wrote:
Brief update:

New splitter has arrived, mailman stuffed it into the mailbox.

New splitter installed, green cable is hanging a bit though.

Did not help.

TV Signal is now even worse and more noisy.

When thing I forgot to mention is that one TV channel the frames move back and forth...

Are you sure that analog TV is "enabled" on your line ?

https://en.wikipedia.org/wiki/Cable_television_piracy

"Old cable equipment used an analog signal that was
scrambled by tuning the signal so the picture was
unsteady, just as Macrovision does at an attempt
to copy a video. The equipment would descramble the
signal so that it can be viewed by the subscriber."

It's possible that's done by shaving off the sync tips.
Or inverting sync.

In the picture here, "0 IRE" is the DC restoration level.
It is the "zero volts" level established by one stage of the video
processing steps.

The sync tips are below zero volts. It the sync tips don't
go quite as far below 0 IRE, the TV can "lose sync". It's
possible a set top box your provider has, restores sync.
Sync tips are known as "blacker than black", because they
go below the 0 IRE "black" level.

https://www.maximintegrated.com/en/i.../DI39Fig05.gif

( from https://www.maximintegrated.com/en/a...dex.mvp/id/734 )

But that's a very old technology. Over here, all TV is
digital on the cable, and encrypted so only a Cable Card
device can decrypt it. I doubt there is any analog
signal left here, so you would not have an opportunity
to see a "rolling" or "weaving" frame on a cable TV set
today. You would see "snow" instead (encryption looks like
various kinds of snow).

*******

My guess is, your line needs to be verified by a cable person
coming out in a truck and checking the line. And checking
that the filters are set properly for the service you're
paying for. If an analog cable TV package is part of the
"bundle" you're paying for each month, they should make it work for
you, or, explain what additional equipment is needed.

A new splitter should not make the situation worse.

Paul