Audio sine waves of 3 kHz frequency are used to amplitude modulate a carrier signal of 1.5 MHz. Which of the following statements are true? a. The sideband frequencies are 1506 kHz and 1494 kHz. b. The bandwidth required for amplitude modulation is 6 kHz. c. The bandwidth required for amplitude modulation is 3 MHz. d. The side band frequencies are 1503 kHz and 1497 kHz.

Question

KollegeApply · Accepted Answer

b and d Explanation: LSB = (ω_c) = (ω_m) = 1.5 xx 10^6 - 3 xx 10^3 = 1497 kHz And USB = (ω_c) + (ω_m) = 1503 kHz Bandwidth required = USB – LSB = 2ω_m = 2 xx 3 kHz = 6 kHz Also,bandwidth = 2fm = 2 $\times$ 3 = 6 KHz

AChoose Your Answer