CCTV Problem

[barera]

Just fitted my first cctv at home...not very happy with the result...I got a good picture but have a "Ghost" picture moving across the screen constantly on both cameras. What am I doing wrong??

 

[breezer]

i guess a monitor set up problem. can you not try another monitor / TV (most now have a video in, input, (yellow socket) you should be able to use this to test.

 

[barera]

i guess a monitor set up problem. can you not try another monitor / TV (most now have a video in, input, (yellow socket) you should be able to use this to test.

I have two monitors connected using the AV input and i get the same problem on each monitor!

 

[youtekkinthepish]

Check PSU and especially earths and 0v

 

[plugwash]

What kind of cable are you using?
What is the wiring layout?
Are theese proffesional CCTV monitors and if so do they have switches labeled HI-Z and 75 ohm or something similar?

 

[barera]

What kind of cable are you using?
What is the wiring layout?
Are theese proffesional CCTV monitors and if so do they have switches labeled HI-Z and 75 ohm or something similar?

I used Cat5 4 twisted pairs. Using 3 pairs for power and one pair for video. that pair then connects to a short length of rg59 coax terminated on a crimp-on BNC connector.

The Monitors are LCD TV's with an AV input.

 

[breezer]

what happens if you use a short bit of rg 59 with a crimp on BNC at one end and phono at the other (to go into the TV)

as in, bring the camera in side and plug it in with the new short lead

 

[barera]

what happens if you use a short bit of rg 59 with a crimp on BNC at one end and phono at the other (to go into the TV)

as in, bring the camera in side and plug it in with the new short lead

I haven't tried this yet... I will try this over the weekend and report back.

 

[barera]

I should also mention that I have another camera, a PTZ Dome camera that I fitted to the front of the house using two cables, one cat5 for power and data, and one RG59 Coax for the video signal and that gives me a crystal clear picture.

I also want to thank everyone for taking the time to reply.

 

[bernardgreen]

If the ghost picture is the image from the other camera then the cause may be the signal strength ( voltage ) from camera is too high and is breaking through the video switch. Fitting attentuators in the leads from cameras to mixer may solve this.

 

[disinfo]

I should also mention that I have another camera, a PTZ Dome camera that I fitted to the front of the house using two cables, one cat5 for power and data, and one RG59 Coax for the video signal and that gives me a crystal clear picture.

I also want to thank everyone for taking the time to reply.

You dont mention that you are using any baluns such as these,

http://cgi.ebay.co.uk/CAT-5-BALUN-F...14&_trkparms=72:1690|66:2|65:12|39:1|240:1318

 

[kensplace]

Unless your cable is really short you will need a balun at each end of the cat5 cable.

 

[barera]

Unless your cable is really short you will need a balun at each end of the cat5 cable.

What is the maximum distance possible without using these baluns?

 

[youtekkinthepish]

Unless your cable is really short you will need a balun at each end of the cat5 cable.

What is the maximum distance possible without using these baluns?

Difficult to say.
They should be used. Yes, you can get away without them but it depends on a number of factors,not just cable length.

 

[Click-Sure]

Sheilded Cat 5 is never a bad idea either!