Ultrak CCU-100HD User Manual page 20

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• Ultrak HD Series Video Switcher Interface
The CCU-100/HD Central Control Unit communicates with an Ultrak HD Series
Switcher at COM2. The CCU sends video switching commands (128 video
inputs by 32 video outputs) to the switcher, provides programming for the video
alarms monitored by the HD switcher, and sends pan, tilt, and camera lens
commands to the HD switcher.
The camera title for each video input on the switcher can be programmed using
the CCU and a KBD-100A keyboard. The time and date in the switcher is
programmable through the CCU. The CCU updates the time and date in the
switcher every minute to keep the time in both units synchronized. The
positioning of the camera title and the date and time on each video output can be
programmed through the CCU.
The HD switcher can be programmed through the CCU to monitor each video
input channel for Video High, Video Low, and Loss of Video Sync and generate
an alarm. Video alarms for each channel can be enabled or disabled
individually. If a video alarm is enabled, the HD switcher monitors the video
level. If a video alarm is disabled, the HD switcher ignores the video level. If the
switcher detects high video, low video or loss of video sync, an alarm is
generated. When a video alarm occurs, the switcher sends the type of alarm and
the channel in alarm to the CCU. The CCU sends a message to the HD switcher
to display text for the oldest video alarm on one of the system monitors. This
monitor is referred to as the alarm display monitor and is user programmable
through the CCU. The CCU keeps track of which video channels are switched to
which monitors. If the video channel on the selected alarm display monitor is in
alarm, the alarm text cannot be displayed on the monitor. In this case, the CCU
searches its tables for a video channel that is not in alarm and sends a message
to the switcher to switch the channel with a good video signal to the alarm
display monitor so the alarm text can be displayed.