Actually, it sounds like they're doing coverage testing and are calling the test frequencies Red and Blue. 88 (or whatever) could either be an RSSI reading or a dBm reading; dBm is usually in negative numbers (unless the signal really stinks) with 0 dBm about equal to 224,000 microvolts. A really good signal would be around -113 dBm (or .5 uV).I have it programmed on NWORPSS 854.7125 TGID 10588
Would be saying Radio Service .. Blue Channel, Area 142, 88 .. someone repeated it back. A minute or two later, the same process, but both numbers changed each time, or it was Red Channel. Went on for a couple hours.
Wondering if maybe City Fire is joining the PD on TRBO units??