10
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], [Reflectance]
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 fiber under test.
End
The end of the fiber under test.
Non-
reflective
Loss Event
An event with measurable loss but very small or unmeasurable reflectance, typically
caused by a fusion splice, fiber break, or macrobend (with macrobend detection
disabled).
Non-
reflective
Gainer Event
An event with ‘negative loss,’ which can occur in OTDR traces where two fibers with
very different backscatter coefficients are spliced or connected. A gainer will be seen
as a normal (positive loss) event when tested from the other end of the fiber. The true
loss of the event is approximately equal to the average of its loss measured from each
end of the fiber under test.
Reflective
Event
An event with measurable loss and reflectance, typically caused by a connection or
mechanical splice.