User`s guide

Initial Setup 2
InfiniiVision Oscilloscopes User’s Guide 69
XY mode
XY mode changes the display from a volts-versus-time display to a volts-versus-volts
display. The time base is turned off. Channel 1 amplitude is plotted on the X-axis and
Channel 2 amplitude is plotted on the Y-axis.
You can use XY mode to compare frequency and phase relationships between two
signals. XY mode can also be used with transducers to display strain versus
displacement, flow versus pressure, volts versus current, or voltage versus frequency.
Use the cursors to make measurements on XY mode waveforms.
For more information about using XY mode for measurements, refer to “XY Horizontal
Mode” on page 220.
Knob softkey
The “Knob “softkey is used in conjunction with Segmented Memory. You can set the
Horizontal Position knob to adjust the horizontal position or move between segments.
See “Segmented Memory” on page 271.
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 channel 4 (or the External trigger on 2-channel models) 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.