EXFO IQS-1600 High-Speed Power Meter for IQS-500/600 - Manual (Page 105)

Typical Applications
High Speed Power Meter 97
Measuring Insertion Loss
6. In the IQS-1600 Power Meter application (Normal mode), set the
measurement units. The reference value has now been taken and the
display should read “0.000 dB” or “1 W/W”.
7. Switch off the source.
8. Replace the bulkhead connector with the DUT as shown in the figure
on the previous page.
9. Switch on the source and allow it to stabilize (the recommended time
is 60 minutes).
10. The insertion loss of the DUT is the relative measurement as displayed
by the high-speed power meter software. For best results, ensure that
the setup remains stable.
I
MPORTANT
The absolute power output value is not particularly important when
measuring insertion loss. It is very important, however, that the
power level used for taking the reference measurement is identical
to the power level used during the insertion loss measurement.
Power Meter
IQS-1600
ANALOG OUT
EXT.
TRIG
Light Source
IQS-2100
ACTIVE
DUT
IQS-1600 Power Meter IQS-2100 Light Source