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Chapter 4 VirtualBench-DSA
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National Instruments Corporation 4-5 Getting Started with VirtualBench
j. Click on the Triggering tab in the DSA Settings dialog box.
k. Set the Trigger Type to none. This setting puts the acquisition
in a Freerun mode.
l. Click on OK.
3. Change the display indicator (left and right arrow buttons) to
Display 1, in the Display Settings control.
4. Select Channel A or B (depending on where you connected your
signal), in the Channel Selector of the Display Settings control.
5. Select Time Waveform, in the Function Selector of the Display
Settings control. Choose the mode as Magnitude, the Units as
Vrms, and the Scale as Linear.
6. Select Markers Off in the Markers section.
7. Use the left or right arrow buttons to change the display indicator
to Display 2, in the Display Settings control.
8. Select Pwr Spectrum. Select the mode Magnitude, the Units Vrms,
and the Scale dB, in the Function Selector of the Display Settings
control.
9. Click on the Single button. VirtualBench-DSA displays a single
frame of data. The Time Waveform is on Display 1, and the Power
Spectrum on Display 2. If no data is visible, click on the Autoscale
Y Axis button (the button with the y and up/down arrows) in the
06Chap04.fm Page 5 Friday, February 28, 1997 3:21 PM