EXFO Inline Power Meter - Manual (Page 14)

Using the Optional Power Meters and VFL
10 Power Meter and VFL
Measuring Power or Insertion Loss
Measuring Power or Insertion Loss
Measuring absolute power or link (insertion) loss is done the same way,
except for the referencing step. You can take power or insertion loss
measurements and save them for further analysis.
You can either perform measurements manually and select each
wavelength yourself, or you can use the auto-wavelength and
auto-switching modes of your source, if the model allows it.
Note: Not all power meters have auto-wavelength and auto-switching detection
capacities. If the auto mode is not available, you cannot select it in the
Wavlength list. However, if the power meter has the capacity, but the auto
mode is still not available, a firmware update may be required. Please
contact EXFO to see how to proceed to update the firmware.
I
MPORTANT
If you intend to take measurements with a very low power level
using the built-in power meter, make sure that your testing
conditions are optimal to ensure the best results (for example, do
not use the VFL).