DSDPlus CC Tracking but no VC

[dave3825]

@wirr posted this a year ago and quite possible they added freqs to the system. Have a look at those 2 licenses and see what freqs are listed.

System S1 Jefferson County new DMR Tier III radio system

1 Louisville ch 23 151.1225c color 7 NL 5 KNJN405
2 Wadley 154.4225c color 8 NL 1 KNJN405
3 ch 63c
4 Louisville ch 3 156.1725c color 0 NL 1 3 5 WRTM259
5 Wrens ch 11 155.6700c color 0 NL 1 3 4 WRTM259

TG 102

 

[dave3825]

What version of DSDPlus are you running?

Okay, so even though its an "error" it will not be causing an issue. Cause once it's tracking correctly then we can find the Radio and their Alias

Correct

I have two dongles with now two antennas. When I turned the gain to 0 on VC and CC it became clearer. I think my signal was just so strong where I'm sitting that any amount of gain was too much.

How close are you to the site?

 

[tehanners]

I'm running the newest version of Fast Lane

Thank You

The Louisville one is probably less than 3 miles as the crow flies.
The other sites are easily 15 to 20 miles. And I'm inside a building with its own antenna that seems to cause some interference.

 

[tehanners]

I finally got clear audio. I had to switch to Combined CC/VC Monitor and now the audio is clear. Is it possible running all 4 of the FMP24-CC, DSD CC, FMP24-VC, and DSD VC is too much on the CPU causing the cut out.

 

[dave3825]

Certainly possible. You could run single dongle mode.. 1 Fmp24 & 1 DSDPlus.

Single-dongle monitoring:

To use a single device, run the 1R.bat file to start DSD+,
then run the appropriate batch file for your device:

DVB-T dongle: FMP24-CC.bat

Airspy: FMPA-CC.bat

SDRPLay: FMPP-CC.bat

DSD+ and the FMPx SDR software (FMP24, FMPA or FMPP) should start talking to each other
and raw demodulated audio waveforms should be displayed in DSD+'s Source Audio window.
The Windows Firewall may prompt you to allow FMPx to act as a server / accept connections;
click the check boxes to allow FMPx to function properly.

Tune your SDR by left-clicking in the FMPx RF spectrum window or by using the left/right
cursor keys or by directly typing in a radio frequency (in MHz) and pressing Enter.

Pressing '?' will list all of the FMPx keyboard commands in the FMPx console window.
Commonly used commands relate to RF gain levels, tuning step sizes and channel filtering
bandwidths.

If FMPx is tuned to a conventional digital voice channel,
DSD+ will decode any unencrypted digital voice that is present.
Use the DSD+ menus to ensure that DSD+ is sending audio to your PC speakers.

If FMPx is used to monitor analog channels,
select "Monitor Source Audio if No Sync and Signal Present" in the DSD+ input menu.

If FMPx is tuned to a P25 control channel, DSD+ will automatically start trunk tracking
and decoding unencrypted Phase I and Phase II voice traffic.

For some NEXEDGE and Tier III control channels, DSD+ will automatically start trunk tracking.

For most NEXEDGE and Tier III systems and for all Capacity Plus and Connect Plus systems,
accurate channel data for the site being monitored has to be added to the DSDPlus.frequencies
file to enable trunk tracking.


If you have a second SDR device, you can run the 1Ra.bat file and the appropriate FMPx-VC.bat
file and simultaneously monitor a second trunking system or site or conventional channel(s).
To manually tune VC FMPx, press Esc once to take FMPx out of VC mode.

 

[tehanners]

Thank you for that link! It’ll be most helpful

 

[MissouriMule]

I was wondering if someone could tell me what vc stands for I was only assuming that it was voice control or channel it popped up instead of cc and I have no sound on the trunked system.
Sorry if I posted in the wrong place.
So. Please forgive me.
I don't see well and just trying to straighten things out.

 

[tehanners]

Absolutely.

VC is the Voice Channels. They are the frequencies that correlate to certain LCNs or LSNs that voice is transmitted on in a Trunking System.

The CC is the Control Channel. It is the gate keeper of Trunking Systems that tells any radio on a TG which VC to move to for communication.

If you are keyed in to a CC on DSD+ it should track to the appropriate VC automatically. If keyed into a single VC you will only hear every other to potentially every 5th or more transmission. If listening to one VC the reason you’ll not hear every communication is for the fact that with a trunking system each time a PTT is keyed it rotates to the next available VC.

 

[MissouriMule]

Absolutely.

VC is the Voice Channels. They are the frequencies that correlate to certain LCNs or LSNs that voice is transmitted on in a Trunking System.

The CC is the Control Channel. It is the gate keeper of Trunking Systems that tells any radio on a TG which VC to move to for communication.

If you are keyed in to a CC on DSD+ it should track to the appropriate VC automatically. If keyed into a single VC you will only hear every other to potentially every 5th or more transmission. If listening to one VC the reason you’ll not hear every communication is for the fact that with a trunking system each time a PTT is keyed it rotates to the next available VC.

Thanks

 

[tehanners]

Not a problem, I’d be glad to answer any other questions you may have. Just send me a message if need be.