I have a pro97 and used win97 to set everything up. Every few minutes it seems to get hung up on one of the control channels that sounds like a machine gun. (sorry for the lack of terminology) I have checked all the numbers to make sure I have them right and the squelch is set almost all the way clockwise. Is this due to a freq. that is too weak to hear or did I do something wrong? I'm scanning the analog stuff in Maricopa County, Arizona. Motorola type 2 SmartZone. Thanks for any help.