Keysight Technologies DSO-X 2014A, User Manual

Page: 53 / 378

Horizontal Controls
2
Keysight InfiniiVision 2000 X-Series Oscilloscopes User's Guide 53
6 Move the Y1 and Y2 cursors to the intersection of the signal and the Y axis.
Again, note the Δ Y value.
7 Calculate the phase difference using the formula below.
For example, if the first Δ Y value is 1.688 and the second Δ Y value is 1.031:
Figure 4 Phase difference measurements, automatic and using cursors
sin θ =
second Δ Y
first Δ Y
=
1.031
1.688
; θ = 37.65 degrees of phase shift
NOTE
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 rear panel 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.