... input port.VIDEO IN 1 5BNC: Signal input port, the same as VIDEO IN2.K1: Switching Key, to reset and scan sync ... signal.3. Installation1. Introduction of InterfaceUnderneath panel: input interface of No.1 channel signal, 5 BNC in total ... up the Display.3,Plug in, then the system will identify automatically. If fail to identify, press K1 to reset.5. Technical Parameters Power ...