CCTV Vertical Coloured Lines Rolling Across Screen Interference

[CapLeaker]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

I am afraid if it could actually be a ground loop. The ground loop isolators cost up to 15 bucks for just a 2 pack and with 16 cameras this could be very expensive. I wish I could get a sample isolator so I could test this out first before I go off buying 16 isolators.

Umm... sorry... if one can afford 16 cameras, he can afford 16 Loop isolators for 8 bucks a piece too.

[R_J]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

I have multiple BNC cables running side to side next to each other at some locations. Will that cause problems? I really hope that isn't the problem because the areas where they are together are the only areas they can run. Also, the lines roll sideways (left to right or right to left) not upward.

BNC are the connectors, what type of cable? If it is coax, shielded cable its not an issue. If it's twited pairs of wire then I could see a problem.
A ground loop is a small difference in the 60hz a/c ground between two points, and due to the vertical scan rate being around 59hz, the bar will show as moving upward in the image.

[TornadoAlley101]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

It could be a ground loop.
I did 6 months working in a CCTV place, I had to replace a similar power supply as a recent installation had similar interference on the screen. It was no better after replacement.
I believe it was replaced with an IP camera system after that.

I am afraid if it could actually be a ground loop. The ground loop isolators cost up to 15 bucks for just a 2 pack and with 16 cameras this could be very expensive. I wish I could get a sample isolator so I could test this out first before I go off buying 16 isolators.

[TornadoAlley101]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

If you are combining the ANALOG camera video signal over twisted pair, you will likely have that issue. one cameras video will beat against the others causing a harmonic which shows up in the video. The best way is to run seperate coax to each camera.
If it was a ground loop problem it would usually have a bar that rolles upward in the video signal.

I have multiple BNC cables running side to side next to each other at some locations. Will that cause problems? I really hope that isn't the problem because the areas where they are together are the only areas they can run. Also, the lines roll sideways (left to right or right to left) not upward.

[TornadoAlley101]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

If I read the tech sheet for the SS1200 correctly then it is rated at just over 5 amps. If you have more items connected to it that take in total more than 5 amps then that may well be the problem.

I disconnected the UPS system from the voltage stabilizer and nothing has changed. The UPS is directly connected to the wall outlet but there is no change in the lines. The description says the voltage stabilizer's maximum capacity is 1200VA @ 600 Watts.

[dick_barton]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

Ugh, I purchased the 10A Power Supply and the lines still persist. Help!!!
I feel like my outlet is underpowered or something. I was going to try testing it with my voltmeter but it is broken. I feel like I am going to end up dropping a lot of money on this if the problem keeps up. I really need some professional help on what to do.

If I read the tech sheet for the SS1200 correctly then it is rated at just over 5 amps. If you have more items connected to it that take in total more than 5 amps then that may well be the problem.

[R_J]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

If you are combining the ANALOG camera video signal over twisted pair, you will likely have that issue. one cameras video will beat against the others causing a harmonic which shows up in the video. The best way is to run seperate coax to each camera.
If it was a ground loop problem it would usually have a bar that rolles upward in the video signal.

[diif]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

It could be a ground loop.
I did 6 months working in a CCTV place, I had to replace a similar power supply as a recent installation had similar interference on the screen. It was no better after replacement.
I believe it was replaced with an IP camera system after that.

[TornadoAlley101]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

Ugh, I purchased the 10A Power Supply and the lines still persist. Help!!!
I feel like my outlet is underpowered or something. I was going to try testing it with my voltmeter but it is broken. I feel like I am going to end up dropping a lot of money on this if the problem keeps up. I really need some professional help on what to do.

[dick_barton]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

The SS1200 looks as though it's a 600W unit so at 110V the max load current would be 5.45Amps.

[dick_barton]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

Also, will purchasing a 10a power supply benefit my cameras by providing more amps than required? Is it possible I could also buy a 20a 12v power supply instead? For some reason they are cheaper than the 10a power supplies but if the 20a will mess up my cameras then I can go with the 10a instead.

The 20Amp would be fine especially if cheaper than the 10A version.

[TornadoAlley101]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

Here are the links for the power supplies I am referring to:
20A: https://www.amazon.com/Channel-Distr...dp/B01MZ880XT/
10A: https://www.amazon.com/Channel-Distr...dp/B07QXXY987/
It seems the cheaper 10A Power Supplies are less quality so that is why I am aiming for the 20A.

--PS: Sorry if it seems I am spamming the forum. I am honestly just waiting for a reply. Thanks for your understanding.--

[TornadoAlley101]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

Also, will purchasing a 10a power supply benefit my cameras by providing more amps than required? Is it possible I could also buy a 20a 12v power supply instead? For some reason they are cheaper than the 10a power supplies but if the 20a will mess up my cameras then I can go with the 10a instead.

[TornadoAlley101]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

I just tried it out and my 12v 0.5amp power supply worked but I have a few questions after I dug deeper into the problem. I decided to unplug all 3 power adapters except 1 and when I unplugged the 3rd one, the lines became less visible on the 4th power supply's cameras but still faintly visible that it was still an issue. I have a lot of devices connected to one outlet including a wifi router, wifi extender, UPS system, power stabilizer, and other devices. Is it somewhat possible that all of these devices are leaving less than enough power for all of my 4 power adapters and causing the issue? I have made a diagram of the setup I have below. Also, will purchasing a 12v 10A Power supply minimize the amount of power that my previous 4 12v Power Supply's took up? Thank you!

Diagram link:
https://docs.google.com/drawings/d/1...it?usp=sharing

Tip: When you click on an image in the diagram, the product link will appear if you need more information such as voltage.

[TornadoAlley101]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

Thank you, I will try this out. I will let you know the results!

[dick_barton]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

16 camera's at 300mA = 4.8Amp supply total so a 10Amp supply would have no issues.
Perhaps you could try a 12V car battery and see if you still have the colour bars before you buy your power supply.

[TornadoAlley101]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

Update: The camera take in according to the company is 300mAh/0.3A and 12V. Is the 10A Power Supply still suitable? Will the extra 300mAh affect performance?

--New Power Consumption Chart--
Power Supply mAh per camera (10A Total)= about 600mAh
Required mAh per camera = about 300mAh
Left Over mAh per camera = 300mAh

[dick_barton]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

If your sure the camera's take 500mA then the 10A power supply I would have thought would be OK but would not leave you with much room to further expand the number of camera's.

[TornadoAlley101]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

So I basically need the 10 amp 16 channel power supply?
10 amp/16 channel= about 600mAh
20 amp/16 channel= about 1,250 mAh
Required mAh per camera = about 500mAh

[diif]

Re: CCTV Vertical Coloured Lines Rolling Across Screen Interference

how much current does a single camera use?

The analogue cameras are 500mA.