EXFO IQS-1500 Power Meters for IQS-500/600 - Manual (Page 44)

Measuring Power
36 IQS-1100/IQS-1500
Using the Offset Function
Using the Offset Function
The offset function is used when you want to take into account, in the
power displayed, a known gain or loss in the link that is not already
included in the signal reaching the detector.
To enter an offset value:
1. From the Settings function tab, select the Channels tab.
2. From the Offset list, use the arrow buttons to adjust the value.
3. Click Apply to confirm your new setting.