Ultrak CCU-100HD Manual de usuario Pagina 62

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While an alarm VCR is being used to record alarms, an operator cannot
manually switch another camera to the VCR or turn the VCR off.
EXAMPLE:
The alarm VCRs are 6 through 8 with alarms 1, 2, and 7 being recorded.
Alarm 7 is the oldest alarm and alarm 1 is the newest. Alarm #4 occurs and
cannot be recorded because no alarm VCRs are available. Alarm #4 is
placed in the queue.
Alarm 7 Alarm 2 Alarm 1
VCR 6 VCR 7 VCR 8
Alarm 2 is acknowledged. The CCU switches the oldest alarm (alarm 4) in
the alarm VCR queue to the video output associated with the newly available
VCR, VCR 7.
Alarm 7 Alarm 4 Alarm 1
VCR 6 VCR 7 VCR 8
The CCU leaves the relay contacts associated with the alarm VCRs
energized until the alarms requiring VCRs are acknowledged. Once all
alarms requiring VCRs are acknowledged, the CCU sends control data to
de-energize the contact relays associated with alarm VCRs (video outputs
programmed as alarm VCRs).
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