Exercise 2.1 – Analysis (Track A, B, & C)
Create a VI that produces a sine wave with a specified frequency and displays the data
on a Waveform Chart until stopped by the user.
1. Open a blank VI from the Getting Started screen.
2. Place a chart on the front panel. Right-click to open the controls palette and select
Controls»Modern»Graph»Waveform Chart.
3. Place a dial control on the front panel. From the controls palette, select
Controls»Modern »Numeric»Dial. Notice that when you first place the control
on the front panel, the label text is highlighted. While this text is highlighted, type
“Frequency In” to give a name to this control.
4. Go to the block diagram (<Ctrl+E>) and place a while loop down. Right-click to
open the functions palette and select Express»Execution Control»While Loop.
Click and drag on the block diagram to make the while loop the correct size.
Select the waveform chart and dial and drag them inside the while loop if they are
not already. Notice that a stop button is already connected to the conditional
terminal of the while loop.
5. Place the Simulate Signal Express VI on the block diagram. From the functions
palette, select Express»Signal Analysis»Simulate Signal and place it on the
block diagram inside the while loop. In the configuration window under Timing,
choose “Simulate acquisition timing.” Click “OK.”
6. Place a Tone Measurements Express VI on the block diagram (Express»Signal
Analysis»Tone Measurements). In the configuration window, choose Amplitude
and Frequency measurements in the Single Tone Measurements section. Click
“OK.”
