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Description of Event Types

OTDR 197

Merged Event

All Event Types Are Tested

In the first case, where all event types are tested, the pass/fail conditions

are as follows:

 If the event loss is less than or equal to the smallest threshold value,

then the event status is Pass.

 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.

 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.

Pass/Fail Analysis

Fail Level

(N

sub

x Th

sub

)

= (2 x 0.5) + (1 x 0.2)

= 1.2

Pass

Fail

0.2

1.2

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Exfo OTDR 2 Manual de usuario Pagina 205