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2.4.2 Video output connections and options
The video output is divided into PAL/NTSC BNC(1.0V
When replace the monitor using a VGA computer display, there are some issues to notice
1、Do not stay in the turn-on state for a long time.
2、Keep the computer display normal working
3、Stay away from the electromagnetic Interference.
2.4.3 Audio signal input
Audio port is BNC connection.
The input impedance is high so the tone arm must be active.
The audio signal line should be firm and away from the electromagnetic Interference and connected
to avoid false and joint welding and oxidation. The high voltage current should be avoided especially.
2.4.4 Audio signal output
Commonly the output parameter of DVR audio signal is greater than 200mv 1K
connect the low impedance earphone and active sound box or other audio output equipment through
power amplifier.
If the sound box and the tone arm cannot be isolated, howling phenomena is often
existed. There are some methods to deal with the above phenomena.
1、 Adopt better directional tone arm.
2、 Adjust the sound box volume to be under the threshold that produces the howling phenomena.
3、 Use fitment materials that absorb the sound to reduce reflection of the sound.
4、 Adjust the layout of the sound box and the tone arm.
,75 ) and VGA output(selective configuration).
P-P
7
(BNC) which can
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