have been listen a lot and i got think how to you guy's know when there is a new talk group number . i know i am new and learning i whish i knew the rope like all of you thanks ghostdog
There are several of us who use a program called trunker. It decodes the control channel information and shows every TGID as it hits the tower it is listening to.
Rolfman has given you the most used way of knowing today, but before that type of program was used it was a system of know your departments. We would scan in open mode so that any and all TGs on the system would be monitored. We have been listening long enough we know when one or two sounded out of the ordinary. We'd quickly jot down the TGID displayed by the scanner, check the
Utah Database to see if that TGID had been placed there already. If it hadn't then it was a pretty good chance it was "unknown" or new and needed to be identified.
Programs like UniTrunker have definitely made finding new TGs much easier and
gldavis is one of the best in finding them with others quickly closing the gap.
Since the Cache Valley changed over to UCAN,
wbloss,
gadgetmikey and others have been busy finding newly assigned TGs and getting them in the Database.