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

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