i have a RS PRO 94 i live in madison wi. radio shack prog. the scanner for me with there software. the only problem is it took almost 600 channels up. now im getting everything from city trash the city transit, DPW. IS THERE ANYWAY TO BLOCK THESE OUT BUT STILL BE ABLE TO HEAR THE CITY PD AND FIRE? THEY OPERATE ON A MOTO-2 TRUNKING SYSTEM. PLUS IM NOT SURE IM GETTING ALL THE CHANNELS FOR SOME REASON. EVERYONE ONCE IN A WHILE I HEAR THE EAST SIDE UNITS. AND I KNOW THEY ARE ALOT BUSIER THAN WHAT IM PICKING UP. PLEASE HELP! I HOPE THIS MAKES SENSE. ONE MORE QUESTION HOW DO I KNOW WHAT CONTROL CHANNEL TO USE ? AND WHAT THE HECK IS IT.