EXFO FTB-700 for FTB-1 - Manual (Page 216)

Analyzing Traces with the Bidirectional Analysis Application (Optional)
208 FTB-700 Series
Viewing Results
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.
Cumulative loss is calculated for the events displayed in the events
table. For the loss value of the complete link (fiber span), 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 229, Inserting Events on page 225, and Changing the Attenuation
of Fiber Sections on page 235.
Event type detected
(see Description of Event Types on page 293)
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).
Reflectance measured at each reflective event
along the fiber
Attenuation (loss/distance) of individual
fiber section
Cumulative loss from span start to span end;
running total is provided at the end of each
event and fiber section.
Loss in dB for each event or fiber section
Unidirectional
traces
Injection level