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National Instruments Corporation 7-1 Getting Started with Virtua lBench
Chapter
7
VirtualBench-Arb
In Windows 3.1x, you launch VirtualBench-Arb (Arbitrary Waveform
Generator) by double-clicking on the Arb icon in the VirtualBench
program group. In Windows 95/NT 4.0, you launch VirtualBench-Arb
by selecting Start»Programs»VirtualBench»VirtualBench-Arb.

Waveform Generator Front Panel Features

The key features of the Waveform Generator front panel of
VirtualBench-Arb are:
•Waveform Name/Load Waveform Control—shows the name of
the waveform, if any, that currently loads into the channel buffer.
Select this window to load from a file to a waveform.
•Play Mode—plays the waveform continuously. When deselected,
plays the waveform only once.
•Update Rate—controls the update rate of the waveform. This
control does not affect the play speed of waveform files (.wfm) but
does affect waveform quality. With text and sound (.wav) files, the
update rate determines the play speed by controlling the number of
samples of the waveform that are played per second.
•Frequency Control—modifies the rate at which waveform files
(.wfm) are played. The waveform rate is multiplied by this value to
determine the actual play speed. Text and sound (.wav) files are
unaffected by this control.
Waveform
Name/Load
Waveform
Frequency
Control Update
Rate Amplitude Offset Phase
Play Mode
Play/Stop

06Chap07.fm Page 1 Friday, February 28, 1997 3:22 PM