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Discussion: 1. State the advantages and disadvantages of the DSB-SC modulation. 2. Compare between DSB-SC and DSB-LC modulation, considering total power and bandwidth. 3. If a message signal xm(t) = 3 *cos(80007t) is modulated by a carrier signal xe(t) = 4*cos(100000ft), then find: a. Modulation index. b. Carrier frequency. c. Message frequency. d. Bandwidth of the modulated signal. e. Total power of the modulated signal. Hint: Solve for DSB-LC and DSB-SC AM modulation. 15 10 5 -5 -10 -15 0 0.5 1 1.5 2 2.5 3 3.5 4 Figure (1) DSB-SC Signal