EXFO IQS-3150 Variable Attenuator for IQS-500/600 - Manual (Page 62)

Controlling Multiple Variable Attenuators
56 IQS-3150
Selecting Modules to Control
Selecting Modules to Control
Before you can modify the module parameters, you must specify which
modules you intend to use.
To select IQS-3150 Variable Attenuator modules:
1. On the Modules/Config function tab, select the boxes corresponding
to the modules you want to control.
OR
Click Select All if you want to work with all IQS-3150 Variable
Attenuator modules.
2. Click Apply Selections and click the Instruments function tab.