Hi All,

So can anyone help me :-(

I have a simple setup (I thought) 4 core cable running to camera (red,
black, White and yellow) with a braided coper sheath.

I terminated both ends as such.......

Power
red to positive
black to negative (gnd)

Video
Yellow to centre pin
braid to gnd

I did that both ends. I have narrowed the problem down to the video side of
the cable but what on earth can I be doing wrong? its straight through, have
checked and there are no breaks :-(

ALSO

I have a few camera's with RJ11 connectors. I want to snip them and put on a
phono plug and a power plug....

Again I have 4 core cable (no braid this time.....) Red, Black, Blue and
yellow

Anyone any ideas what I should do here?

Thanks

Paul

Pedro Popadopolous wrote:

So can anyone help me :-(

I have a simple setup (I thought) 4 core cable running to camera (red,
black, White and yellow) with a braided coper sheath.

I terminated both ends as such.......

Power
red to positive
black to negative (gnd)

Video
Yellow to centre pin
braid to gnd

I did that both ends. I have narrowed the problem down to the video side of
the cable but what on earth can I be doing wrong? its straight through, have
checked and there are no breaks :-(

Erm - WHAT problem?!

David

"Pedro Popadopolous" wrote in message
...
Hi All,

So can anyone help me :-(

It does help if you tell us the problem!

I assume you are not getting a video signal from your camera.
If you connect the camera to the monitor directly, do you get a picture?

Is the 4 core cable alarm cable?
If so, how long is the run?

From my experience when installing cameras at my house (9 of them so far!)
unless you use proper co-ax for the video feed, the quality of the picture
is **** poor.

I used RG59 cable for all my cameras - the cameras in and outside the
garages, at the top of the garden, some 70m of cable away, all have
excellent images.

If your runs are short, then the "4 core" may be acceptable (but coax would
be better!)

Have you checked that the camera is powered up OK and that the yellow cable
is ok (Swap the red and yellow both ends, then make sure the camera is sill
powered up - if it is, then the yellow is fine, if not, then your yellow
wire is broken somewhere!

If the cables are all OK, and the camera defiantly works, is there a way you
can connect the monitor up to the camera with a short lead (but leaving the
camera powered via the long one)? - Sometimes you get too much voltage drop
over a long cable, then the camera fails to work.

Give us some more info on your setup, including power supply voltage and
amperage, model of camera, length of cable run, type of monitor,
multiplexer, switcher etc...

Sparks...

Hi

Sorry your right I get no image.....

So I have ruled power out by taking power right to the camera and not across
the length and it still doesn't work. The length is about 20 feet, the cable
I use is the same cable I ran a smaller camera off (same length) just before
swapping to this, I did do some rerouting though so the cable was taken
down, relaid and terminated.

I have shorted one end of the video side and went to the other and got a
shorted reading on my Multimeter so I am convinced the cable is fine.....

Is there any issue in the way I have wired it? I used the outer braid as the
gnd for the video signal and the black core for the gnd for the power. Its
9v regulated supply. I have no idea of ampage sorry.

The video and power do not share a commom ground because of above....

I am connecting the camera to an IP Server box (Small black box with 4 video
inputs that sits on your lan. I took another camera and connected it into
the port of the IP Server and the port worked.

Its a head scratcher all right

Thanks

Paul
"Sparks" wrote in message
.. .

"Pedro Popadopolous" wrote in
message ...
Hi All,

So can anyone help me :-(

It does help if you tell us the problem!

I assume you are not getting a video signal from your camera.
If you connect the camera to the monitor directly, do you get a picture?

Is the 4 core cable alarm cable?
If so, how long is the run?

From my experience when installing cameras at my house (9 of them so far!)
unless you use proper co-ax for the video feed, the quality of the picture
is **** poor.

I used RG59 cable for all my cameras - the cameras in and outside the
garages, at the top of the garden, some 70m of cable away, all have
excellent images.

If your runs are short, then the "4 core" may be acceptable (but coax
would be better!)

Have you checked that the camera is powered up OK and that the yellow
cable is ok (Swap the red and yellow both ends, then make sure the camera
is sill powered up - if it is, then the yellow is fine, if not, then your
yellow wire is broken somewhere!

If the cables are all OK, and the camera defiantly works, is there a way
you can connect the monitor up to the camera with a short lead (but
leaving the camera powered via the long one)? - Sometimes you get too much
voltage drop over a long cable, then the camera fails to work.

