Modulator problem ?

[tones1966]

I have 2 cctv cameras which I have set up. The coax from each goes to my loft and then into 2 modulators. Both are set up for quite high channels ( but not the same!!) and then they go into the tv booster/ splitter which feeds 2 tv's.
Everything is fine for a few hours and then I lose both cctv images on both tv's. Not at the same time, but within an hour or so of each other.
The cameras are fine as I still have a pic on a monitor. If I power down the modulators for 5 mins or so, the pictures come back when powering up. But the same happens again within a few hours. Somewhere between the modulator and both TV's there is obviously a problem !
Its strange that both modulators could be faulty.
Can anyone offer some suggestions please ?

Many thanks.

[Reiner]

Originally Posted by tones1966

I have 2 cctv cameras which I have set up. The coax from each goes to my loft and then into 2 modulators. Both are set up for quite high channels ( but not the same!!) and then they go into the tv booster/ splitter which feeds 2 tv's.
Everything is fine for a few hours and then I lose both cctv images on both tv's. Not at the same time, but within an hour or so of each other.
The cameras are fine as I still have a pic on a monitor. If I power down the modulators for 5 mins or so, the pictures come back when powering up. But the same happens again within a few hours. Somewhere between the modulator and both TV's there is obviously a problem !
Its strange that both modulators could be faulty.
Can anyone offer some suggestions please ?

Many thanks.

Is it possible that the modulators over-heat?

What's the 'tv booster/splitter' you mention? How do you connect the two modulator's to it?