Specifications

42 Multivision® Pro Installation and Operation Manual
VIDEO LOSS ALARMS
The multiplexer detects loss of video at any connected camera
input by monitoring the camera’s video sync signal. The
VIDEO LOSS ALARM option controls this feature. When this
option is ON (the default), the multiplexer responds to loss of
camera video by alerting the operator and recording the alarm
event on videotape. When the VIDEO LOSS ALARM option
is OFF, video loss is NOT treated as an alarm, and no message
displays.
The multiplexer does the following when it detects loss of
camera video:
1. Flashes the associated camera (1–16) light.
2. Toggles the alarm relay.
3. Switches the call monitor to the lost camera input and
displays the VIDLOSS message.
4. Switches the main monitor to the multicamera format (if
ALARM MESSAGE DISPLAY is ON and the alarm camera
is not already displayed) and displays the VIDLOSS
message.
5. Switches to the VCR ALARM RECORD TIME encoding
rate.
6. Encodes the camera as “video lost” and sends it to the
VCR.
Multiple video loss alarms are processed in the order they
occur.
The multiplexer remains in the alarm state until ALL of the
following occur:
• The ALARM DURATION time elapses.
• The alarm hold input is released.