steved20

Hi there, I have a computer with 2 hahua HD-SDI video cards, I have 6 HD-SDI cctv cameras to go with it. I was using a usb dvr card with 6 analogue cameras, I disconnected all cameras, connected my new HD-SDI cameras in to the Dahua dvr cards directly on the back of the computer all work great. When I connected the HD-SDI cameras to the existing wiring the cameras are showing as no signal. There is power to the camera, I have checked the existing wiring with a multi meter all is good, could someone tell me what I am doing wrong. I went to Maplins and bought a 10 amp power supply as I thought that would help, I bought a new 20 metre lead to see if that would work and it doesnt. I plugged all the cameras back directly in to the computer and all the cameras work fine with the new power supply. Thanks in advance for any help I am given, Regards Steven in the UK.

I bought a 75ohm 1metre lead from maplins to test the cameras and it worked, I will buy the cable from the store you recommended tomorrow.

Hi there, can you recommend somewhere I can buy the leads in 20 metre lengths with the bnc and power connections already made?

Thanks for all your help, I will go Monday if I can't find anything tomorrow

I'm in enfield north london is there anywhere near me I could buy some tomorrow

My leads look like like them, I thought and have read online that you can use existing cables with HD-SDI cameras. why dont these cables work? I took a camera apart and the wire strands going in to the camera are so thin. I dont want to buy more equipment when I dont need it, would the cameras definatly work with different cable? Before finding this forum I was looking around for different cable and it all seems quite standard like the cable I have, the only HD-SDI cable I could find was video cable.

just normal cctv leads that were used for the existing system with BNC adapters on the ends The connectors are Red for power, white and yellow