Re: [adrianh] police scanners???
You should look into digital trunking systems... (Basically, large municipalities use a radio system where limited frequencies serve multiple channels - every time the radio needs to transmit - the radio finds one of the frequencies in the available pool that is not used at that specific moment - with the theory that many, many channels can be broadcast on limited frequencies because not every channel is being used simultaneously.)
This means, scanners are difficult at best - because every transmission could be on a different frequency.
Also - with the modern age of computers, a lot of dispatching occurs on laptop screens and GPS systems where the dispatcher can send info to the nearest cop.
Simple solution.... Date a 911 dispatcher who can send you a text message with a code word... I hear some of them are cute.