EXFO FTB-700 for FTB-1 - Manual (Page 244)

Analyzing Traces with the Bidirectional Analysis Application (Optional)
236 FTB-700 Series
Changing the Attenuation of Fiber Sections
To modify the attenuation of a fiber section:
1. From the main window, select the Edit tab.
2. Under Direction, select either A->B or B->A.
3. Select the fiber section that you want to modify.
4. Press the Modify button.
The A and B markers appear in the trace display.