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Re: Voltage from a CCTV camera
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Hi Tim,
Is there a problem that made you measure your cameras?
I suspect that they are all close in voltage, but the waveform esp from a
camera that's looking at something bright is confusing your multimeter?
Cheers
Richard
On 23 November 2017 at 20:59, Tim Hawes timsyahoo@xxxxxxx [ukha_d] <
ukha_d@xxxxxxx> wrote:
>
>
>
> I'm wondering what voltage I should expect on the video signal from a
> conventional (i.e. not IP) cctv camera. The cameras all have a 12v
supply
> and the voltages across the pin and ground at the DVR BNC end range
aroun=
d
> 1.18, 1.5, 1.7, 1.2 and 2.12v.
> I thought video was +/-1v either side of 0v.
> I find it a little odd that all are between 1v and 2v, except one, at
> 2.12v.
>
> Is 2.12v likely to be an issue?
>
> Thanks,
> Tim.
>
>
>=20
>
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<div
dir=3D"ltr"><div><div><div><div>Hi
Tim,<br><br></div>Is there a proble=
m that made you measure your cameras?<br><br></div>I
suspect that they are =
all close in voltage, but the waveform esp from a camera that's
looking=
at something bright is confusing your
multimeter?<br><br></div>Cheers<br><=
br></div>Richard<br><div><div><br><div><div><div><div><div
class=3D"gmail_e=
xtra"><br><div class=3D"gmail_quote">On 23
November 2017 at 20:59, Tim Hawe=
s <a href=3D"mailto:timsyahoo@xxxxxxx";>timsyahoo@xxxxxxx</a>
=
[ukha_d] <span dir=3D"ltr"><<a href=3D"mailto:ukha_d@xxxxxxx"; ta=
rget=3D"_blank">ukha_d@xxxxxxx</a>></span>
wrote:<br><blockquote=
class=3D"gmail_quote" style=3D"margin:0 0 0
.8ex;border-left:1px #ccc soli=
d;padding-left:1ex">
=20=20=20=20=20=20=20=20
<div>
<br><br>
<div dir=3D"ltr"><br><div>I'm wondering
what voltage I should expect on=
the video signal from a conventional (i.e. not IP) cctv camera. The camera=
s all have a 12v supply and the voltages across the pin and ground at the
D=
VR BNC end range around 1.18, 1.5, 1.7, 1.2 and
2.12v.</div><div>I thought =
video was +/-1v either side of 0v.</div><div>I find it a little
odd that al=
l are between 1v and 2v, except one, at
2.12v.=C2=A0</div><div><br></div><d=
iv>Is 2.12v likely to be an
issue?</div><div><br></div><div>Thanks,<br>Tim.=
</div></div>
<br>
<br>
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style=3D"color:white;clear:both"></div>
</blockquote></div><br></div></div></div></div></div></div></div></div>
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Posted by: Richard Challis <richard@xxxxxxx> =
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