Grass Valley Kaleido-X v.7.80 - Manual (Page 180)

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Configuring Alarms
Configuring Alarm Thresholds
Example of alarms related to video and embedded audio input signals,
for Kaleido-X, Kaleido-X16, and KMV-3901/3911 multiviewers.
3 In the Properties pane, set the relevant values under Calibration.
Video Calibrations
Black detection
threshold Set the level (in IRE or mV) below which the signal will be considered
to be black. By default the threshold is set at 8 IRE.