EXFO FTB-7000 OTDR for FTB-200 v2 - Manual (Page 128)

Analyzing Traces and Events
114 FTB-7000 Series
Events Tab
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Refl.: Reflectance measured at each reflective event along the fiber.
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Att.: Attenuation (loss/distance) measured for each fiber section.
Note: The attenuation value is always presented in dB per kilometers even if the
distance units you selected are not the kilometers. This follows the
standards of the fiber-optic industry that provides the attenuation values in
dB per kilometers.
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Cumul.: Cumulative loss from the trace span start to span end; the
running total is provided at the end of each event and fiber section.
Cumulative loss is calculated for the events displayed in the events
table, excluding those that are hidden. For a more accurate link loss
value, refer to the loss measurement displayed in the Trace Info. tab.
If you want to modify events or fiber sections, see Modifying Events on
page 138, Inserting Events on page 142, and Changing the Attenuation
of Fiber Sections on page 146.