EXFO IQS-600 Integrated Qualification System - Manual (Page 64)

Setting Up Your Integrated Qualification System
56 IQS-600
Changing the Backlight Level (IQS-605P-HS)
Changing the Backlight Level (IQS-605P-HS)
The backlight has four brightness levels: Off, Low, Medium, and High.
Pressing on the front of your unit enables you to switch between these
levels.
Deactivating the LED Display
Note: This feature is not available in offline mode.
Your testing environment may require total darkness and you do not want
any LED or light activity that could compromise your test results.
Note: The backlight does not automatically turn off. You must adjust it as
explained above.
To deactivate the LED display:
1. Select the Utilities function tab, and then select the System tab.
2. Under IQS Settings, select Turn off All Lights.
3. Click Apply to use the new settings, or click Close to exit without using
the new settings.