Answer Happy

= = = The output of an Amplitude Modulated (AM) is given as: y(1) = 4 cos (38007t) +16 cos(400xt) + 4 cos (420071) The signal is expressed in form as: y(t) = A (1+pl cos(277 fm+))cos (21 f 4). Use the above preamble to solve question 39 to 42 39. Find {fm, fc} in Hz, where fm is the bandwidth of the baseband signal, and f, is the frequency of the carrier. A. fm = 100, fe = 1000 B. fm = 50, f. = 2000 C. fm = 100, f. = 2000 D. fm = 200, fe = 2000 40. For the question in 39, determine the modulation index, u and the amplitude of the carrier, A in volts A. U = 0.5, A=16 B. M = 0.5, A = 32 C. H=0.25, A=16 D. HL=0.5, A = 8 41. For the signal given in question 39, find the sideband power in watts. A. 32 B. 16 C. 4 D. 8 42. For the signal given in question 39, find the power efficiency of the modulation scheme. A. 1/9 B. 1/6 C. 1/18 D. 1/3 43. For the value of A found in question 40, find the maximum amplitude of the message signal such that the envelope of the signal can be detected without any distortions. A. 2 B. 16 C. 64 D. 8