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Digital Network Video Surveillance System
Connecting Video Input and Output Devices
Connecting Video Input
The video input interface is BNC. The input video format includes: PAL/NTSC BNC（1.0V
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.
Guarantee the stability and reliability of the camera signal:
The camera shall be installed in a cool, dry place away from direct sunlight, inflammable, explosive
substances and etc.
The camera and the DVR should have the same grounding to ensure the normal operation of the camera.
Guarantee stability and reliability of the transmission line
Please use high quality, sound shielded BNC. Please 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.
Keep 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.
Connecting Video Output
Video output includes a
BNC(PAL/NTSC BNC（1.0VP- P， 75Ω）output and a VGA output.
T
System supports BNC and VGA output at the same time. See
When you are using pc-type monitor to replace the monitor, please 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.
Connecting Audio Input & Output, Bidirectional Audio
Audio Input
These series products adopt BNC port.
Due to high impedance of audio input, please use active sound pick-up. See Figure 3-8.
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.
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Unisight Digital Technologies, Inc.
75Ω.
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