I have both a Radioshack Pro106, recently purchased. And a GRE PSR 500, I've had for a few years. Unless I'm missing something. I can't find a way to monitor talkgroups I've programmed in the radios, and that's it. I live near Seattle Washington. And I don't want either radio picking up every bit of voice traffic on the Seattle/King county TRS from talkgroups of absolutely no interest to me. Is there a way to get both radios to only scan talkgroups I've programmed, and that's it?