EXFO FVA-600 - Manual (Page 15)

FVA-600 9
4 Operating the FVA-600
Variable Attenuator
Selecting Wavelengths
Six wavelengths are already preselected in your unit. The wavelength in use is
displayed in the upper left corner of the screen.
To select a wavelength:
Press
to switch between the available values.
You can edit the six preselected wavelengths. See Editing Wavelength on page 12.
You can also return to the default factory wavelengths. See Reverting to the Default
Settings on page 17.
Setting the Attenuation
You can change the attenuation value while you are performing your tests.
To set the attenuation:
Press and hold
or to set the attenuation rapidly and according to the
selected step size. See Setting Attenuation Step Size on page 12.
OR
Press and hold
and to go to the maximum attenuation, or press and hold
and to go to the minimum attenuation.
Selecting an Operation Mode
The FVA-600 is used in three different operating modes:
³
Absolute mode
³
Relative mode, which allows you to work with a reference attenuation
³
Power mode, which can be used to display the FVA-600 output power after
power edition settings.
To select an operation mode:
Press
to switch between the available modes.
λ
Select
Select
Abs/
Rel/
Pwr