HP 8712ET User Manual Supplement page 97

Displaying Measurement Results
Markers
Other marker functions that can be useful are the marker math
functions:
• statistics
• flatness
• RF filter stats
These functions perform certain mathematical calculations on the
amplitude, phase, delay or SWR data of user-defined trace segments. See
"To Use Marker Math Functions" in Chapter 4 of your analyzer's User's
Guide for more information on these features.
Automating Measurements 7-11