Greetings,
The analog system has been gone for a few years now. Most users from the analog system transitioned to the new P25 system. I am not sure if its true, but I had heard that a few users of the old analog system went back to VHF when the county made the switch to the new P25 system. As for the Sheboygan SO being ENCRYPTED, I can't chime in since I am in Milwaukee.
Tim