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Chapter 7 VirtualBench-Arb
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National Instruments Corporation 7-5 Getting Started with VirtualBench
c. Click on New Component. By default, every time you click on
New Component, a new library component is added to any
existing waveform.
d. Select the type of component: Library, Expression, or Sketch.
The following steps further describe how to use these options.
3. Creating a Waveform using the Library Functions.
a. Enter the duration of the waveform in the Duration control.
This control sets the duration of the first segment in the
waveform.
b. Click on New Component. This action adds a component to
the first segment.
c. Be sure that Library is selected in the Component Type
control.
d. Select a waveform from the library and modify the parameters
if necessary.
e. Click on New Component again to add a new component. This
component adds to the first to produce the final segment.
Change the Function selector to perform subtraction,
multiplication, division, or frequency modulation.
f. Click on New Segment to add additional waveform segments
to the end of the waveform.
4. Creating a Waveform from a Mathematical Expression.
a. Create a new segment by clicking on New Segment.
b. Create a new component in the segment by clicking on New
Component.
c. Select Expression from the Component Type control.
d. Enter an expression in terms of variable x, in the expression
box. Any error is indicated in red, with the character position
of the error placed in parentheses.
e. Enter the range for x in the From: and To: input boxes. The
expression is evaluated over this range.
f. You can change the number of cycles of the waveform by
changing the Cycles control.
5. Creating a Waveform from a Freehand Sketch.
a. Create a new segment by clicking on New Segment.
b. Create a new component in the segment by clicking on New
Component.
06Chap07.fm Page 5 Friday, February 28, 1997 3:22 PM