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If the distance is too long, you should use twisted pair cable. You can also add video compensation
devices or use optical fiber to ensure decent video quality.
You should keep the video signal away from the strong electromagnetic interference, especially high
tension currents.
KEEP CONNECTION LUGS WELL CONNECTED
TTTB
The signal line and shielded wire should be fixed firmly into place and have a decent connection.
Avoid dry joints, lap welding and oxidation
BTTTB
2.3.2 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.
2.4 Connecting Audio Input & Output, Bidirectional Audio
2.4.1 Audio Input
These series of product
’s audio input port adopt a BNC port. Due to high impedance of audio input,
please use active sound pick-up. 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.
2.4.2 Audio Output
The audio output signal parameter is usually over 200mv
1KΩ (BNC). It can directly connect to a low
impedance earphone, active sound box or amplifier-drive audio output device.
If the sound box and the pick-up cannot be separated spatially, it is easy to arouse squeaking. In
this case you can adopt the following measures:
Use better sound pick-up with better directing property.
Reduce the volume of the sound box.
