EXFO IQS-12004B DWDM Passive Component Test System for IQS-500 - Manual (Page 161)

DWDM Passive Component Test System 149
12 Using the Power Meter
Linearity Verification Tool
Results’ accuracy is influenced by the linearity of the power meters used in
your system. Ideally, the readings of a power meter should be accurate at
each power level.
The Power Meter Linearity Verification tool has been designed to detect
changes in linearity, ensuring that you get the best possible results from
your IQS-12004B DWDM Passive Component Test System.
If the linearity of a power meter seems inappropriate, please contact EXFO.
For information, see Contacting the Technical Support Group on page 223.
The linearity verification is accomplished by comparing the values read
from the power meter to be tested to the readings taken from a calibrated
power meter, acting as a reference.
I
MPORTANT
To optimize results’ accuracy, EXFO recommends that you perform a
linearity verification every six months or at least once per year.