I have a location up in Chattanooga, TN that only gets CBS HD when it isn't broadcasting in HD. We are using a Sammy TS-160 receiver hooked up to an off-air antenna and a channel master 3xLnB dish. I believe the antenna is the second to larget size. There are several building surrounding the location (nothing that really towers over it), but they could cause an issue. I just wanted to see if any one has had a similar problem.