User manual

DSO-1102 USB
DSO-2202 USB
USER’S MANUAL 77
appears on the display representing the data points that the oscilloscope obtained with
one acquisition.
This function helps to capture the signal occurrence easily, such as the noise with large
amplitude; set the trigger level higher a little above the normal level and press and wait.
When noise occurs, the instrument will record the waveform before and after the trigger.
4.4 The Application of the X-Y Operation
X-Y Plot acts to analyze correlation of data of two channels. Lissajous diagram is
displayed in the screen when you use X-Y Plot, which enables to compare frequencies,
amplitudes and phases of counterpart waveform against the reference waveform. This
makes it possible to compare and analyze frequency, amplitude and phase between input
and output.
Do these steps as follows:
1. Set the probe attenuation to “x10”. Set the switch to “x10” on the probes.
2. Connect the CH1 probe to the input of the circuit, and connect the CH2 probe to the
output of the circuit.
3. Click
button.
4. Adjust the vertical scale and offset to display approximately the same amplitude
signals on each channel.
5. Select X-Y format at Horizontal window. The oscilloscope will displays a Lissajous
pattern representing the input and the output characteristics of the circuit.
6. Adjust the scale and offset of the horizontal and vertical to a desirable waveform
display. The following picture shows a typical example.
7. Apply the Ellipse Method to observe the phase difference between the two channels.