Det-Tronics X7050 xWatch Industrial Video Surveillance Camera - Manual (Page 4)

3.1 95-8600 2
General application
inFormation
The xWatch Explosion-Proof Camera Model X7050 has
a balanced differential video output for driving a long
distance twisted pair signal to a remote site for monitoring
and/or recording. The video output format can be either
NTSC (National Television Systems Committee) or PAL
(Phase Alternating Line).
The video driver of the camera is designed for use with
twisted pair cable of 100 ohm impedance. The best
video performance in terms of distance, video quality,
and cost is attained using 22 AWG to 16 AWG, twisted
pair cable of 100 ohm impedance.
The monitor end must terminate the video cable with 100
ohms. Since most monitors have a built-in termination
resistor of 75 ohms instead of 100 ohms, a balun or other
matching network (video converter) must be used.
A variety of matrix control systems or DVRs can be suitable
for viewing or recording the video signal, depending
on the requirements of the individual application. The
detector’s auxiliary relay contacts are typically used to
signal the video system of an alarm event.
Refer to Figure 1 for a schematic of a typical system.
VIDEO
CCTV MONITOR
OR PC
POWER
B2338
DVR
ETHERNET
(Optional)
Figure 1—system block Diagram