H.264 Super Digital Video Recorder User Manual10(1) Video input (2) Video output (3) Audio input/ audio output (4) USB interface(5) Network interface (6) RS-485 interface video (7) Power jack (8) VGA output(9) Alarm input/alarm output (10) HDMI interface (11) Loop out outputNote: Some models have front panel USB interface, this interface with the top of the rear panel USB portare mutually exclusive, only one interface is effective at the same time. USB at the bottom of rear panel isindependent and effective.2.5 Installation connections sketch map (16CH DVR as an example the following, pleaseprevail in kind).Picture 2.1 Installation connections sketch map2.6 Audio and video input and output connections2.6.1 Video input connectionsA. Analogue video signal: The video input port is BNC connector plug. The demand of input signal isPAL/NTSC BNC (1.0VP-P, 75Ω).