I am a new scanner user and I am having some difficulty in programming the Uniden BCT15X. I would like to listen to Sno-Com dispatch. They are located in Snohomish County Washington State, part of SERS. I programmed the system frequencies and then I tried to put in the TGID for the specific channels. My Uniden said it was a bad TGID. I tried several other TGID without success. My scanner is working and scanning some of the channels I want, I would think if I can figure out how to connect the TGID's it would make it so I could set some priority scanning. Any help I can get would be greatly appreciated. These new scanners are nothing like the ones in the 1980's.