EXFO IQS-1600 High-Speed Power Meter for IQS-500/600 - Manual (Page 107)

Typical Applications
High Speed Power Meter 99
Testing Instrument Linearity
To confirm the linearity of the attenuator being used, you need a stable
source (IQS-2100), a variable attenuator, your high-speed power meter,
two test jumpers, and appropriate connector adapters.
Once you are confident with both the test setup and instruments being
used, you can start testing for component linearity.
To confirm the linearity of the attenuator:
1. Perform an offset nulling if needed.
2. Make sure that the source is switched off.
3. Connect the instruments as shown below.
4. Switch on the source and allow it to stabilize (the recommended time
is 60 minutes).
5. With all instruments set to the same wavelength and the attenuator set
to minimum attenuation, take an IQS-1600 reference measurement
and switch to relative display. Next, switch the attenuator to Relative
display mode.
IQS-3100 Variable
Attenuator
IQS-1600
Power Meter
IQS-2100
Light Source
Light Source
IQS-2100
ACTIVE
Variable
IQS-3100
Attenuator
IN
OUT
Power Meter
IQS-1600
ANALOG OUT
EXT.
TRIG