70 Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide
2 Horizontal Controls
7 Calculate the phase difference using the formula below.
For example, if the first ΔY value is 2.297 and the second ΔY value is 1.319:
Figure 4 Phase difference measurements, automatic and using cursors
sinθ =
second Δ Y
first Δ Y
=
1.319
2.297
; θ = 35.05 degrees of phase shift
Z-Axis Input in XY Display Mode (Blanking)
When you select the XY display mode, the time base is turned off. Channel 1 is the X-axis
input, channel 2 is the Y-axis input, and the EXT TRIG IN is the Z-axis input. If you only want to
see portions of the Y versus X display, use the Z-axis input. Z-axis turns the trace on and off
(analog oscilloscopes called this Z-axis blanking because it turned the beam on and off).
When Z is low (<1.4 V), Y versus X is displayed; when Z is high (>1.4 V), the trace is turned off.
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