| In addition to
the calculation and display of the time response,
TINA calculates the coefficients of the Fourier
series and the harmonic distortion of periodic
signals using the Fast-Fourier Transform. The
Fourier series is presented both in exponential
and trigonometric form. You can set the sampling
start time, the number of samples, and the number
of harmonics. Using TINA's supplementary
hardware, you can actually measure the harmonic
distortion and the amplitudes of Fourier
coefficients in a real circuit. 
Fourier Spectrum
Once the time response of a circuit is
obtained, the continuous spectrum of non-periodic
signals can also be calculated using Fourier
analysis. The spectrum is displayed in a dual
panel diagram either as amplitude and phase or as
the amplitude of cosinusoidal and sinusoidal
components. You can define the number of FFT
sampling points, the start and end times of the
sampling, and the maximum and minimum frequencies
to be displayed.
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