I am using a PRO 97. I have all of the DPS frequencies for the Bryan area plugged into their own channel. The only thing I hear is the Bryan Base on 155.460. Are all the other channels encripted? Yesterday I was within 1/4 mile of a DPS car on a traffic stop(no it wasn't me) on Highway 6 and could not hear anything, even though I could see the trooper talking into the mike. Anyone have any ideas?