I have a, new to me, Radio Shack Pro-197. Got it set up and is scanning. My local sheriff dept is "Project 25 Phase I", and I receive them very well, but I am also receiving another signal on their freq that is all garbled gobbledygook and not understandable. Have no idea what it is, but the transmissions are very long, so I am missing a good portion of the local signals. Does anyone have any idea what I am up against. Although my radio communication knowledge (ham & military, and public service) goes way back to the 1960s, this digital stuff is all new to me. Any help would be appreciated.