DSDPlus 2 SDRs on NXDN/DMR Trunked Systems

[jake_Braker]

I'm trying to monitor some local Tier III systems in my area, however I had to purchase a second SDR to be able to extract audio. I believe I got the second SDR setup to monitor voice traffic, however, I can't actually monitor. Looking at FMP24-VC, it doesn't activate when a VC goes active like I've seen on some youtube videos.

I'm hoping this made sense and y'all are able to help,

 

[jake_Braker]

All the monitor digital modes are activated, I'm currently testing it on FleetTalk Carolina's Newport site since I can guarantee activity on that site every couple of minutes

 

[jake_Braker]

I did notice the top of the VC Event Log also says "NoCCH" and "NoVF" would this be negatively effecting anything?

 

[R0am3r]

Why are you using two SDRs? Can you use one? I'm not familiar with FleetTalk so I don't know the bandwidth required for the system. Here is a simple batch file for monitoring a NXDN system with one SDR:

Start CMD /c dsdplus
Start CMD /c FMP24.exe -o20001 -P0.0 -f150.8675 -b4 -g14.4

 

[jake_Braker]

I've attempted with 1 SDR in the past, however both FleetTalk, Charleston Wireless and Carolina Connect all require a second SDR to monitor VC traffic. I really don't know anything about SDRs so that's why I tune into the experts (y'all)

 

[jake_Braker]

Start CMD /c dsdplus
Start CMD /c FMP24.exe -o20001 -P0.0 -f150.8675 -b4 -g14.4

I'm not following what you mean by this part of your message though.

 

[RaleighGuy]

I'm not following what you mean by this part of your message though.

Those are the BAT files to start the program, one for FMP24 the other for DSD+

 

[R0am3r]

It was a simple batch file. You can create your own batch file or run FMP24 and DSDPlus from the command prompt as shown here:

C:\DSDPlus>DSDPlus

You also need to start FMP24. For this example, I substituted the actual frequency of the Newport control channel. Hopefully this makes sense to you.

C:\DSDPlus>FMP24.exe -o20001 -P0.0 -f461.9625 -b4 -g14.4

 

[Kazzaw]

This will work fine with 1 or 2 SDRs, that's not your issue here.

You have to program the DSDPLUS.FREQUENCIES file for TIII and NXDN as the control channel doesn't provide frequencies for the voice channels like P25 does

I can tell this is your issue because next to the Ch in the VF window there is nothing under frequency - so it doesn't know where to push FMP24 VC when a channel is granted