Re: Bad port on DVR weird trouble shoot

[nick markowitz <nmarkowitz@xxxxxxxxx>]

On Sep 17, 10:00=A0pm, "Just Looking" <S...@xxxxxxxxxx> wrote:
> 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 wit=
h
> that.http://stna.resource.bosch.com/documents/TC8235GIT_DataSheet_enUS_T3=
0...
>
> "nick markowitz" <nmarkow...@xxxxxxxxx> wrote in message
>
> news:2861ad23-f764-4ccd-922a-db62589af2b9@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
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> > 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 =A0looks 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. =A0First time I have seen this usually the
> > port =A0just 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 =A0in over 5 years =A0of installing there cameras and DVR a=
ny
> > one else run into it?

He only has 3 cameras so I moved the camera to the unused port to
solve the problem. for now like I told him by time he is ready to add
a camera it will be time to get a new DVR the way prices are coming
down in cost.
I had surge protection and UPS  on DVR  and had a ditek surge
protector on  the inputs to ports plus common power supply etc to
prevent problems as there on top of a hill
But they had a lightning strike nearby that effected neighbors so was
that cause? who knows. strange it would only bother one port.


I had a problem at a mini storage facility where couple cameras where
always going out but solved it with isolation transformers after we
realized the power source for the cameras was coming from a separate
derived  power source
after we traced and found it was coming from a separate power line to
property. Owner did not realize utility was feeding his property  that
way. as he only got on unified bill.