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DC coupling,If it is asymmetrical AC signal, or DC pulsating signal,Then when
switching coupling,The waveform will move up and down.
6.Why does the waveform jump up and down when testing the
signal,Can't see a waveform but only see multiple lines beating up
and down?
Answer:Set the trigger mode to "Auto" and press the [AUTO] button o nce,If it
has not been resolved,It may be that the clamp o n the probe is not grounded Or
the clip is broken,Please check the probe and ground clamp with a multimeter.
7.Why does the test waveform keep shaking from side to side,Cannot
be fixed?
Answer:Need to adjust the trigger voltage,The yellow arrow on the right,Press
[SEL] key in trigger mode,After a left arrow [←] is displayed on the upper le ft of
the screen,Push the joystick up and down to adjust the trigger voltage,Need to
adjust the yellow indicator arrow to between the top and bottom of the
waveform,The waveform is triggered,It's fixed.
8.Why can't I capture the sudden pulse waveform or digital logic
signal?
Answer:Press the [SINGLE] button in single trigger mode or adjust to normal
trigger mode,Then adjust the trigger voltage.
9.Why is there no waveform when measuring a battery or other DC
voltage?
Answer:The battery voltage signal is a stable DC signal,There is no curve
waveform,In DC coupling mode,Then adjust the vertical sensitivity,There will be
an upward or downward offset line waveform,If it is AC coupled,No matter how
you adjust it, there is no waveform.
10.Why when measuring the mains 220V waveform,The
peak-to-peak data below is 600V+,Instead of 220V or 310V?
Answer:Mains 220V is a symmetrical AC signal,The maximum positive peak
voltage is +310V,The minimum negative peak voltage is -310V,So the
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