TRX-1: Find digital control channel with TRX-1
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tvengr
Well Known Member
Which system are you trying to program? If you attach your configuration file, I will check it for problems. Click on Attach files and Open the file.
Generally speaking, the Whistler (TRX1 & 2) will only stop on digital channel (control or otherwise) if it detects voice activity. In this way the user doesn't have to keep manually restarting the scan each time a data signal is present. The old MPT 1327 analogue was a right pain in the backside 
Data transmissions cannot be decode anyway, so there's little point in the receiver stopping on them. With DMR at least, no human usable data is sent, so you won't get frequency, encryption key info etc even if you were able to decode it.
Data transmissions cannot be decode anyway, so there's little point in the receiver stopping on them. With DMR at least, no human usable data is sent, so you won't get frequency, encryption key info etc even if you were able to decode it.
If you're looking to input a frequency manually for the specific purpose of looking at control data, consider "tune mode". See here
So there's nothing I can do to hunt for control channels huh?Generally speaking, the Whistler (TRX1 & 2) will only stop on digital channel (control or otherwise) if it detects voice activity. In this way the user doesn't have to keep manually restarting the scan each time a data signal is present. The old MPT 1327 analogue was a right pain in the backside
Data transmissions cannot be decode anyway, so there's little point in the receiver stopping on them. With DMR at least, no human usable data is sent, so you won't get frequency, encryption key info etc even if you were able to decode it.
You need to enter the trunking system you are trying to monitor in your area. You really don't search for a control channel.
wiki.radioreference.com
Trunking Basics - The RadioReference Wiki
tvengr
Well Known Member
If you let us know which system you want to monitor, we can help. If a frequency you find has a continuous buzz, it is most likely a control channel.
is this system unlisted in the Radioreference database & you're trying to figure it out? If so, can you post the license or agency? City? State? Country if different than USA?
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The Uniden 396XT has this exact feature, in custom band search mode you can search for only P-25 and I believe Moto Type II control channels. When it hits on a CC, it displays the Site/system info and eventually begins decoding talkgroups. For some reason they removed this feature from the newer Uniden scanners (I really don't get why). I'm not sure if any other scanners supported this feature but it was a cool idea.You need to enter the trunking system you are trying to monitor in your area. You really don't search for a control channel.
Trunking Basics - The RadioReference Wiki
I sometimes use this feature when I'm traveling through an area I don't frequently visit, to confirm which control channels I can receive from a particular location.
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