Amplitude modulation is obsolete but still in widespread use.
a. A baseband sine wave signal with frequency 4.0 kHz is modulated onto a carrier at 1.050 MHz using DSB-LC AM. What are the frequencies of the sidebands of the RF signal?
b. In part (a) above, what bandwidth is required to transmit the RF signal?
c. Write down two disadvantages of DSB-LC AM as a modulation for broadcasting sound radio signals.
a. The frequencies of the sidebands of the produced AM signal are 1.054kHz and 1.046kHz.
b. The bandwidth of DSB-LC is twice the modulating signal. So the bandwidth is:
B = 8kHz
This posting contains the solution to the given problems.