DMR Repeater has Intermittent Dropouts
Posted: Tue Aug 30, 2022 10:52 pm
I have a new DMR repeater at a local site and am experiencing intermittent dropouts on the RF side. The repeater is currently a pair of Motorola Radius, but the issue is identical when the MMDVM/rPi is connected to a MICOR Mobile. The issue also occurs on a dummy load (with or without the duplexer installed.)
The issue occurs when a user is on RF and is having an ongoing conversation. Within 10 minutes or so, the repeater will stop responding to the user on RF, but any network traffic continues to be heard. Switching TGs or TS has no effect, but the repeater starts to operate normally within a minute or so. This also happens when users are on Local 9.
Hardware is a Repeater-Builder MMDVM board with a rPi 3B+ and/or a rPi 4 (depending on which repeater I'm working on at the time). SD card has been reflashed multiple times. Internet is cellular with what appears to be a very good signal.
Today, the repeater was running multimode (DMR/DSTAR/FM) but don't think it matters if it is stand-alone DMR or multimode... but I turned off the other modes anyway.
A portion of the MMDVM.Log file is uploaded to http://wm4b.wikidot.com/local--files/files/mmdvm.txt. AE4XO was coming in on the network and KE4LRS was on RF. Eventually, KE4LRS was unable to get in on RF and switched to another repeater. You can see where this happens.
It looks to me like bad things are happening in that log file, but I don't really know what I'm looking at; I'm a hardware guy - not a programmer. I'd really like to get this working and so far hacking around has been fruitless; I really need someone who knows what they're looking at to guide me.
Mike
WM4B
The issue occurs when a user is on RF and is having an ongoing conversation. Within 10 minutes or so, the repeater will stop responding to the user on RF, but any network traffic continues to be heard. Switching TGs or TS has no effect, but the repeater starts to operate normally within a minute or so. This also happens when users are on Local 9.
Hardware is a Repeater-Builder MMDVM board with a rPi 3B+ and/or a rPi 4 (depending on which repeater I'm working on at the time). SD card has been reflashed multiple times. Internet is cellular with what appears to be a very good signal.
Today, the repeater was running multimode (DMR/DSTAR/FM) but don't think it matters if it is stand-alone DMR or multimode... but I turned off the other modes anyway.
A portion of the MMDVM.Log file is uploaded to http://wm4b.wikidot.com/local--files/files/mmdvm.txt. AE4XO was coming in on the network and KE4LRS was on RF. Eventually, KE4LRS was unable to get in on RF and switched to another repeater. You can see where this happens.
It looks to me like bad things are happening in that log file, but I don't really know what I'm looking at; I'm a hardware guy - not a programmer. I'd really like to get this working and so far hacking around has been fruitless; I really need someone who knows what they're looking at to guide me.
Mike
WM4B