Wired CCTV camera to tv errors

[Jeremy160]

I recently purchased a simple wired cctv surveillance camera. Installing it was no problem. I needed 30 meters of wire from my front door to my tv set. In between i had to add some wire so i therefore soldered some lengths. The camera works well. Even the sound.
BUT i am constantly getting these two fuzzy lines on the screen which keep on going up and down the screen. They are very annoying. Is it maybe due to the fact that the wire is 30 meters long? The camera does actually work well because when i directly connected it to my tv it was 100% clear!. Or maybe is it the type of wire i used for it? (i used phone wire as it has 4 wires. I used 2 for video and 2 for audio).


I am really frustrated. Can anyone try and help please?

[iStorm]

Yes you have used a twisted pair, but im not suretelephone cable ill be good enough, the problem you are getting with lines is an earth loop, its difficult to know what to recommend, but you will need to earth the video

[Jeremy160]

im not really getting what your saying. Can you please guide me? how can i earth it?

[Neo]

Would be best: use coaxial cable for Video (e.g. RG59) for audio also, recommendation, use shielded cable: all problems with interference will disappear.

[Jeremy160]

so will i have to use 2 cables? isnt there a cable where i can put the sound and video in one cable only? p.s there is no problem with the sound. its just 2 lines going up and down the screen. Is it maybe because the wire is too long? (30 meters)

[Neo]

At worst you can use just shielded cable, e.g. Order Code: XS94C from Maplin. Just need to watch: usually thicker cable is better and have better shielding.
This is mine opinion: some at all time using CAT5 cable with passive adapters; but picture quality not meeting my requirements.

[thecctvguru]

I'd suggest Cat5 cable, which is a 4 pair cable, with a passive balun at either end of the video pair (these are devices that change the impedance of the cable, if you dont use these the video can suffer from double images). Then you can use another pair for audio, and the final 2 pairs for power +-.

Video will transmit hundreds of metres up cat5 without loss using this method. Although you'd suffer from power loss on the cable before then (but 30 metres would be more than fine).

[securityman]

I understand what he is saying,

Could i ask what kind of TV your useing as this will affect it big time.

Cable is eathir they not enough copper in it or somewhere along line cables anit working.

and Guys you can join 50 pieces cable up and it should not make an difference only difference will be less quality, as I use 5meter cable and then 80meter cable for an event up Scotland for CCTV and I used in pass five or six different sort cables and found no problems. Also depends how it been stored.

[Neo]

Each thing is made to do something specific. CAT5 primary made not to use for CCTV. Each cable has technical specification and CAT5 lose to coaxial cable.
Regarding power through CAT5. For these days is popular “all in one cameras” with IR Led; in darkness camera can take 1A (most cameras of this type use 12V DC). For CAT5 used AWG24 wire, so on 50m you can lose >2.5V!