Hello,
I follow a DMR Tier III Motorola Capacity Max Trunking system and have seen the following issue:
You start the system, and it's fine, but after a while, say a day or so, it loses the sync with the control channel and does not follow it anymore. It shows idle until you restart the trunking channel you are monitoring. It still repeats, a day or so, and it's idle and not following again.
The system I am monitoring is somewhat distant, but it is still adequate for monitoring. Power can sometimes drop to around -30, but most of the time, it remains at -26 or lower. In this case, when I restarted the channel, it was at -20, which is a good signal reception from the tower I am monitoring.