Exfo FTB-700 for FTB-1 Manuale Utente Pagina 307

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Description of Event Types
OTDR 299
Positive Event
Positive Event
This event indicates a splice with an apparent gain, due to the junction of
two fiber sections having different fiber backscatter characteristics
(backscatter and backscatter capture coefficients).
A loss value is specified for positive events. The loss specified does not
indicate the true loss of the event.
The true loss has to be measured by performing bidirectional fiber
measurements and bidirectional analysis.
Reflected power
(dB)
Distance
(km)
Positive event
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