Fluke 91 Series II User Manual page 127

Measuring Examples 7 - 13
The display shows the phase between the waveforms on
INPUT A and INPUT B: "phase A>B -120°" (see
Figure 7-12).
To identify the point on the waveforms where the measure-
ment has occurred, you can use the markers on page 3
within the More Scope window.
Figure 7-12 Phase Measurement (with Markers)