"Tom Biasi" <tombiasi_at_optonline.net> wrote in message
news:rgiod79en8v5pbj6782csrls1f8k3lo1m1_at_4ax.com...
On Mon, 5 Dec 2011 04:03:58 -0000, "Desireless"
none_at_soundstate.co.uk> wrote:
Hello, please excuse this appalling
explanation of things!
I had a 5-core cable for an exterior camera,
this cable is now useless due to damage - so I
bought a BNC and Power cable (see this link -
links to a picture only:)
http://images.maplin.co.uk/full/n68gr.jpg
Wasn't that one exactly, but has those plugs - I
bought mine from eBay. Anyway, in order
to run the cable where needed I had to cut the plugs
from one end - only to discover that this is only a
3-core cable. As far as I know, power requires positive
and negative, as does the video = 4-cores. What this
cable appears to be doing is:
Power = red (live)
Audio = green (live)
Power and audio = black (neutral)
I don't know if I have the terminology correct
here (live/neutral) but hope it gets my point across.
Is this a safe way to wire a camera? I've actually done it
and the camera works on 3-cores. The power adaptor
is feeding 500mA, part of that is sharing with the
camera-video-neutral.
Hopefully you can decode what I'm saying here!
Delivering power on the video line is typical. The DC can easily be
stripped from the TV signal. Some cameras carry the audio separate and
some as a composite signal.
Some of the more modern units can do all with two wires.
I suspect (???) that your setup is using DC on one wire and
Vidio/Audio on another wire and a common ground (common).
But I can't see your setup.
Tom
Yeah, that's exactly it DC (wire 1), Video (wire 2) and the common. I've
left it running all night and there appears to be no issues, which is pretty
cool.
Good
