200 6000 Series Oscilloscope User’s Guide
5 Making Measurements
To use the XY horizontal mode
The XY horizontal mode converts the oscilloscope from a
volts-versus-time display to a volts-versus-volts display
using two input channels. Channel 1 is the X-axis input,
channel 2 is the Y-axis input. You can use various
transducers so the display could show strain versus
displacement, flow versus pressure, volts versus current, or
voltage versus frequency. This exercise shows a common use
of the XY display mode by measuring the phase difference
between two signals of the same frequency with the
Lissajous method.
1 Connect a sine wave signal to channel 1, and a sine wave
signal of the same frequency but out of phase to channel
2.
2 Press the AutoScale key, press the Main/Delayed key, then
press the XY softkey.
3 Center the signal on the display with the channel 1 and 2
position ( ) knobs. Use the channel 1 and 2 volts/div
knobs and the channel 1 and 2 Vernier softkeys to expand
the signal for convenient viewing.
The phase difference angle (θ) can be calculated using the
following formula (assuming the amplitude is the same on
both channels):
θsin
A
B
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or
C
D
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