how come when i'm listening to a trunked system, it sometimes cuts out in mid-conversation. it's not a problem with my scanner, because both of mine do that. and it doesn't sound at all like a reception problem (i get very good reception, and when it does this, it just cuts off with out any static). the conversation doesn't start again until it changes frequencies. i know the police still hear each other, so how come i can't. this rarely happens, but i'm just curious. any ideas?