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Horizontal Controls
The oscilloscope shows the time per division in the status bar. Since all
waveforms use the same time base, the oscilloscope only displays one value for
all channels, except when you use Delayed Sweep. The horizontal controls can
change the horizontal scale and position of waveforms. The horizontal center
of the screen is the time reference for waveforms. Changing the horizontal scale
causes the waveform to expand or contract around the screen center. The
horizontal position knob changes the position of the trigger point relative to the
center of the screen.