Direct method for generation of FM signal - Drawbacks & Advantages
Q. Drawbacks of using direct method for generation of FM signal are- Published on 14 Oct 15a. Does not give high stability to FM signal frequency
b. Distorted FM signal is generated due to harmonics of modulating signal
c. Cannot be used for high power FM generation
d. Both a and b
ANSWER: Both a and b
In direct method of FM generation, as the carrier generation is directly affected by the modulating signal, it is not easy to get high order stability in carrier frequency. The non linear characteristics of varactor diode produce a distorted FM signal due to harmonics in the modulating signal.
