Using the results given in Table 2.1 for the Fourier coefficients of a pulse train, plot the double-sided amplitude and phase spectra for the wave forms shown in Figure 2.34.
(Note that x_b(t) = -x_a(t) + A.
How is a sign change and DC level shift manifested in the spectrum of the waveform?)

Figure 2.34

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Table 2.1 Fourier Series for Several Periodic Signals Signal (one period) Coefficients for exponential Fourier series 1. Asymmetrical pulse train; period = T,: (-).-