EXFO FTB-700 for FTB-1 - Manual (Page 71)

Testing Fibers in Template Mode (optional)
OTDR 63
Acquiring Traces in Template Mode
3. Set test parameters.
3a. From the button bar, press OTDR Setup.
3b. Select the Create Ref./Template tab.
If necessary, select Create reference trace to update your
reference trace for the next acquisitions.
This mode will use the first 15 traces (or less, if you stop the
process manually) to continue compiling events.
Note: You can disable the mode by clearing the Create reference trace box
between two acquisitions.