EXFO FTB-1 - Manual (Page 128)

Using the Optional Built-In Power Meter and VFL
118 FTB-1
To access the built-in power meter or the VFL:
1. From Mini Toolbox, tap Power Meter and VFL.
2. If the module that you are using with your platform is equipped with an
inline power meter, tap the item corresponding to the power meter
that you want to use.
Note: If you want to use the built-in VFL, select either Power Meter and VFL or
VFL, depending on the configuration of your unit.
Note: You can access the online help of the power meter and the VFL by tapping
the button from the power meter application.