IC Realtime Specialty: 4-CH Mobile DVR - Manual (Page 27)

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Figure 3-4
The audio input cable is shown as in Figure 3-5. Please use this cable when your camera is the
general BNC port.
Figure 3-5
Please refer to the following sheet for detail 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）
3.6.2 Audio Output
The audio output signal parameter is usually over 200mv 1KΩ (BNC). It can directly connect to
low impedance earphone, active sound box or amplifier-drive audio output device.
If the sound box and the pick-up cannot be separated spatially, it is easy to arouse squeaking. In
this case you can adopt the following measures:
z
Use better sound pick-up with better directing property.
z Reduce the volume of the sound box.
z Using more sound-absorbing materials in decoration can reduce voice echo and improve
acoustics environment.
z Adjust the layout to reduce happening of the squeaking.
Please refer to
X286H286H286H
Figure 3-6. It is for audio and video output.