Exfo FTB-7000 OTDR Series for FTB-500 Manuale Utente Pagina 319

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Description of Event Types
OTDR 305
Pass/Fail Tests
All Event Types Are Tested
In the first case, where all event types are tested, the pass/fail conditions
are as follows:
³ If the event loss is less than or equal to the smallest threshold value,
then the event status is Pass.
³ If the event loss is greater than the sum of the number of sub-events of
a type, multiplied by the threshold value for this event type, then the
event status is Fail.
³ If the event loss is “in between”, since it is not possible to know exactly
the weight of a sub-event in the merged event, the global event is
considered to have a status of Pass.
If the merged event loss is smaller than or equal to 1.2, then the status is
Pass. Otherwise, it is Fail.
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