RIGOL Chapter 3 To Set the Horizontal System
DS1000Z User’s Guide
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 and adjust the vertical position of CH1 and CH2 to 0.
3. Press X-Y to select “CH1-CH2”, rotate Horizontal SCALE to ajdut the
sample rate properly to get better Lissajous figure for better observation and
measurement.
4. Roate VERTICAL POSITION to adjust CH1 and CH2 to get better
observation of signals. At this point, the circle as shown in the figure below
should be displayed.
5. As shown in the figure above, the distances from the crossing points of axis and
the circle to the origin of the coordinates are approximately equal. Thus, the
phase deviation angle
θ=±arcsin1=90°.
Note:
In YT mode, the oscilloscope could use any sample rate (within the guaranteed
range) to capture waveform. The maximum sample rate of XY mode is 500
MSa/s. Generally, reducing the sample rate properly could improve the display
effect of Lissajous figure.
When XY mode is enabled, “
Delayed Sweep” will be disabled automatically.
Press X-Y to select “CH1-CH2, CH1-CH3, CH1-CH4, CH2-CH3, CH2-CH4,
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