
75Measuring and Control Blocks
and the modulation amplitude is 0.5. The Gain is the vector amplier with component
multiplication factors 1, 2, 3, so that the input f(k) is the three-dimensional vector. The
dialog box of FFT is shown in Figure 3.6. The block Display from Simulink collection
is set at the FFT output. Besides, FFT output is stored in the workspace. Apurpose of
the blocks Demux and Scope will be explained hereinafter.
FIGURE 3.6 Parameter window of the block FFT.
Peak magnitude spectrum called by Simulink
0
300
200
100
0
–100
–200
246810
Order of harmonic
Magnitude based on
“Base Peak”—parameter
12 14 16 18
FIGURE 3.7 Plot of the Fourier coefcients. ...