What exactly is CONTROL CHANNEL ONLY MODE? When you have a radi oscanenr that is capable of doing this MODE, then will you hear any audio activity on a talk group or just see the talk groups light up. Casue if this is the case then you can do this with a Pro-92 also by just letting it sit on that anoying computer frequency. HAPPY BIRTHDAY TO ELVIS AARON PRESLY. 68 YEARS OLD, THIS YEAR.