DVR systems DVRxx04LE-A Series - Manual (Page 24)

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Note:
z
You can connect the HDD data cable and the power cable first and then fix the HDD in the
device.
z Please pay attention to the front cover. It adopts the vertical sliding design. You need to
push the clip first and then put down.
3.4 Connecting Power Supply
Please check input voltage and device power button match or not.
We recommend you use UPS to guarantee steady operation, DVR life span, and other peripheral
equipments operation such as cameras.
3.5 Connecting Video Input and Output Devices
Please note the following figure is based on the general series product.
3.5.1 Connecting Video Input
The video input interface is BNC. The input video format includes: PAL/NTSC BNC（1.0V
B
P- P ，
B
75Ω. See Figure 3-1.
The video signal should comply with your national standards.
The input video signal shall have high SNR, low distortion; low interference, natural color and
suitable lightness.
Guarantee the stability and reliability of the camera signal:
The camera shall be installed in a cool, dry place away from direct sunlight, inflammable,
explosive substances and etc.
The camera and the DVR should have the same 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
the high tension current.
Keep connection lugs in well contact
BTTTB
The signal line and shielded wire should be fixed firmly and in well connection. Avoid dry joint,
lap welding and oxidation.
BTTTB
7. Put the cover in accordance
with the clip and then place the
upper cover back.
8. Secure the screws in the
rear panel and the side panel.