I don't have the freq off the top of my head but the PD is on 800MHz conventional. They have the option of analog, P25, and P25 coded DES-XL. I know that the PD on the campus does use encryption but it's selectable both on the console and radios, unlike the County where it's strapped.
I see if I can locate the freq, for some reason 868.575 or close to that rings a bell, its a CA DGS freq. A few others here..Mick??? might have the right freq. Related to CSUF, the PD/CSO's at the old El Toro base were using one of the CMARS 800 channels to talk back to dispatch. I don't know if that's still the case or not.
-M142