[op25-dev] P25 decoding using RTL_SDR

Matt Ames matt.ames7bc@gmail.com [op25-dev] op25-dev at yahoogroups.com
Fri Aug 24 01:28:40 UTC 2018


Hi Sean,

The install.sh script has been so reliable and easy that there has been no
need for a live CD. Give the instructions here (
http://osmocom.org/projects/op25/wiki/InstallInstructionsPage) a go.

Cheers,
Matt


On Fri, 24 Aug 2018 at 11:17, Sean Kealy superstardodge at yahoo.com
[op25-dev] <op25-dev at yahoogroups.com> wrote:

>
>
> 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
>
>
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>
> 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.
>
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