HP 54600B User's And Service Manual page 52

Operating Your Oscilloscope
To make cursor measurements
Figure 2–15
Pressing t1 and t2 softkeys simultaneously causes the cursors to move together when the cursor
knob is adjusted.
Figure 2–16
By moving the cursors together, you can check for pulse width variations in a pulse train, as
figures 2-15 and 2-16 show.
2–25