I tweaked mine this weekend.
I typically monitor an 800 mHz trunked system.
I had the Full Spectrum Scan range set at 851.0125 to 865.9875.
I realized that the highest frequency in that system was 860.9875.
So, I changed both the frequency range AND set the WACN ID to FFFFF and System ID to FFF.
Before I made the changes, it would take a while and then I would sometimes get no systems found or whatever the message was.
Certainly, looking through only 10 mHz of spectrum rather than 15 mHz has helped, but I think in my case the WACN ID and System ID settings
may have helped, too.
I am somewhat tempted to try either just the WACN ID or just the System ID to see what the result are.
I am just curious, if anybody here is using just one of the specific settings and not the other, which works better and why?