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| Transmit Analog Video over long distance |
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| dustingrant:
Hello, I’m currently working on a project where I need to transmit analog video over approx 2000 meters through single conductor wireline. The project is a video camera that will be used to inspect boreholes. The camera is already built and runs on a 12 volt DC system, and consumes approx 0.5 amp current. Just wondering if someone could guide me in the right direction on how to go about doing this? I don’t know a lot about op amps but feel what I need to do for starters is amplify the signal before sending it up the line to surface. I would imagine it would pick up all sorts of noise and will likely have to filter the signal once at surface before running it to the TV. With the experience several people on this forum have, are there any tips anyone could give me? Thanks a lot! |
| MosherIV:
Hi Welcome to the forum. You have 2 options: 1 digitise the signal, transmit the digital stream, convert the digital stream back to analogue at the other end 2 modulate your analogue signal at the camera end, transmit the modulated signal, demodulate at the other end. I do not have drop in solution for you. Research the 2 solutions I have suggested for yourself. Good luck Edit. I forgot to mention that you should research physical transmission hardware as well. Ethernet hardware is not suitable, 2km is beyond the workable distance. Try looking at telephany devices. |
| dzseki:
Get an RF modulator (from an old VHS video), apply the output to an RF power amplifier and there you have your own pirate TV station :D |
| coromonadalix:
we had a similar sytem, 4 video chanels up to 20 miles range, the hiccup it was a microwave dish antenna, you could not be in front of the antenna when it was working loll |
| Marco:
Googled it for ya ... given the very low -3dB bandwidth of your cable (~10 kHz) you'll need a specially adapted modem. It's possible to get high bitrate for video with relatively high complexity modems, but most systems seem to work with relatively low bitrate signals and just accept very low update rates. It would be easier with a real coaxial cable rather rather than that single conductor monstrosity. |
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