Conventional Encrypted UHF T BAND channels for right now I hear them when I'm in the city at work nothing is in the clear though. I have also heard rumors that they also use the cook county sheriff system but I cannot confirm that as the entire system is encrypted. I suspect they will come back encrypted when the CPD phase 2 system is working citywide. The good old days of hearing chicago investigations are over if it's not on the zone you not going to hear it.
Sent from my SM-N910V using Tapatalk