Rigol DS2000 Series Guia do Utilizador descarregar pdf (Página 62)

RIGOL 3 To Set the Horizontal System

DS2000 User’s Guide

3-6

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 and enable X-Y mode. Rotate Horizontal

SCALE to ajdut the

sample rate properly to get better Lissajous figure for better observation and

measurement.

3. Roate VERTICAL POSITION of CH1 and CH2 to display the signals at the

center of the screen and roate VERTICAL

SCALE of CH1 and CH2 to make

the signals easy to observe. At this point, the circle as shown in the figure below

should be displayed.

4. 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°.

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 263 264

Sem comentários

Rigol DS2000 Series Guia do Utilizador Página 62