Interference On Picture? Adpro

[connor2425]

Hope you can help,

Got a camera that has developed some kind of interferance in the last month.

It is connected to a adpro fasttrace, this is also causing it not to record on the affected camera, another 5 cams have a little interference and again these wont record? anyone had this prob?

The picture is ok but its the usual lines across the screen, I tried a fresh coax but still the same problem, Im trying a new PSU tommorrow.

What ive found is the problem cam is 1 and when i plug camera 9 in the picture gets abit better but the lines are still there, when i take it out the pic is alot worse.

Anyone any ideas?

Thanks

[james.wilson]

Ground loop. What is supplying the cameras. Also do you have any other equipment onsite connected to the cameras?

[connor2425]

Ive only had a brief look today, im going to investigate more tommorrow. No seems as tho there is just cameras on the adpro.

Any chance of this being a PSU problem?

[james.wilson]

thereis a chnace yes, but then cant see why plugging a cam in would help it?

[connor2425]

also they have put a test monitor local to the camera and its fine, but when i throw a cable across the building the same prob occurs

[james.wilson]

id say ground loop then, are they supplied form the same 240v power point?

[connor2425]

no there all powered from different points, I think.

[james.wilson]

if so then id say you have a ground loop as above.

You can test by using an isolator or briefly run suspect cameras from 12v batteries.

[connor2425]

Put a new PSU on it locally, was fine so looks like a ground loop problem!

[james.wilson]

excellent.

thanks for the followup