EXFO IQS-1700 High Performance Power Meter for IQS-500/600 - Manual (Page 54)

Measuring Power
46 IQS-1700
Selecting the Reference Value
Selecting the Reference Value
The reference value influences your measurements once selected and
activated. Whether you select the current module’s power or a set value
from the list, this becomes the basis for your future acquisitions.
To select the reference value:
1. From the Settings function tab, select the Channels tab.
2. Use the arrow buttons next to Reference to select either the current
module’s power or a value from the list, which you can then edit as
explained in the following section.
3. Click Apply to confirm your new setting.
4. From the Instrument function tab, click the Reference button to use
your new reference value.