-mlmsg * {
 line-height:1.22em;}
 
 #yiv5719345116 #yiv5719345116ygrp-mlmsg #yiv5719345116logo {
 padding-bottom:10px;}
 
 
 #yiv5719345116 #yiv5719345116ygrp-msg p a {
 font-family:Verdana;}
 
 #yiv5719345116 #yiv5719345116ygrp-msg
 p#yiv5719345116attach-count span {
 color:#1E66AE;font-weight:700;}
 
 #yiv5719345116 #yiv5719345116ygrp-reco
 #yiv5719345116reco-head {
 color:#ff7900;font-weight:700;}
 
 #yiv5719345116 #yiv5719345116ygrp-reco {
 margin-bottom:20px;padding:0px;}
 
 #yiv5719345116 #yiv5719345116ygrp-sponsor #yiv5719345116ov
 li a {
 font-size:130%;text-decoration:none;}
 
 #yiv5719345116 #yiv5719345116ygrp-sponsor #yiv5719345116ov
 li {
 font-size:77%;list-style-type:square;padding:6px 0;}
 
 #yiv5719345116 #yiv5719345116ygrp-sponsor #yiv5719345116ov
 ul {
 margin:0;padding:0 0 0 8px;}
 
 #yiv5719345116 #yiv5719345116ygrp-text {
 font-family:Georgia;}
 
 #yiv5719345116 #yiv5719345116ygrp-text p {
 margin:0 0 1em 0;}
 
 #yiv5719345116 #yiv5719345116ygrp-text tt {
 font-size:120%;}
 
 #yiv5719345116 #yiv5719345116ygrp-vital ul li:last-child {
 border-right:none !important;
 }
 #yiv5719345116 
 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osmocom.org/pipermail/op25-dev/attachments/20180824/df9b2303/attachment-0001.html>


More information about the op25-dev mailing list