3B Scientific Software for Fourier Analysis - Manual (Page 2)

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2. System requirements
• Windows XP or higher;
• 512 MB RAM or higher;
• 128 MB Graphic card or higher;
• 16 bit Sound card or higher;
• Computer links: Microphone input; Line out
3. Operation
To run the software only double click on the file:
"Fourier Analysis Large Final.exe" or "Fourier Analysis
Small Final.exe".
The user needs administration rights os hic com-
puter to use the software.
3.1 Producing synthesized waveforms
The software has two main modes of operation
which are controlled using the Wave Source toggle
switch shown below.
• Synthesized sets the computer to produce the
waveforms.
• Microphone sets the computer to record wave-
forms through the microphone input.
3.2 Producing standard synthesized waveforms
Standard preset wave forms or manual ones can be
selected using the vertical toggle switch shown be-
low.
• Standard Waveforms enables you to select from 5
different types of waves by clicking inside the
fields shown in the table.
• Manual enables you to create your own wave-
forms by adjusting the amplitudes and frequen-
cies.
Triangular wave
Square wave
Positive going sawtooth
Negative going sawtooth
AC rectified
In order to obtain a perfect representation of the
waveforms selected it is necessary to use an infinite
number of higher harmonics. This software is re-
stricted to a maximum of 10. The number of compo-
nents to be included in the series can be set by typ-
ing a number in the black "n =" box at the top of the
Σ shown below (displaying number 8).
The black "n =" box at the bottom of the
Σ is set
automatically by the type of preset waveform being
displayed. Some waveforms use all the harmonics
others only use the odd harmonics.
Pressing the Show/Hide Components button displayed
below lets you show or hide the individual wave
components.
The components are shown in white, and the resul-
tant waveform is displayed in yellow: