Its a "patch" for 7152. 7152, 1bf A SCHP 3 KRSHW Ch 03 Kershaw/Lee Law Dispatch. They use these for other areas to take over the functions when personnel are on vacation, maintenance on the radios or console, etc. The TG numbers increase by three when this happens, normally. If a TG number is divisible by 16, its a good TG number. If not, subtract 3 and divide by 16. The number you get should be divisible by 16.
Disclaimer: I don't know if this works all the time for the Pal 800 system.
