recieve

Hello to all, I am not new to communication receivers, I have a (ok) idea of the inner and outer workings of my radio(s) and I have had my 396XT for a few years not having any problems with it.:D Now for no reason it will not receive ANY signals (other then and occasional high pitched sound in...

I have tried several times to hear my local police and fire dept. to no avail. I am sure that they are using NXDN but all I hear is the control channel noise. Am I doing something wrong or am I wrong in assuming this scanner should pick up the frequencies?