Just came here to check on this. We have three channels (in Fairfax Co., VA) -- 70-72 -- that intermittently pixelate to the extent they are unwatchable. I saw a post earlier today that suggested this could be caused by a household electronic device (microwave, etc) that's active on the same frequency as the affected TV channels. The question is, how to track down the offending interference source. How can I find out what frequency range channels 70-72 are using? And is there a tester device (on Amazon or wherever) that can detect radio waves at a specified frequency?
Alternatively, is it possible to shield the cox wiring where it's exposed so as to block or reduce interference?
Thanks!