Sencore VB330, Руководство пользователя

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The reason for using error second thresholds is to avoid alarms that toggle on and off, which for a large
monitoring system might otherwise lead to an unintelligible user interface. The VBC thresholds will allow
masking of minor error incidences thus resulting in a control system GUI that presents persistent alarms
only.
The VBC error second thresholds are specified as the number of seconds affected by an error situation.
These thresholds refer to a monitoring window of one hour, meaning that if the number of error seconds
summed over any one-hour period exceeds the associated error second threshold an alarm will be raised
by the VBC.
If a monitoring window different from one hour is selected by the VBC user, the threshold values will be
automatically recalculated to proportional values.
In the ‘VBC threshold presets’ table the ‘Refs’ column shows how many streams are associated with
each VBC threshold template.
By clicking the
Add new threshold
button the user will enter a VBC thresholds edit view enabling
definition of a new threshold template. It is possible to copy or delete an existing threshold template by
clicking the
Duplicate selected or Delete selected button respectively. To edit a highlighted threshold
template, the
Edit selected
button should be clicked.
Multi-edit functionality allows editing several VBC thresholds simultaneously. Highlight the list entries that
should be edited and click the
Edit selected button.
174 VB3xx 10G Probe User’s Manual version 5.3