IC Realtime Specialty: Interrogator DVR - a DVR for law enforcement - Manual (Page 21)

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NOTE:
You need to use a BNC installation tool to connect coaxial cables to the rear panel.
Figure 3-1
3.6.2 Connecting Video Output
This section provides information about physically connecting video display devices to
the DVR. See Figure 3-2.
There are BNC(PAL/NTSC BNC（1.0VP-P ，75Ω) output and VGA output.
If you connect the DVR with a TV monitor or VGA monitor, the DVR can automatically
detects the monitor type. And without any output device, by default, the DVR is
configured to use a TV monitor. In this case, if your application requires a VGA monitor,
you have to press the button “FN” or Shift on the front panel.
NOTE:
Video output 1 and VGA can’t display at the same time. But Video output 2 can display
properly with Video Output 1 or VGA.
Figure 3-2
3.7 Connecting Audio Input & Output, Bidirectional Audio, Looping Video
3.7.1 Audio Input/One Audio Output