Specifications

RIGOL
DS6000 User’s Guide
3-6
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 to turn on the X-Y mode and then press the XY1 softkey to select
“On”.
3. Use VERTICAL POSITION of CH1 and CH2 to display the signals at the
center of the screen and use VERTICAL SCALE 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 point of intersection of the axis
and the circle to the origin of the coordinates are approximately equal. Thus, the
phase deviation angle =arcsin1=90°.
Notice:
 In Y-T mode, the oscilloscope could use arbitrary sample rate (within the
guaranteed range) to capture waveform. The maximum sample rate of Y-T
mode is 2.5 GSa/s. Generally, reducing the sample rate properly could get a
Lissajous figure with relatively better display effect.