How can I know if I might be missing calls on a P25 system?

[Erik Swan]

As in the title, what are the things I can look for to know whether I am receiving all the calls that are occurring on the system, or whether I might be missing some traffic (for whatever reason)?

I am new to trunked radio and sdrtrunk but from what I've been able to understand so far there are two main reasons it's possible to miss calls on a P25 system with sdrtrunk:

1. Traffic is occurring on a frequency that is outside of the current sampling window of the tuner(s). Since sdtrunk is designed to stay locked on the control channel at all times, if there is traffic occurring on a frequency outside of the current window that the SDR is tuned to and tuning to that new channel frequency would cause the control channel to fall out of the window, it will not be able to tune to the new channel grant frequency and whatever traffic is occurring will be missed.
   
   
2. Reception is poor, causing errors in decoding the control channel or traffic channels and therefore potentially missed calls.

It seems like #1 can be detected by looking for `CHANNEL START REJECTED` messages in the control channel event log, and #2 can be detected by looking for `CRC-FAILED` or `SYNC LOSS` messages in the control channel decoded messages log.

Is that correct? Is there anything else to look out for?

Regarding cause #2, it would be nice if we could get some sort of bit error rate measurement or similar in the GUI to give us a general idea of how many decoding errors we are getting and whether that might be resulting in missed traffic.