Table of Contents
Advertisement
7.5
Camera and Monitor Video Connections
7.6
Termination Practices
LTC 8500 Series Video Terminations
Monitor Output Video Connections
EN | 18
Refer to Figure 10 on page 28 for the next series of steps.
Connect the system cameras to the appropriate video inputs, but as a minimum con-
nect one known operating camera to video input #1 on the rear of the main CPU
bay. Use only those inputs that correspond to an installed VIM. Also connect
desired monitors to the rear of the main CPU bay, ensuring to connect at least one
monitor to video output #1. The video outputs are the left-most column of BNC
connectors on the rear of the bay. Use only those outputs that correspond to an
installed VOM.
Video from every video input signal must be "terminated" with a 75 ohm resistance.
Each video line should be terminated exactly once. If video from a given camera is
going to several different devices, only the last piece of equipment on the video line
should be terminated. The following sections detail the ways that various Allegiant
systems terminate video inputs.
Each LTC 8521/00 VIM card has an 8-position DIP switch for selecting the termina-
tion of each individual video line. To terminate an input line, make sure that the
appropriate DIP switch on the VIM card is ON. If non-terminated operation is
required for looping purposes, turn the switch OFF (Switch 1 corresponds to the first
video input channel of the card).
The LTC 8500 Series main bays do not directly support video input looping connec-
tions. To attach video signals to inputs that will be looped on this system, a short
piece of coax connected to a BNC "T" connector that has three (3) female ends is
required.
Identical to camera inputs, monitor outputs on the Allegiant system are designed to
be terminated. Each monitor output expects to be connected to a 75 ohm load. This
is the regular load typically provided by a normal monitor. If a monitor output line
is "looped" through several monitors or other equipment, the system installer should
make sure that only the last unit on the line is terminated.
Bosch Security Systems | December 13, 2005
Hide quick links:
Advertisement
Table of Contents
