EXFO FVA-3150 Variable Attenuator - Manual (Page 34)

Setting Up Your Variable Attenuator
28 FVA-3150
Selecting and Using an Attenuation Display Mode
To use the offset mode:
1. Ensure that the display is in Absolute mode (select Abs).
2. Select the appropriate wavelength by pressing  until you reach the
desired wavelength.
3. If necessary, set an offset value.
4. Select Offset. The display will switch to Offset mode.
Note: The offset value can be modified while Offset mode is active.
Offset
dB
dB
Offset attenuation
(actual attenuation is -6.00 dB)
Offset value for the
current wavelength