I just got a uniden bc355n for my jeep. I've learned how to program it and I'm starting to learn. Question is can I make it only scan my programmed channels? It's picking up alot of frequencies and coming in as static in and out with no audio. I hit the lo button but it continues to scan and picks up alot of garbage I don't want to listen to. I would rather it only scan the 30 or so channels I have programmed into it.