NightWatcher D1 Digital Video Recorder User Manual
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2.6 Audio and video input and output connections
2.6.1 Video input connections
The video input port is a BNC connector plug. The input signal is PAL/NTSC BNC(1.0V
P-P
,
75Ω).
The video signal must be in accordance with the specified standard which has the high signal to noise ratio,
low aberration and low interference. The image must be clear and have natural color with appropriate brightness.
Ensure the camera signal is stable and credible
The camera should be installed in an appropriate location, away from backlighting and low illumination or
apply better backlighting and low illumination compensation.
The ground and power supply of the camera and the DVR should be shared and stable.
Ensure the transmission line is stable and credible
The video transmission line should adopt high quality coaxial pair which is defined by the transmission
distance. If the transmission distance is too far, use a shielded twisted pair, video compensation equipment or
transmitted by fiber to ensure signal quality.
The video signal line should be away from any electro magnetic interference and other equipment signal lines.
The high voltage current should be especially avoided.
Ensure the connection stable and credible
The signal and shield lines should be firmly connected and eliminate any poor joint welding and oxidation.
2.6.2 Video output connections and options
The video output is divided into PAL/NTSC BNC(1.0V
P-P
,
75Ω) and VGA output(selective configuration).
When replacing the monitor with computer display, there are some practical considerations;
1
、
Do not leave in “turned-on” state for extended periods.
2
、
Keep the computer display working normally by demagnetizing regularly.
3
、
Avoid any electro magnetic interference.
TV is not an ideal replacement for video output. It is recommended to minimise usage time and control the
power supply and any interference introduced by nearby electronic equipment. The discharge of low quality TV
can lead to the damage of other equipment.
