Crystal Vision
Appendix 1
Alarms
The GPO 5 and GPO 6 outputs are reserved for alarm
indication and may each be assigned to any of the three
video alarm conditions (four conditions on 3GS and 3GS-
20). Black and Frozen alarms have a delay timer to set
the amount of time that the alarm condition must exist
before the GPO is asserted.
Alarms
Set the various conditions that assert GPO 5 and GPO 6.
GPO 5/6 Asserted
On if GPO is asserted. N.B. Visual indication of GPO status is provided on
the board edge.
Input missing
Assert GPI output if video input is missing.
Refererence missing
Assert if video reference missing (3GS and 3GS-20 models only).
Input video black
Assert GPO if input video is black for the period set by the ‘Black Delay’.
t
l
Input video frozen
Assert GPO if input video is still-frame for the period set by the ‘Frozen
Delay’ control.
Black delay
Set the time period that the video input must remain black before
asserting the GPO. Can be set in the range 1 to 30 seconds.
Frozen delay
Set the time period that the video input must remain frozen before
asserting the GPO. Can be set in the range 1 to 30 seconds.
ViViD 3G User Manual R1.4
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19 January 2021