EXFO FTB-700 for FTB-1 - Manual (Page 199)

OTDR 191
15 Analyzing Traces with the
Bidirectional Analysis
Application (Optional)
Note: This function is available with the optional Event Characterization (EC)
software package only.
Note: The OTDR Bidirectional application is available from the Utilities tab in
Mini ToolBox.

The OTDR Bidirectional application helps you to perform a
bidirectional analysis on two unidirectional OTDR traces. For the
application to be able to match events, the two OTDR traces must have
been acquired in opposite directions and on the same fiber span.
The application will perform a bidirectional analysis and generate an
events table with the averaged loss for each event; that is, the average
of the losses obtained from both directions.
You can also analyze OTDR traces with multiple wavelengths.
To work with the OTDR Bidirectional application, you must acquire and
save the traces before the analysis.