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Chapter 5 Vertical System
165
5.4.1 Set Channel Coupling
Tap the icon under “Signal” and select “DC”, “AC” channel coupling modes in the pop-up box.
DC: DC coupling. Both the DC component and the AC component of the measured signal can pass, and can be
used to view waveforms as low as 0 Hz without large DC offset.
AC: AC coupling. Measured DC signal is blocked, and only the AC component can be allowed to pass, and used to
view waveforms with large DC offsets.
The oscilloscope is connected to the square wave signal with a frequency of 1KHz, an amplitude of 2V and an
offset of 1V. The waveforms of the channel couplings of DC, AC are shown in Figures 5-7, 5-8.
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