Hopefully someone with DMR trunking expertise can weigh in. When I looked at the licensing information, I recall that there were 100 mobiles/portables listed and that the system appeared to be run by an outside provider. I also thought I saw a reference to a control station of some sort too. Given that scale, I'm assuming it is a trunked system but it certainly doesn't have to be. Knowing whether DMR trunking systems use a dedicated control channel or not might be useful.
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Commerical Monitoring of DMR
- Thread starter n8mrc
- Start date
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Yes DMR trunking uses a control channel. Motorola Capacity Plus is similar to LTR trunking where there will be short bursts on the rest channel and it will move around the various frequencies in the system. Connect Plus / Tier III trunking uses a dedicated control channel similar to P25 etc.
If you are seeing signal on the radio but aren't getting audio it should be one of the issues already suggested:
- Color code, group code or time slot is wrong
- possibly encryption, but you would likely hear it
- RX and TX frequencies need to be different for the channel (even if it's set to RX only)
- programming issue with RX group list (proper list assigned to channel? Proper talkgroup in the list?)
And it's a longshot but needs to be eliminated... are you sure it's DMR digital? Could be NXDN, dPMR etc etc. As mentioned a dongle with DSD+ would help you out a ton...
If you are seeing signal on the radio but aren't getting audio it should be one of the issues already suggested:
- Color code, group code or time slot is wrong
- possibly encryption, but you would likely hear it
- RX and TX frequencies need to be different for the channel (even if it's set to RX only)
- programming issue with RX group list (proper list assigned to channel? Proper talkgroup in the list?)
And it's a longshot but needs to be eliminated... are you sure it's DMR digital? Could be NXDN, dPMR etc etc. As mentioned a dongle with DSD+ would help you out a ton...
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