XtendLan DVR-410AUTO User
‘s Guide
26
3.6 Connecting Audio Input & Output, Bidirectional Audio
3.6.1 Audio Input
These series products adopt BNC port.
Due to high impedance of audio input, please use active sound pick-up. See Figure 3-6. Audio
transmission is similar to video transmission. Try to avoid interference, dry joint, loose contact and it
shall be away from high tension current.
The 4-pin aviation-level port is shown as below. It is to input the audio and video.
Figure 3-6
The audio input cable is shown as in Figure 3-7. Please use this cable when your camera is the general
BNC port.
Figure 3-7
Please refer to the following sheet for detailed information.
Audio/Video input cable (Aviation port 4p male port)
Port
Color and Definition
1
Yellow BNC male port (Video input)
2
White BNC male port (Audio input)
3
DC power male socket external is negative and internal is positive
(Camera power output)
4
DC power male socket external is negative and internal is positive
(Camera power output)
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