Acquiring and Displaying Waveforms
TDS 684A, TDS 744A, & TDS 784A User Manual 3–37
Figure 3–22: Display Menu — Restore Colors
Zooming on Waveforms
The TDS Oscilloscope can expand or compress (zoom in or out) on a waveform
without changing the acquisition parameters (sample rate, record length, and so
on). This subsection describes how to use Zoom and how it interacts with the
selected waveform. It also describes how interpolation can affect Zoom.
Use Zoom (press the ZOOM button) when you want to temporarily expand a
waveform to inspect small feature(s) on that waveform. For example, to
temporarily expand the front corner of a pulse to inspect its aberrations, use
Zoom to expand it horizontally and vertically. After you are finished, you can
return to your original horizontal scale setting by pressing one menu button.
(Zoom is also handy if you have acquired a waveform at the fastest time per
division and want to further expand the waveform horizontally.)
To help you use zoom effectively, consider how it operates on waveforms. When
zooming vertically, the oscilloscope expands or contracts the selected waveform
only. Also, the oscilloscope only positions the selected waveform when in Zoom.
When zooming horizontally, Zoom expands either the selected waveform, all live
waveforms, or all live and reference waveforms, depending on the setting for
Horizontal Lock in the Zoom menu.

Using with Waveforms