Analog Communication - Electronic Engineering (MCQ) questions & answers for Q. 13661
Q. Disadvantages of using synchronous detection of AM signal are:- Published on 13 Oct 15a. Needs additional system for generation of carrier
b. Needs additional system for synchronization of carrier
c. Receiver is complex and costly
d. All of the above
ANSWER: All of the above
Disadvantages of using synchronous detection of AM signal are that it needs an additional system for generation of carrier. The frequency of the locally generated carrier must be identical to that of transmitted carrier. And the phase of the locally generated carrier must be synchronized to that of transmitted carrier otherwise the detected signal would get distorted so it needs an additional system for synchronization of carrier. This makes the receiver complex and costlier.
