SDTrunk ---> <_ _> SYNC LOSS - BTS PROCESSED (9600)

[AB9NN]

When I look at Messages for the currently playing tuner tuned to the correct frequency I get the following message over and over:

<_ _> SYNC LOSS - BTS PROCESSED (9600)

It is a very strong signal and decodes nicely in DSD+ FastLane. What am I doing wrong?

 

[DRL-XM43]

Is this a P25 system - are you trunk following - what version of SDRTrunk are you using?

If it is P25 is it a Phase 1 or 2 system?

 

[AB9NN]

This is a P25 Phase I system. How do I determine the version of SDTrunk I am using? I think it's 6 months to a year or so old. I have it installed in the following folder:
C:\_Files\SDR - Software Defined Radio\sdr-trunk-windows-x64-Alpha-09

 

[DRL-XM43]

This is a P25 Phase I system. How do I determine the version of SDTrunk I am using? I think it's 6 months to a year or so old. I have it installed in the following folder:
C:\_Files\SDR - Software Defined Radio\sdr-trunk-windows-x64-Alpha-09

It may be best to udgrade to the latest versions then go from there

SDRTrunk P25 Phase II testing

That didn't do it either. I'm not sure what's causing this but I'm not getting any errors while building. Look here

forums.radioreference.com

GitHub - DSheirer/sdrtrunk: A cross-platform java application for decoding, monitoring, recording and streaming trunked mobile and related radio protocols using Software Defined Radios (SDR). Website:

A cross-platform java application for decoding, monitoring, recording and streaming trunked mobile and related radio protocols using Software Defined Radios (SDR). Website: - DSheirer/sdrtrunk

github.com

 

[AB9NN]

Did that this morning. Same result...

 

[DRL-XM43]

So what system is it? What decoder is selected?

(Easiest to link to the RR DB page to see the system)

Some/Any information will help folks to help you.

 

[AB9NN]

System is here: https://www.radioreference.com/apps/db/?sid=100 - search for "Beulah" and find control channel at 853.9625 which my tuners are tuned to. It is Michigan's Public Safety Communications System (MPSCS) which is Project 25 Phase I. I specified Decoder Type = P25 Phase I and Modulation as Normal (C4FM).

 

[DRL-XM43]

Should be Simulcast(LSM) not C4FM

 

[AB9NN]

Thanks. Same result after the above change...

 

[DRL-XM43]

Thanks. Same result after the above change...

Are your tuners dialed in for PPM correction?
Do they rotate control channels randomly?
Are you able to decode other P25 systems with SDRTrunk?

 

[AB9NN]

I am able to tune the same control channel/system and decode/follow with DSD+ FastLane quite nicely. Therefore it's probably not a tuner issue.

 

[DRL-XM43]

I am able to tune the same control channel/system and decode/follow with DSD+ FastLane quite nicely. Therefore it's probably not a tuner issue.

As you have done before, you should log the issue with the SDRTrunk support forum I am sure it would be resolved quickly, we know it is not the software so it has to be something other.

 

[BM82557]

Redirecting to Google Groups

 

[DRL-XM43]

Update for others experiencing similar issue.

Make sure you have not applied a message filter.....
(issue solved).

 

[AB9NN]

filter was not applied. Issue not solved... I have cross-posted in the SDRTrunk help forum.

 

[rspears1966]

AB9NN, I had the same issue, my solution was to ditch DSRTrunk and move to FMP24 and DSD+ Fastlane (I only use one SDR radio).

If you're running everything on one PC, here's the command lines (or .bat file code):
1) FMP24 -rc i1 -o20001 -P0.0 -a1 -b-12.5 -f853.8500
note: -f will be the control freq of your local P25 system
2) DSDPlus -r1 -e -T -E -i20001
note: this will create a .wav file in the local directory and it will become extremely large over time
note: this will pipe audio out to your default windows device, make sure you set this before you kick off this command

That's it. Two command lines, and one SDR radio. Decoded P25 traffic.

Hope this helps.

Bobby
AE4B

 

[DRL-XM43]

AB9NN, I had the same issue, my solution was to ditch DSRTrunk and move to FMP24 and DSD+ Fastlane (I only use one SDR radio).

If you're running everything on one PC, here's the command lines (or .bat file code):
1) FMP24 -rc i1 -o20001 -P0.0 -a1 -b-12.5 -f853.8500
note: -f will be the control freq of your local P25 system
2) DSDPlus -r1 -e -T -E -i20001
note: this will create a .wav file in the local directory and it will become extremely large over time
note: this will pipe audio out to your default windows device, make sure you set this before you kick off this command

That's it. Two command lines, and one SDR radio. Decoded P25 traffic.

Hope this helps.

Bobby
AE4B

He said earlier that he is decoding it nicely with FMP24/DSD+ already.

 

[Ridgefam1]

Merry Christmas, I have the same issue. any updates or ways to correct it. I installed yesterdays version no luck yet.

 

[DRL-XM43]

Merry Christmas, I have the same issue. any updates or ways to correct it. I installed yesterdays version no luck yet.

Apparently an off tuned dongle (ppm issue) is one possibility, but it may not be your issue Make sure you have not applied a message filter..... another possibility.