Re: Bad port on DVR weird trouble shoot

["Just Looking" <Spam@xxxxxxxxxx>]

If there is a separate power supply for each camera I have seen that type
problem before.
If you get rid of the ground on the A/C plug to the DVR or to the camera (or
camera power supply) that can help. There is also a thing called a ground
isolation transformer to take care of the problem. However if you're into
the Nuvico priced stuff that would be out of the question to solve it with
that.
http://stna.resource.bosch.com/documents/TC8235GIT_DataSheet_enUS_T3069567627.pdf

"nick markowitz" <nmarkowitz@xxxxxxxxx> wrote in message
news:2861ad23-f764-4ccd-922a-db62589af2b9@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> CCTV system i put in couple years back has been working fine and
> customer called to say cameras pictures rolling all over them selves.
> Get there and  looks like AC feeding into video find camera 3 causing
> problem so I isolate it and start testing and camera is not bad but
> here the port on DVR is bad.  First time I have seen this usually the
> port  just goes dead on a DVR not doing the rollover thing. its a
> EV4000 Nuvico and first time I have ever had a problem with any of
> there stuff  in over 5 years  of installing there cameras and DVR any
> one else run into it?