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Using the Oscilloscope
Graphical User Interface
particular measurement situation. For example, it might be easiest to set a
coarse vertical scale using the knobs, then fine-tune the setting using the
graphical user interface.
The graphical interface is arranged so that the most common functions affecting
the waveform display are located around the edge of the waveform viewing area.
These include the measurement toolbar, horizontal and trigger toolbar, and
vertical toolbar.
Measurement Toolbar
The measurement toolbar contains icons representing the most commonly used
automatic measurements built into the oscilloscope.
Drag and Drop Measurements By dragging one of the measurement
icons to a waveform in the waveform display area, you can make that
measurement on the waveform. As you drag a measurement icon around
the screen, the icon outline changes color to match the color of the closest
waveform. This makes it easy to see which waveform will be measured
when you drop the icon. For those measurements that are done on
waveform features, the measurement is made at the feature closest to the
location where you dropped the icon. For example, you might want to
measure the rise time of the fifth rising edge; dropping the rise time
measurement icon at that edge will cause the measurement to be made on
that edge.
You can also make a measurement by simply clicking the icon on the
measurement toolbar, then selecting the source to be measured in the dialog
box that appears. When you start a measurement this way, any measurements
on waveform-specific features will measure the feature closest to the horizontal
reference indicator.
Each waveform can have multiple simultaneous measurements and the
measurements can all be of the same type, if desired. For example, you can
have 3 pulse width measurements on different parts of the same waveform.
Geometric Measurement Indicators For each measurement currently
running, a geometric indicator at the measurement location on the
waveform corresponds to an identical indicator in the measurement results
readout. This makes it easy for you to verify that the readout shows results
for the correct waveform and the correct feature on that waveform. See
figure 3-36 for an example.
Tool Tips To find out what a particular measurement tool does, move the
mouse pointer over it for a moment. A small popup will appear that
describes the measurement.
3-23
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