We are specifying a system to use power over coaxial cable, that will transmit SDI video.
Is there any standard (IEEE or otherwise) for implementing it?
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\$\begingroup\$ Mind that users might be tempted to use whatever coax they have that meets the impedance spec - and that the DC handling capability of the various options will vary brutally. Forcing a few amps over RG-179 could fail in interesting ways... \$\endgroup\$– rackandbonemanCommented May 31, 2018 at 0:02
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I'm not aware of any standard for it, but one of my clients has a proprietary system that does power + SDI over coax. For safety, they apply a low voltage to the cable first, and only if the equipment at the other end does a proper handshake, they then apply full power. That way, if an end user has connected an ordinary SDI camera or display, nothing will get blown out.
answered May 30, 2018 at 22:44