EXFO FTB-2 - Manual (Page 142)

Using the Optional Built-In Power Meter and VFL
132 FTB-2 and FTB-2 Pro
To access the built-in power meter or the VFL:
From the main window, tap Power Meter and VFL.
Note: The Power Meter and VFL button is only visible if your unit is equipped
with a power meter and a VFL.
Note: You can access the online help of the power meter and the VFL by tapping
the button from the power meter application.