Dahua Technology XVR Series, Руководство пользователя

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User’s Manual
50
Connecting to Video and Audio Input and Output
4.2.1 Video Input
The video input interface is BNC. The input video format includes: PAL/NTSC BNC (1.0 V
P-P
, 75 Ω).
The video signal should comply with your national standards.
The input video signal shall have high SNR, low distortion; low interference, natural color, and suitable
lightness.
Guaranteeing the stability and reliability of the camera signal
The camera shall be installed in a cool, dry place away from the conditions such as direct sunlight,
inflammable, and explosive substances.
The camera and the DVR should have the same grounding to ensure the normal operation of the
camera.
Guaranteeing stability and reliability of the transmission line
Use high quality, sound shielded BNC. Select suitable BNC model according to the transmission
distance.
If the distance is too long, you should use twisted pair cable, and you can add video compensation
devices or use optical fiber to ensure video quality.
You should keep the video signal away from the strong electromagnetic interference, especially the
high tension current.
Keeping connection lugs in well contact
The signal line and shielded wire should be fixed firmly and in well connection. Avoid dry joint, lap
welding, and oxidation.
4.2.2 Video Output
Video output includes a BNC (PAL/NTSC1.0 V
P-P
, 75 Ω) output, a VGA output, and HDMI output. System
supports BNC, VGA and HDMI output at the same time.
When you are using pc-type monitor to replace the monitor, pay attention to the following points:

To defer aging, do not allow the pc monitor to run for a long time.

Regular demagnetization will keep device maintain proper status.

Keep it away from strong electromagnetic interference devices.
Using TV as video output device is not a reliable substitution method. You also need to reduce the
working hour and control the interference from power supply and other devices. The low quality TV
may result in device damage.
4.2.3 Audio Input
This series of products audio input port adopt BNC port.