DSD+ VC following - some guidance please

[pnoelw]

A newbie to DSD+, I have purchaed the fastlane option.

Over the last few weeks I've slowly worked through feeding audio via VAC and determing the frequencies in use on one of my local DMR networks L13-2.1 in Clacton England. So I have all the channels and have identified the CC. From there I moved to single radio monitoring of the CC. All has gone well.

I'm now attempting to use 2 sdr's and implement VC following. RSP2 on the CC and a Nooelec Smart v5 on VC. These are the bat files I'm using

CC.bat
DSDPlus -rc -F1 -i20001 >>CC.log

FMPP-CC.bat
FMPP -rc -i1 -o20001 -f453.1125 -L4 -M30 -v80

VC.bat
DSDPlus -rv -F2 -i20002 >>VC.log

FMP24-VC.bat
FMP24 -rv -i0 -o2002 -g40.2

CC monitoring and decoding is working fine
FMP24 is receiving traffic data and tuning to active frequencies as seen in the command and tuner windows but the VC event log and source audio windows are blank and there's obvioulsy no decoded audio.
The VC DSD+ command window reports
Initiating FMPx link using link ID 20002.....
FMPx link error = -5
[Server is not listening on selected link ID]

I'm sure it has somethng to do with the i and o addresses but I'm stumped. Any suggestions?

Regards

Noel

 

[cg]

I haven't used a double SDR setup since the ability to use a single SDR was introduced but...
Quick look shows a zero missing in FMP24-VC.bat
as posted: FMP24 -rv -i0 -o2002 -g40.2
instead, use: FMP24 -rv -i0 -o20002 -g40.2

 

[mtindor]

A newbie to DSD+, I have purchaed the fastlane option.

Over the last few weeks I've slowly worked through feeding audio via VAC and determing the frequencies in use on one of my local DMR networks L13-2.1 in Clacton England. So I have all the channels and have identified the CC. From there I moved to single radio monitoring of the CC. All has gone well.

FMP24-VC.bat
FMP24 -rv -i0 -o2002 -g40.2

As mentioned already by somebody else, you've got -o2002 when you should have -o20002 in FMP24-VC.bat.

You do realize that you never had to do virtual cables to begin with. You could have used one RTL, or one FMPP instance and could have trunk-tracked from the beginning with voice following, never having to use the virtual cables at all.

With one device it's just (using the pristine included files, not modified and butchered):

FMP24-CC.bat (or FMPP-CC.bat)
1R.bat

Most people run one dongle/device and trunktrack that way just fine. To each his own though. Correcting your 2002 issue should take care of things, as @cg pointed out.

 

[pnoelw]

I haven't used a double SDR setup since the ability to use a single SDR was introduced but...
Quick look shows a zero missing in FMP24-VC.bat
as posted: FMP24 -rv -i0 -o2002 -g40.2
instead, use: FMP24 -rv -i0 -o20002 -g40.2

Thanks cg. As I was climbing into bed last night it occurred to me that there may be a typo. And lo and behold! Corrected it this morning and we have made progress. Thank you for your pointer.

The audio is a bit choppy but that may just be signal strength.

A couple more questions. At the top of the VC event log
- What does NoVF mean? Possibly No Voice Following?
- HighPPMerr - probably high ppm error. Which may explain the choppy audio. The FMP24 tuner window shows a correction of around +2000Hz but the green trace is in the middle of expanded trace window. I'll add a -P in the batch file.

Great programme which has exercised my brain but we're getting there.

Regards

 

[pnoelw]

As mentioned already by somebody else, you've got -o2002 when you should have -o20002 in FMP24-VC.bat.

You do realize that you never had to do virtual cables to begin with. You could have used one RTL, or one FMPP instance and could have trunk-tracked from the beginning with voice following, never having to use the virtual cables at all.

With one device it's just (using the pristine included files, not modified and butchered):

FMP24-CC.bat (or FMPP-CC.bat)
1R.bat

Most people run one dongle/device and trunktrack that way just fine. To each his own though. Correcting your 2002 issue should take care of things, as @cg pointed out.

Hello Mike

Thanks for your comments and suggestions.

When I started out, I wasn't aware of very much at all! The whole concept and nomenclature was very foreign to me. Hence my "Over the last few weeks I've slowly worked through.....". I've been doing lots of reading, making copious notes and incrementally increasing the scope. For a newbie, there's a lot of info here on RR and in the various txt documents, some of it easy to digest, some of it not.

But I am making progress I'm sure there will be plenty more questions.

Regards

 

[cg]

in your folder there is a notes.txt file. This has info for all the releases and is a great source of info via a search in the file. For example:
"NoVF - Trunked voice/data monitoring is blocked"
"Added a "HighPPMerr" display to the event log and channel activity window titles. This text indicates that the PPM correction in FMPA/FMPP/FMP24 is not adjusted correctly. Adjust PPM value in FMPx with p/P keys to eliminate the error display."