DVR systems DVRxx04HF-A Series - Manual (Page 43)

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1.5U Series
2U Series
Figure 3-2
3.7 Connecting Audio Input & Output, Bidirectional Audio
3.7.1 Audio Input
These series products audio input port adopt BNC port.
Due to high impedance of audio input, please use active sound pick-up. See
X285H285H285H
Figure 3-3.
Audio transmission is similar to video transmission. Try to avoid interference, dry joint, loose
contact and it shall be away from high tension current.