Keysight Technologies 86120D, User Manual, Page: 45 / 104

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 45
Getting Started 1
Step 3. Define Laser-Line Peaks
Peak criteria settings and wavelength limiting allow you to define how
laser line peaks are measured.
How Laser-Line Peaks are Defined
A laser line will only be measured as a peak if the amplitude is greater than
the peak threshold limit and the rise-and-fall (excursion) is greater than or
equal to the peak excursion. In addition, peaks are only measured within
the wavelength limits that you specify.
Figure 25
• In this figure, only three laser lines are identified as peaks: responses 1,
3, and 4.
• Response 2 is not identified as a peak because it is below the peak
threshold.
• Responses 4 and 5 are identified as one peak laser line. This is because
the minimum point between 4 and 5 does not drop to the peak
excursion limit.