Agilent Technologies 54621A User Manual page 204

Making Measurements
To make cursor measurements
X1 X2 Press this softkey to adjust the X1 and X2 cursors together by turning
the Entry knob. The ∆X value will remain the same since the cursors adjust
together.
You can adjust the X cursors together to check for pulse width variations in a
pulse train.
Y1 Y2 Press this softkey to adjust the Y1 and Y2 cursors together by turning
the Entry knob. The ∆Y value will remain the same since the cursors adjust
together.
Cursor Examples
Cursors measure pulse widths other than middle threshold points
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