Rigol DS6000 Series User Manual page 86

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deviation angle obtained should be within the quadrant I and quadrant IV (namely
within (0~π/2) or (3π/2~2π)). If the principal axis of the ellipse is within the
quadrant II and quadrant IV, the phase deviation angle obtained should be within the
quadrant II and quadrant III (namely within (π/2~π) or (π~3π/2)).
X-Y function can be used to measure the phase deviation occurred when the test
signal passes through a circuit network. Connect the oscilloscope to the circuit to
monitor the input and output signals of the circuit.
Application example:
Measure the phase deviation of the input signals of two channels.
Method 1: Use Lissajous method
1. Connect a sine signal to CH1 and then connect a sine signal with the same
frequency and amplitude but a 90° phase deviation to CH2.
2. Press Auto, turn on the X-Y mode and rotate HORIZONTAL
adjust the sample rate properly to get a better Lissajous figure for better
observation and measurement.
3. Adjust the vertical positions of CH1 and CH2 respectively to display the signals at
the center of the coordinate area and adjust the vertical scales of CH1 and CH2
respectively to make the signals easy to observe. At this point, the circle as
shown in the figure below should be got.
4. From the figure above, the distances from the points of intersection of the X/Y
3-6
3 To Set the Horizontal System
SCALE to
DS6000 User's Guide