Sacramento county (police, fire, etc) is largely on
this P25 system. It is a trunked system. I highly recommend using software to program your radio. You'll find a lot of information regarding trunking, your radio, software to program it and many other things in the Wiki here. I also feel the need to mention that the Sacramento P25 system is a "Simulcast" system. The reason that I mention it is because your radio won't properly handle signal reception (YMMV). Just know you could be missing calls and/or stuff will sound garbled -- kind like it is encrypted but it isn't.