VDH-DRN374 Series Hardware Manual
5
5
HD Digital Output
6
4 channel Audio Input
7
LAN port
8
USB Mouse Port
9
RS-485 Port
10
DC12V Power Input
RS-485 port/DC12 Power Input
3.
Installation Illustration
Video input
Input interface is BNC type; input signal is PAL/NTSC BNC（1.0VP-P，75
Ω
）
The Video signal should comply with national standards, a higher signal to
noise ratio, low distortion, low-interference; clear images, no deformation,
nature color and appropriate brightness.
Make sure stable and reliable signals from cameras
Cameras should be installed in a suitable position to avoid backlighting,
low-light environment, or adopts the better BLC, low-light cameras.
Cameras and digital video recorders should be common ground, stably and
reliably, in order to ensure the normal operation of the cameras.
Make sure the transmission cables are stable and reliable
