I think it’s the distance. I’m much closer to the Rockford Towers so even though it’s outside of the sweep the signal is strong. I really can’t say enough about this antenna. 58 mi from Chicago Towers and the Stations are solid. There are days when I pull in a Milwaukee Station 93 mi away. My neighbor was so impressed he bought one. He was getting 23 Channels with his first antenna and that jumped to 54 after he bought one of these. Mine is mounted about 12’ up on the Porch Eve. I’m sure If I put it up on the Roof which would bring it to about 35’ I’d do even better. I do thank you for the recommendation on the KT-500, it Rocks. I was just watching that Rockford Station I had problems with before I put it in and noticed it started cutting in and out. I checked the KT-500 and saw the Overdrive led flashing and backed the Gain down. Perfect! Again, could I add another Antenna to accommodate the Tablo? Yes. Am I going to? Nope. The way it stands now, it’s working perfectly just the way it is and the direction it’s pointing. Can I watch that Channel without pixilation? Yes. Can I record it with the Tablo? No, not without a botched recording.