3-41
Using the Analyzer
Measurement Techniques
Using Trace Math to Measure Wavelength Drift
This procedure assumes that you have normalized your test setup and posi-
tioned the response on the display. For more information on these processes,
refer to “Normalizing the Measurement” on page 3-11 and refer to “Status
Reporting for Laser Wavelength Zeroing” on page 3-13.
1
Setup your device so that you can view the response on the display.
2
From the front panel, press
Traces
>
Active Trace
>
TrA
.
3
Press Single Sweep to update Trace A then press
Update A off
.
4
Press
Active Trace
>
TrB
.
5
Press
Sweep
>
Repeat Sweep On
to continuously update the measured
response on Trace B.
6
Press
Traces
>
Trace Math Off
>
Default Math Trace C
>
Log Math C = A – B
.
You can now monitor the wavelength drift of your DUT over time.
Figure 3-17. Top trace shows wavelength drift over time
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com