I live in a small town served by Comcast who took over one of the poorer legacy cablecos many years ago. Reports are we are on a low hz (750???) system here. Anyway....in order to have some TV when cable dies from a power outage (happens here on CT shore a lot), I recently erected a 110" Antenna in my garage attic. So I tested my signal and it seemed fine on the key network channels, in fact it looked really good. So then I go and tune the same channel on cable and holy cr--! My antenna signal is sharp and clear with up to 6" or so, but the cable signal has completely collapsed at 3 feet out. Jagged lines, blurs, smeary faces you name it. Are all of you getting this kind of a junk picture for your $100+ a month from Comcast or am I one of the "lucky" ones??? Anything I can do?