Exfo FTB-7000 OTDR for FTB-200 v2 Uživatelský manuál stáhnout pdf (Strana 323)

100

101

Description of Event Types

OTDR 309

Merged Event

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.

Pass/Fail Analysis

Fail Level

Σ(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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