Measuring Waveforms
TDS 684A, TDS 744A, & TDS 784A User Manual
3–97
To perform a tutorial that shows you how to take automatic measurements, see
Example 3: Taking Automated Measurements on page 2–19.
To learn how the oscilloscope calculates each automatic measurement, see
Appendix B: Algorithms on page B–1.
Taking Cursor Measurements
The TDS Oscilloscope provides cursors that measure the difference (either in
time or voltage) between two locations in a waveform record. This section
describes cursors — how to select their type and mode, how to display them, and
how to use them to take measurements.
Cursor measurements are fast and easy-to-take. Cursors are made up of two
markers that you position with the general purpose knob. You move one cursor
independently or both cursors in tandem, depending on the cursor mode. As you
position the cursors, readouts on the display report and update measurement
information.
There are three cursor types: horizontal bar, vertical bar, and paired
(see Figure 3–58).
Horizontal Bar Cursors Vertical Bar Cursors
Paired Cursors
Figure 3–58: Cursor Types
Horizontal bar cursors measure vertical parameters (typically volts).
Vertical bar cursors measure horizontal parameters (typically time or frequency).
Paired cursors measure both vertical parameters (typically volts) and horizontal
parameters (typically time) simultaneously.
Look at Figure 3–58. Note that each of the two paired cursors has a long vertical
bar paired with an X. The Xs measures vertical parameters (typically volts); the
long vertical bars measure horizontal parameters (typically time or frequency).
(See Cursor Readouts on page 3–98 for more information.)
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Cursor Types
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