AFL FlexTester 3 - Event Types

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OTDR Mode: Event Table Page Features
Event Table is automatically generated when the [Events] are set to [Auto] in the OTDR Event settings display.
Event Table displays:
[Number] of each event, event [Location] in
user selected units, event [Type], [Reectance]
and [Loss] in (dB) and loss/distance (dB/km).
Trace Graph.
For multiple-wavelength tests, press to toggle
the wavelength and display event table for
that wavelength.
Event Types
ICON EVENT TYPE DESCRIPTION
Start The start of the ber under test.
End The end of the ber under test.
Non-
reective
Loss Event
An event with measurable loss but very small or unmeasurable reectance, typically
caused by a fusion splice, ber break, or macrobend (with macrobend detection
disabled).
Non-
reective
Gainer Event
An event with ‘negative loss,’ which can occur in OTDR traces where two bers with
very different backscatter coefcients are spliced or connected. A gainer will be seen
as a normal (positive loss) event when tested from the other end of the ber. The true
loss of the event is approximately equal to the average of its loss measured from each
end of the ber under test.
Reective
Event
An event with measurable loss and reectance, typically caused by a connection or
mechanical splice.