Control Channel Scan

[kb2ear]

I have been dealing with an issue on a Harris P25 system that every time they change the control channel (was every few months, but has been every day at 21:00 ET the last few days) the system will never lock on to the new control channel and just keep scanning them all (the system has 16 of them). The issue appears to only happen when control channels cross the SDR boundary between sticks.

Even if the trunk-recorder is restarted, or the system rebooted, as soon as you cross between "System Source 0" to "System Source 1" it will never lock on to the control channel and just keep scanning forever, so I have to find the current control channel and move it to the top of the list then it will work fine until the next control channel change. It takes 6 SDRs to cover the 700+800MHz frequencies this system needs so it's going to cross between Sources.

I have also seen the same thing on Smartnet systems before but they don't change control channels unless something breaks. It has been a problem from when I started on this system in early 2020 and I am running the current master commit.

if it matters the system is: https://www.radioreference.com/apps/db/?siteId=19559

[robotastic]

yea - let me setting up some testing. I have noticed that it is not good at switching SDR sources for a control channel, even though it is supposed to.

As a clunky work around, I have been using the "controlWarnRate": -1, config setting to quit when the control channel changes and then starting using a different control channel:

https://github.com/robotastic/trunk-recorder/blob/master/examples/auto-restart-wmata.sh