Agilent Technologies MSO6012A User Manual page 231

5 Making Measurements
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Expand the display with delayed sweep, then characterize
the event of interest with the cursors.
Figure 36 Cursors track delayed sweep
Put the X1 cursor on one side of a pulse and the X2 cursor
on the other side of the pulse.
Figure 37 Measuring pulse width with cursors
6000 Series Oscilloscope User's Guide