Police and Fire:
Eloy Police Department Dispatch, frequency (154.160).
Eloy Fire Department Dispatch, frequency (154.085).
Dispatch center is located in Eloy, Pinal County, AZ.
Toshiba Satellite running Ubuntu 14.04 OS.
Radio Shack Hand Held scanner Pro 404.
The noise is comming from the Police transmitter. It sounds like the transmitter is locked on all the time. No matter how high I set the squelch I can not get rid of the noise. In order to provide both Police and Fire reception I have set up the scanner as follows. Fire is the priority, Police is the other scanned channel. Every two seconds the scanner will jump to the Fire channel and test for traffic. If no traffic then the Police channel is monitored. Thats where the popping noise comes from.