Receivers for AM and Disadvantage of using a DSB or SSB signal modulation

TRF receiver and super heterodyne receiver are used for

a.) Detection of modulating signal
b.) Removal of unwanted signal
c.) Both a) and b)
d.) None of the above

Correct answer: c.) Both a) and b)

Explanation:

TRF receivers and super heterodyne receivers are used for detection of modulating signal and removal of unwanted signal. The receivers receive the modulated signal and detect the information signal from the received modulated signal.

Disadvantage of using a DSB or SSB signal modulation is

a.) difficult to recover information at the receiver
b.) carrier has to be locally generated at receiver
c.) Both a) and b) are correct
d.) None of the above

Correct Answer: c) Both a) and b) are correct

Explanation:

Disadvantage of using a DSB or SSB signal modulation is that it is difficult to recover information at the receiver. Demodulation depends upon the carrier present in the received signal at the receiver. If the carrier is not present, carrier has to be regenerated at the receiver so a complex circuitry is required.