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The input video signal should have high SNR, low distortion; low interference, natural color and suitable
brightness.
To guarantee the stability and reliability of the camera signal, the camera should be installed in a cool, dry place
away from direct sunlight, flammable materials, explosive substances, 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, well shielded BNC cable. Please select suitable BNC model according to the transmission
distance.
If the distance is too long, you should use twisted pair cable. 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 power lines.
Keep connection lugs closely contacted.
The signal line and shielded wire should be fixed firmly and in well connection. Avoid dry joint, lap welding, and
oxidation.
3.3.2.2 Video Output Connection Information
Video output includes a BNC (PAL/NTSC1.0VP-P，75Ω）output, a VGA output, and a HDMI output. The system
supports BNC, VGA and HDMI output at the same time.
When you are using pc 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 your device in proper working condition. Keep it away
from strong electromagnetic interference devices.
Using a TV as video output device is not a reliable substitution method. When using a TV as a video output device,
it is advised to turn off the TV from time to time to ensure its longevity. The use of a low-quality TV may result in
the damage of the device.
3.3.3 Audio Input/Output Connections
3.3.3.1 Audio Input Connection Information
The DVR audio input ports uses a BNC type connection.
Due to high impedance of audio input, please use an active sound microphone to get the best audio quality.
Audio transmission is similar to video transmission. Try to avoid interference, look out for dry joints, loose
contacts, and keep the audio devices and cables away from power lines.
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