Originally Posted by tvlurker
if there is a gross problem with the cable wiring or terminations
or also... if the TV receiver itself (and circuitry inside) are not sheilded very well from signals from the outside.
In Ottawa, on analog cable, a while ago (maybe a year ago), the cable providor moved
PBS - the Public Broadcasting channel, from analog cable 64 to analog cable 97.
[PBS remained on digital cable 64 ... but that's not related to my point here.]
Guess what? Analog cable 97 is in
or very near
the FM band (!)
I have a small older CRT TV, and PBS on analog cable ch 97 on this TV has some picture interference. I assume this is some FM signals interfering - thru the TV (not the coax cables or connectors).
On a different TV receiver, same place, off same splitter - the picture is more clear - on analog 97.
I assume the difference is due to interfering signals (FM?) getting into the small CRT TV or it's internal circuitry ... more.
Are consumer TV's well sheilded these days ? In older days?
So here is an actual real example, I believe, where external signals are degrading the picture ... interfering with cable tv signals
Not that much ... still pretty viewable ... still ok... but enough.
It's real ... it happens.