I recently bought a video bullet camera manufactured by ISCO that is powered by a coaxial cable (RG 58 type A) that carries both the power through the unit and the video signal simultaneously. It comes with a power supply that allows you to plug the unit into an AC outlet: you plug the coaxial cable (BNC connector) into the power supply, plug the power supply into the wall, and the video out signal comes from a BNC outlet in the same power supply. The video camera itself requires 12V DC, and the power supply takes the AC and converts it to DC for the camera.
My question: can I run this camera directly from a 12V DC battery (car battery)? I have no idea how a coaxial cable like this can carry both power and video signal simultaneously. For example, is there an adapter that I can plug the cable into that separates the power from the video? Then the power portion of the cable I could connect to the battery contacts, and the video portion I could then connect to a monitor.
Any help appreciated!