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14
The camera and the DVR should have the same signal grounding to ensure the normal operation of
the camera.
GUARANTEE STABILITY AND RELIABILITY OF THE TRANSMISSION LINE
BTTTB
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 high
tension current.
KEEP CONNECTION LUGS WELL CONNECTED
TTTB
The signal line and shielded wire should be fixed firmly and have a decent connection. Avoid dry
joint, lap welding and oxidation
BTTTB
3.4.2 Connecting Video Output
Video output includes a BNC (PAL/NTSC1.0V
P-P
,
75Ω
)
output, a VGA and HDMI output. System
supports BNC, VGA and HDMI output at the same time.
When you are using pc-type 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 well maintained.
Keep it away from devices that produce strong electromagnetic interference.
Using a TV as video output device is not a reliable substitution method. You also need to reduce the
working hours and control the interference from the power supply and other devices. The low quality
TV may result in device damage.
3.5 Connecting Audio Input & Output, Bidirectional Audio
3.5.1 Audio Input
These series of product
’s audio input port adopts a BNC port. Due to high impedance of audio input,
please use active sound pick-up (see Figure 3-1). Audio transmission is similar to video
transmission. Try to avoid interference, dry joint, loose contact and it shoul be kept away from high
tension current.
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