EXFO FTB-7000 OTDR for FTB-200 v2 - Manual (Page 223)

Analyzing Traces with the Bidirectional Analysis Application
OTDR 209
Viewing Results
For each item listed in the events table, information is displayed. The
information vary depending on the direction that is selected.
Event type detected
(see Description of Event Types on page 297)
Event number
Position: distance between the OTDR and the measured event, or
between the event and the beginning of the fiber span
OR
Length of a fiber section (distance between two events).
Attenuation (loss/distance) of individual fiber section
Average of the loss measured
between A->B and B->A traces
(most important information)
Cumulative loss from span start to span end;
running total is provided at the end of each
event and fiber section.
Current loss in dB
Bidirectional
measurement
Maximum reflectance measured on the
unidirectional traces