hello im trying to set up my uniden 996. i have the tone out codes. i want to monitor christiana mill creek and a few others, which ones do i put in aa to ab ba to bb etc. not sure which ones to put in also which frequencie do i put in for each fire co. are they all diffrent frequencies or does one do them all. ive tried setting this up before but have had no luck never heard anything. can someone please help me out on this. i would like to hear what this sounds like. i see on the tone outs that there are fire calls, ambulance, etc. what does this all mean. any help on getting me set up would be great thanks in advance. i think uniden only allows 10 set ups. can they all be scaned at the same time. thanks again.