EXFO IQS-3150 Variable Attenuator for IQS-500/600 - Manual (Page 13)

Introducing the IQS-3150 Variable Attenuator
Variable Attenuator 7
Main Software Features
Output power
Multiple Module Control
The multimodule application is used to control and monitor several
IQS-3150 variable attenuators at the same time.
Display Mode Description
Absolute
(default mode)
The displayed output power takes into account both the absolute
output power value and the offset value.
Displayed power = absolute power + offset value
Reference The displayed output power value is relative to a defined reference
value (see Selecting a Display Mode on page 30).
Displayed power = absolute power – reference value + offset value
X+B The displayed output power is the sum of two elements:
³
X = output power of the unit.
³
B = correction factor. You must define the correction factor for the
test wavelength before enabling the X+B mode (refer to Setting
the B Value on page 23).
Displayed power = absolute power + correction factor
a
+ offset value
a. The correction factor value is specific to the wavelength.