PC Application
User’s Manual 24
Scan: In Scan Mode, the waveform display scan updates from left to right.
In Scan mode, trigger and horizontal offset control of waveforms are available during Scan Mode.
This mode is only available when set to 500ms/div or slower. Generally, used for measuring low
frequency signal.
Roll: In Roll Mode, the waveform display updates from right to left.
In Roll mode, the waveform display rolls from right to left. No trigger or horizontal offset control of
waveforms is available during Roll Mode. This is only available when set to 500ms/div or slower.
Caution: If the time/div bigger than or equal to 500ms, the format will change to Roll mode
automatically. If you want to select Scan mode, please click “Setup -> Horizontal ->Scan” in
main menu to set Scan mode manually.
Change Horizontal Position
Horizontal Position icon: Drag Horizontal Position icon on screen to adjust the trigger position
against screen. Double click the icon to reset the trigger point back to the screen center.
2.7.2 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 AUTO 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.
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