TRX1 or 2e DMR Tier 3 needs to use wildcards, not on capacity +

[pyeman99]

@Ubbe maybe you can tell me.
On T3 I have to enable Wildcards in Trunked Radio Systems tab to recieve.
Cap+ is ok without & still displays site, unit ID & recieves audio fine.

 

[fourwd1]

@Ubbe maybe you can tell me.
On T3 I have to enable Wildcards in Trunked Radio Systems tab to recieve.
Cap+ is ok without & still displays site, unit ID & recieves audio fine.

The TRX-1 does not 'trunk track' a DMR system . If properly programmed it will receive and ID TGs (as you seem to see), but will not 'track' a TG. If I have it wrong I'm sure I'll be corrected quickly.

 

[hiegtx]

The TRX-1 does not 'trunk track' a DMR system . If properly programmed it will receive and ID TGs (as you seem to see), but will not 'track' a TG. If I have it wrong I'm sure I'll be corrected quickly.

You are correct. None of the Whistler scanners, including the TRX-1 & TRX-2, can actually trunk track a DMR (nor NXDN) system. The Uniden scanners, with the paid upgrades, can trunk track those modes because part of the upgrade's cost is related to the licensing costs required to allow true tracking of the systems.

You can enter the talkgroups of interest, including a wildcard if you do not know all of the TGIDs, but the scanner will not actually follow and track a specific conversation. When a conversation ends on a specific frequency, the scanner moves to the next programmed frequency, and will pick up a conversation there, but it will not look for, and follow, a specific talkgroup.

While the Whistler scanners do not track a conversation, they do allow you to program a specific frequency as a conventional channel entry, and also specify (if so desired) a talkgroup, slot number, and color code. For Uniden scanners, you can only specify a frequency and color code when programming as a conventional channel entry. If you also want to specify a talkgroup, and/or slot number on the Uniden scanners, you have to use the One Frequency Trunked (OFT) system type.

 

[pyeman99]

Owned Trx's for a number of years. Yes know about the limitations of them re tracking trunked systems.We only have DMR here. The point was why on Cap+ systems you don't need to use a wild card in the Trunked Radio tab. Each channel is programmed with a wildcard for CC TS TG. ie OFT. Yet on a Tier3 system you also need to use Wildcards PV & GP in the Trunked radio tab. Can send config if you want to take a look.Main reason of asking is that the display is cluttered when a mobile comes up on T3 & the word wildcard is shown, PVT or TG is fine. Thanks guys. Keith

 

[Ubbe]

When a conversation ends on a specific frequency, the scanner moves to the next programmed frequency, and will pick up a conversation there, but it will not look for, and follow, a specific talkgroup.

It will move to the next active frequency that has a voice call and look at what TG that are active and if it doesn't match the one you are following it will go to the next active frequency in the site list and will continue to cycle the site list until the delay timer for that TG times out.

If a frequency have data signalling it will take some 60mS to confirm if it's a voice channel or not and a total max time of something like 360mS for each channel (15mS if it has no carrier) to find out what TG that are active depending of when the superframe are sent in the datastream. If 3 channels are active with voice calls, and the rest of the channels are idle, it will take at most one second to find the correct conversation. If the stars align and you hit the superframe at each channel shift it will take 180mS to check those 3 active voice channels.

When scanning voice channels instead of monitoring the control channel it will find all current private calls that only exists on the control channel for the time of a superframe and a Uniden scanner needs to be on the CC at that exact moment to catch any private calls.

/Ubbe

 

[Ubbe]

The point was why on Cap+ systems you don't need to use a wild card in the Trunked Radio tab.

I've never noticed that as I always enter a Wildcard and set an extra long delay time to it, 20sec, and some specific alert and LED lights. Then all known TG's gets a normal delay time of 5 sec.

/Ubbe

 

[pyeman99]

Thanks for explaining will look into time delays & change some setting.
This ties up with seeing "Wildcard" coming up in the display but not always.
Certainly if I don't put wildcards Private & Talk group in T3 you can scan very active channels & see/hear nothing.
Will have a play. Keith

 

[fourwd1]

I've never noticed that as I always enter a Wildcard and set an extra long delay time to it, 20sec, and some specific alert and LED lights. Then all known TG's gets a normal delay time of 5 sec.

/Ubbe

That's pretty much the way I do it as well. The few DMR systems I listen to don't have many TGs to begin with, so they're easy to follow.