| 摘要 |
PROBLEM TO BE SOLVED: To rationalize the wiring facilities and to reduce the cost of the installation of video devices such as a TV camera installed at various places with many wiring routes. SOLUTION: The output video signals of TV cameras 31-3n are connected to plural points of a cable 1 via the current drive circuits and these camera outputs are alternatively selected by each intermittent control and connected to the cable 1. An electric wiring is added to the cable 1 in parallel and connected to a control signal generation means to generate a control signal to control every current drive circuit.
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