●
Keep connection lugs in well condition
The signal line and shielded wire should be firm and in well connection. Avoid dry joint,
lap welding and oxidation.
2.3.2 Audio
Input
These series DVR uses BNC port.
Due to high impedance of audio input, you need to use active acoustic pickup.
Audio transmission is similar to video transmission. Try to avoid interference, dry joint,
loose contact or entry of high tension current.
System default opens channel 1 and channel 2 audio function and it does not allow you
to modify, you can set channel 3 and channel 4 audio settings.
(Please note some series DVR do not have audio input function)
2.3.3 How to choose and connect video output device
Video output ways includes a
BNC(PAL/NTSC BNC1.0VP-
P75)
output and a VGA
output
.
We recommend you use the industrial monitor as your video output device.
The industrial monitor has the following advantages:
●
It is suitable for industrially long-time monitor. Ordinary civilian device is easy to
become aging, damaged or even burn down after long-time operation.
●
Has higher definition and color recover ability that the civilian device is incomparable.
●
S
trong stability and anti-interference ability, suitable for various complicated
surrounding.
When you use pc-type monitor to replace the industrial monitor, Please note:
●
To defer aging, do not open for a long time
●
Regular demagnetization will facilitate the monitor to work in normal state.
●
Keep away from strong electromagnetic interference devices.
Using TV as video output device is not a reliable substitution method. You need to
reduce the hours of use and control the interference from power supply or other devices.
The hidden short circuit problem of low quality TV may result in damage to other devices.
2.3.3 Audio
Output
This DVR audio parameter is 200mvp-p 1K(BNC or RCA),. It can connect directly
with low impedance earphone, active pickup or amplifier-drive to enable other audio
output devices.
If there is no sufficient room between sound box and the pickup, it is easily to create
feedback.
In this case you can adopt the following measures:
●
Use pickup with better directionality.
●
Adjust sound box volume
●
Using more sound-absorbing materials in decoration to reduce voice echo and
improve acoustics environment.
Adjust the device layout to reduce the feedback.
(Please note some series DVRs do not have audio input function)
2.4 Alarm Input and Output Device Connection
Before connection, please pay attention to the following points:
2.4.1 Alarm
Input
Check your alarm input modes: grounding alarm input or voltage alarm input.
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