reply to blu87
Re: Signal problem again, I think
said by blu87:One other thing that would be good to know is what the frequency is for that QAM-256 video carrier, compared to other channels that are coming in OK
But what about the numbers I provided? Does that tell you anything? Or do I need to post more info?
If you use a cable modem, it would also be good to see what the channel frequencies and levels are for that.
Old, weathered coax cable and splitters that may have managed to work OK for analog TV, can be a problem for digital TV and other services, since the analog channels were typically located at lower frequencies/channels received by older "cable-ready" TVs, while many of the new, added-on digital carriers were placed at higher frequencies.
Just replacing any older, low-quality splitters that you may have installed yourself with newer, higher quality ones (see: »[Connectivity] Recommended splitter) may resolve your problems.
Also take a look at these two recent threads, from other posters who were also having video issues, for some additional info/ideas:
»Poor picture quality
» Do I need to get an amplifer and active return?
EDIT: Given your latest post, I realized that I originally misunderstood what you meant by TV "2" and "3" (not channels, but sets). Modified my post based on that.