| 摘要 |
The present invention provides a single-cable transmission device for signals and a power supply of a surveillance system, which only requires a single cable to transmit various signals and a power supply; which transmits signals in a carrier manner, allowing longer-distance transmission; which transmits signals in a frequency division manner, allowing bi-directional transmission, A power-supply-voltage/output-load status display is further provided, thereby facilitating a user to directly find the cause of a failure so as to eliminate the failure promptly.
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