I have searched the forum and don't see anything related to my question but please forgive if I missed something. After years away from scanning, I purchased the SDS100 a week ago and feel pretty comfortable programming it in Sentinel. As a Chesapeake, VA resident, I am interested in scanning some City departments/talk groups. Of particular interest is the Utilities Department for the City. I set up a Favorites List for this department, which includes 6 talk groups- all of which appear in my Favorites List (701, 703, 705, 707, 709 and 711). I know these systems are active but I am only picking up traffic on the 703 talk group...absolutely nothing on the other 5 groups. There is no indication in RadioReference.com about these 5 talk groups being encrypted so it seems that they should be registering hits just like the 703 talk group. I have searched far and wide to try and understand why these 5 groups are not coming through. Can any of you offer some feedback as to what I may be doing wrong? Any assistance will be greatly appreciated.