EXFO FastReporter 2 - Manual (Page 81)

Working with Projects (FR2-FC Mode)
Post Processing Software 71
Working in Loopback Mode
Performing Bidirectional Loopback Measurement
The bidir loopback mode is available when you select at least two files.
The steps are quite similar for the iOLM and OTDR modes; the iOLM steps
will be shown here for illustration purposes.
To perform a bidirectional loopback measurement:
1. Select the files that will be paired up.
2. From the Tools menu, select either the iOLM or OTDR menu, then
select Create Loopback Bidirectional Files.
3. If needed, rearrange the files in the list. Since they appear in the same
order as they are in the Files tab, they may not be paired as you need
them. You can sort the files using the headers in the table, or you can
drag the files manually in the list. Once you are done, click Next to
proceed to the next step.
If you swap a pair, the application will ask you if you want to
automatically swap the other pairs in the same way.