2.1
95-8600
2
General application
inFormation
The xWatch 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 xWatch video driver 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
