Hello,
Apologies if this is in the wrong forum. I'm trying to design a data link for transmitting 1080p compressed video at a bit rate of 18Mbps through a 100m long micro coaxial cable (36 AWG, such as the Pico Coax line made by Axon). The attenuation of such a cable at 10MHz is 32dB, and at 20MHz is 40dB. Because of the small cable diameter, frequencies higher than 20MHz are severely attenuated, so I don't think I can use that part of the spectrum without a lot of equalization/de-equalization. Ideally, this would be a half duplex link with 18Mbps coming from the camera and a small amount of control data (less than 2Mbps) going to the camera. I'm thinking that 40dB is a feasible amount of attenuation to work with, and that I could set up a single channel operating at 20MHz to get the 20Mbps data rate - no need for fancy frequency division multiplexing etc.
On the camera side, I envision that the logic level video data needs to feed into an amplifier/line driver which drives the coax, and on the other end of the coax I need a receiver IC/circuit of some kind to allow me to get the data back to logic level so I can feed it into a microcontroller or some other IC. Can anyone offer some advice on what types of amplifiers/line drivers, receivers, and protocols I should be looking into using? I'm aware of VDSL, which seems like it's using the right part of the spectrum for my cable, but I think that only pertains to differential signals, which won't work on my 2-conductor coax. And the FPD-Link SerDes series from TI seem to use parts of the spectrum well beyond 20MHz to achieve their huge Gbps data rates, which I don't need and which probably won't work on my long length micro coax.
Thanks in advance for your replies.
