EXFO IQS-1600 High-Speed Power Meter for IQS-500/600 - Manual (Page 109)

Typical Applications
High Speed Power Meter 101
Characterizing an Optical Switch
Testing Repeatability
The procedure to test the repeatability of an optical switch is relatively
simple. First, a reference measurement must be taken on each channel.
Next, repetitive transitions of the switch must be performed. The switch
repeatability will be the total deviation from the reference points.
To test the repeatability:
1. Perform an offset nulling if needed.
2. Make sure that the switch is off.
3. Connect the instruments as shown below.
4. Set the power meter channels to the same wavelength as the source.
5. Set the power meter channels to Autorange mode.
6. Switch the source on and allow it to stabilize (the recommended time
is 60 minutes).
2-Ch Power Meter
IQS-1600
EXT.
TRIG
ANALOG OUT
C1
C2
Light Source
IQS-2100
ACTIVE
DUT
(optical switch)
Control signals
IQ-2100 Light Source IQ-1600 Power Meter