Give us some more info on your setup, including power supply voltage and
amperage, model of camera, length of cable run, type of monitor,
multiplexer, switcher etc...

Sparks...

"Pedro Popadopolous" wrote in message
news:d53ni0
I am connecting the camera to an IP Server box (Small black box with 4
video inputs that sits on your lan. I took another camera and connected it
into the port of the IP Server and the port worked.

Its a head scratcher all right

Are you using the old power supply from the old camera, or did the new one
have a different one (the new camera sounds as if it has a BNC connector
from you description, this normally means it is a professional type camera
not a domestic one - (The professional ones usually require 12v DC or 24V
AC)

Your wiring sounds fine to me, my cameras are powered with alarm type cable
from multiple PSU's, with the video signals on separate cables back to the
multiplexer, so the power ground (0v) and the video ground are separate on
my install too.

Can you connect the video to a monitor or TV's AV socket to see if that
works?

Sparks...

I did that both ends. I have narrowed the problem down to the video side
of the cable but what on earth can I be doing wrong? its straight through,
have checked and there are no breaks :-(

Anyone any ideas what I should do here?

Thanks

Paul

You need proper COAXIAL cable for the video, usually 75 ohm impendance,
you cant use single core cable.

Dave

--
For what we are about to balls up may common sense prevent us doing it
again
in the future!!

"Sparks" wrote in message
.. .

"Pedro Popadopolous" wrote in
message news:d53ni0
I am connecting the camera to an IP Server box (Small black box with 4
video inputs that sits on your lan. I took another camera and connected
it into the port of the IP Server and the port worked.

Its a head scratcher all right

Are you using the old power supply from the old camera, or did the new one
have a different one (the new camera sounds as if it has a BNC connector
from you description, this normally means it is a professional type camera
not a domestic one - (The professional ones usually require 12v DC or 24V
AC)

Your wiring sounds fine to me, my cameras are powered with alarm type
cable from multiple PSU's, with the video signals on separate cables back
to the multiplexer, so the power ground (0v) and the video ground are
separate on my install too.

Can you connect the video to a monitor or TV's AV socket to see if that
works?

Sparks...

Hi,

I can connect the camera via shorter cable into a monitor and it works fine
with supplied PSU :-(

I really have managed to whittle it down to the video cable and there are no
shorts (Except when I introduce one to test)

:-(

Can you connect the video to a monitor or TV's AV socket to see if that
works?

Sparks...

Hi,

I can connect the camera via shorter cable into a monitor and it works
fine with supplied PSU :-(

I really have managed to whittle it down to the video cable and there are
no shorts (Except when I introduce one to test)

Have you tried the same test with the longer cable, using a monitor?
(The monitor may be less fussy of the signal strength than the IP Server)

Sparks...

"Sparks" wrote in message
.. .
Can you connect the video to a monitor or TV's AV socket to see if that
works?

Sparks...

Hi,

I can connect the camera via shorter cable into a monitor and it works
fine with supplied PSU :-(

I really have managed to whittle it down to the video cable and there are
no shorts (Except when I introduce one to test)

Have you tried the same test with the longer cable, using a monitor?
(The monitor may be less fussy of the signal strength than the IP Server)

Not since I relaid it :-(

It worked before and my tests show no breakage in cables :-( Ho Hum

Have you tried the same test with the longer cable, using a monitor?
(The monitor may be less fussy of the signal strength than the IP Server)

Not since I relaid it :-(

It worked before and my tests show no breakage in cables :-( Ho Hum

Is it not possible to connect a monitor up to the cable now it is installed?

You really should put in some spoper co-ax cable!
A friend of mine got some cameras that had the same kind of wire you
discribe, the image was quite blurred (even after playing wht the focus!)
I said he really should install Co-Ax to the camera, and as he worked for
NTL anyway, he had some "spare" laying about anyway!
Somehow I ended up doing most of it, but tha't another story!
After the new cable was installed, the picture was *vastly* improved, he
thought the camera was just crap.

If you have some spare coax laying about, try connecting a 20ft length to
the camera, and the other end to the IP Server to see if that solves the
problem (My money is on it will!)

You want to use RG59, RG6 or CT100 cable, not "low-loss" areial cable - I
have used RG59 throughout with proper crimped BNC connectors.

Sparks...