HP HP 54600B, User'S And Service Manual

Page: 62 / 183

XY display mode operating hint
Before entering XY display mode, center both channels on screen in the main
sweep and adjust sweep speed to obtain greater than or equal to 1 cycle of the
lowest frequency input signal on screen.
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 (external trigger in
the HP 54600B and HP 54603B) 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 on and off
the trace (analog oscilloscopes called this Z-blanking because it turned the
beam on and off). When Z is low (<1.3 V), Y versus X is displayed; when Z is high
(>1.3 V), the trace is turned off.
4
Press
Cursors
.
5
Set the Y2 cursor to the top of the signal, and set Y1 to the bottom of
the signal.
Note the
∆
Y value at the bottom of the display. In this example we are using
the Y cursors, but you could have used the X cursors instead. If you use the
X cursors, make sure you center the signal in the Y axis.
XY Display with Cursors On
Figure 2–24
Operating Your Oscilloscope
To use the XY display mode
2–35