
Using the Oscilloscope
To zoom on a section of the waveform
3-50
To zoom on a section of the waveform
1 Click and hold the left mouse button or touch screen stylus in a blank space
within the waveform display area, then drag the pointer to draw a rectangle
around the areas of interest on the waveform(s) then release.
2 Click on the Waveform Zoom menu item.
How the zoom takes place depends on whether acquisition is running or stopped. If
running, the oscilloscope adjusts vertical scale, vertical offset, horizontal scale, and
horizontal position as necessary to best rescale the area you defined in step 1. If
stopped, the oscilloscope does a software magnification of the waveform.
In either case, a small dialog box appears in the corner of the screen, with an “Undo”
button; by clicking this button, you will undo the zoom and return the oscilloscope to
its previous settings.
Avoid Overdriving the Vertical Input Amplifiers
When the oscilloscope is running, the input waveform can overdrive the
vertical input amplifiers if you expand the vertical excessively. The result is
distortion of the waveform. Ensure that you select a region that will keep all
of the waveform on the screen vertically.
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