EXFO FTB-7000 OTDR Series for FTB-500 - Manual (Page 163)

Analyzing Traces and Events
OTDR 149
Clearing Traces from the Display
Clearing Traces from the Display
Note: This feature is available in all test modes. However, you have to be in
Advanced mode to set the application to automatically clear the traces
from the display (except the reference trace) before launching the
acquisition.
Note: Clearing traces from the display does not delete them from the disk.
Although the test application automatically opens the last trace files used,
you can clear the screen and launch new acquisitions. If a trace you
acquired does not meet your requirements, you can clear that trace and
start over. In Template mode, you cannot clear the reference trace directly;
you have to clear it in Advanced mode, acquire or load another reference
trace, and then return to Template mode.
You can also specify whether you want the application to automatically
clear all files except the reference file when the acquisition is started.