Elenco Computer Inteface for Snap Circuits® - Manual (Page 37)

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Build the circuit shown. If continuing from the previous experiment
then close the Winscope program and run it again, to reset the
settings. Click on the On-Line button to activate, and turn on the
switch (snap part S1). Set Winscope to the settings shown below,
and move the lever on the adjustable resistor (snap part RV)
around to change the waveform and the sound. At some positions
there may be no sound. A sample waveform is shown here.
Settings
Note that in the above display
the Y1 Gain is set high to show
the low energy levels of the
higher frequency components of
the signal, even though the
stronger peaks of the lower
frequency components are off
the top of the display. This can
be deceiving. Now change the
Y1 Gain so that the highest
peak can be seen, this is shown
on the right. Now you see how
the main signal frequency
dominates the others.
Turn on FFT mode to look at the frequency spectrum, try the
settings shown here.
Settings
Y1 Gain