Data Analysis FeaturesDELETE_IF
All about Limit Lines
Keysight N9915-90020 User’s Guide 749
All about Limit Lines
Limit lines are visual representations, drawn on the FieldFox screen, of the specified limits for a
measurement. With this capability, you can easily compare measured data versus specifications.
Optionally, you can enable an audible beep and display Pass or Fail information for each
measurement.
— You can have up to as many limit line segments as there are data points for each measurement
trace allowing you to test all aspects of your measurements.
— Limit lines are available in CAT Mode, NA Mode, NF Mode, and SA Mode. Power Meter Mode
uses different limit settings. Learn more in
“Limits” on page 577.
— Limit lines and limit testing are NOT allowed in NA Mode with Smith Chart or Polar display
formats.
— A simple Display Line is also available in I/Q Analyzer, NF, and SA Modes ONLY. Learn more in
“Display Line (I/Q, NF, and SA Modes Only)” on page 759.
— Limit lines can be saved and recalled with an *.sta file. Learn more in“How to Save and Recall
Limits” on page 754. *.sta files can also be saved and recalled independently from the Limit
softkeys. Learn more in
Chapter 33, “File Management.”
How to Create Fixed Limit Lines
There are two ways to build a Fixed limit line:
The following are Limit Options for Limit Lines in CAT, NA, NF, RTSA, and
SA. But, RTSA mode has some exceptions:
–When using the Spectrogram measurement, Limit lines are only available
when the display Measurement Type for Spectrogram View used is:
Overlay.
–RTSA mode does not support any PASS or FAIL features.
–Beep, Warning, and Margin softkeys are grayed out (not active) in RTSA
mode.
IMPORTANT! For CAT and NA modes, limit lines do not apply
where F1 = F2.
The following are Limit Options for Limit Lines in CAT, NA, NF, RTSA, and
SA. But, RTSA mode has some exceptions:
–When using the Spectrogram measurement, Limit lines are only available
when the display Measurement Type for Spectrogram View used is:
Overlay.
–RTSA mode does not support any PASS or FAIL features.
–Beep, Warning, and Margin softkeys are grayed out (not active) in RTSA
mode.