EXFO IQS-2600B Tunable Laser Source for IQS Platforms - Manual (Page 28)

Setting Standard Parameters
22 IQS-2600B
Setting the Power
Setting the Power
There are several ways to select a power value for testing.
Whenever you use controls in the Power panel, the LED on the upper
right-hand corner will light up to indicate which settings you are changing.
Entering a Power Value Directly
Any desired power value within the operational limits of the source can be
entered directly by clicking on the numeric box button in the Power panel
of the Instrument function tab.
Your source can either be in Normal Power mode (where the ALC is
enabled), or in Max. Power mode (where the ALC is disabled).
To change the Automatic Level Control status, click the Max Power
button.