Drawbacks of PAM method
Drawback of using PAM method is
a) Bandwidth is very large as compared to modulating signal
b) Varying amplitude of carrier varies the peak power required for transmission
c) Due to varying amplitude of carrier, it is difficult to remove noise at receiver
d) All of the above
Correct Answer: All of the above
In PAM, Bandwidth is very large as compared to modulating signal frequency. In PAM, the amplitude of the rectangular pulse train is varied according to the instantaneous value of the modulating signal. Due to this, the required power for transmission is also varied. Due to varying amplitude of carrier, the interference of noise is very high in PAM. So it is difficult to remove noise at receiver.