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Configuring Alarms
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5. In the Properties tab, set the relevant values under Calibration.
6. On the File menu, click Save. Alternatively, click the Save button on the toolbar.
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, and the alarm will be triggered after 3 occurrences
of at least 5 seconds of black within a period of 1 minute.
Luma too high detection
threshold Set the level (in IRE or mV) above which Luma Too High will be reported.
Freeze sensitivity Freeze detection is done by comparing successive frames. Noise in the signal could
disrupt this process, so filtering is added to remove it. Adjust the sensitivity according
to the signal being monitored, on a range of 0 (for a noisy signal) to 16 (for a clean
signal). By default the sensitivity is set at 8, and the alarm will be triggered after 3
occurrences of a least 5 seconds of freeze within a period of 1 minute. Once the alarm
is triggered it will only be released if no other freeze condition is detected over the
specified reset delay period (by default, there is no delay), in order to avoid unwanted
alarm flickering that could be caused by glitches on the signal.
Reset delay The alarm reset delay is the time allowed for an alarm state to be normal before the
system actually clears the alarm. This helps eliminate the false releasing of alarms. The
default value is 0, on a range of 0 to 60 seconds. Note that when setting the reset delay
to any value other than 0, it may happen that the freeze alarm will only be released
after a long time (longer than the value of the reset delay) if the video has short-
duration freezes during the reset delay interval.
SD/HD detection zone Determine the video window area to be monitored for Freeze and Black detection. Two
detection zones can be configured: one for SD signals, one for HD signals.
Audio Calibrations
Overload left/right Select the level (in dBFS, dB, or dBu, depending on the signal source) above which the
audio signal will be considered overloaded.
Silence left/right Select the level (in dBFS, dB, or dBu, depending on the signal source) below which the
audio signal will be considered silenced.
Out of phase Select the sensitivity level below which the audio signal will be considered out of
phase. The sensitivity is a value between -1 and +1, where -1 means completely out
of phase and +1 means perfectly in phase.
Mono An audio source is considered to be mono if the left and right signals are perfectly in
phase (i.e. more likely to be the same). Select the sensitivity level above which audio
will be considered mono. The sensitivity is a value between -1 and +1, where -1
means that everything is considered to be mono, and +1 means that only perfectly in
phase audio will be considered mono.