Relative Limit Lines - Keysight N9912A User Manual

 Then
 Use the Up / Down arrows and rotary knob to navigate the cursor to the following
 Press
 Press
 Press <Back to return to the Limit menu.

Relative Limit Lines

Relative limit lines are X/Y coordinates that are referenced to the center frequency
(X-axis) and Reference level (Y-axis).
Use relative limits to test devices or signals that are identical except for the center
frequency or amplitude. With relative limit lines in place, you change the center
frequency of the measurement and the limits look as though they are in the same
location.
The same is true for Reference Level. When you expect to measure a different power
level, instead of changing the Y-axis value of all of the fixed limits, simply change to
relative limits. The limits will then remain a constant Y-axis distance from the
Reference Level.
Each limit line can be changed at any time from Fixed to Relative, and Relative to
Fixed.
Data Analysis Features
Limits. A limit line table appears.
Edit
editable cells.
Description - Press Edit, then enter a description for the limit line using the
o
FieldFox labeler (learn how on page 162).
Fixed/Relative – Press
o
Fixed - the limit line does not move. The X/Y coordinates are absolute
o
locations on the screen.
Relative - the limit line moves relative to the center frequency and reference
o
level. Note: It is easiest to first create Fixed Limits, then change this setting to
Relative. Learn more on page 157.
Upper/Lower – Press
o
Upper - FAILS any measured data point ABOVE the line.
o
Lower - FAILS any measured data point BELOW the line.
o
Off/On – Press to toggle between the following:
Edit
o
On - Limit line is drawn on the screen and PASS/FAIL testing occurs.
o
Off - Limit line is NOT drawn on the screen and testing does NOT occur.
o
Frequency – Enter a numeric X-axis value of the data point.
o
Amplitude – Enter a numeric Y-axis value of the data point.
o
then choose from the following:
Add
- Adds a blank X/Y data point below the cursor.
Add Point
o
- Adds a default limit line below the current limit.
Add Limit
o
then choose from the following:
Clear
- Removes the X/Y data point on which the cursor resides.
Clear Point
o
- Removes the limit Line on which the cursor resides.
Clear Limit
o
- Removes ALL limit lines.
Clear All
o
to toggle between the following:
Edit
to toggle between the following:
Edit
157