Armstrong method for FM generation

Q.  Armstrong method is used for the generation of
- Published on 14 Oct 15

a. Direct FM
b. Indirect FM
c. SSB-SC
d. DSB-SC

ANSWER: Indirect FM
 
Armstrong method is used for generation of indirect FM signal. Armstrong method generates Frequency Modulated wave from a Pulse modulated wave. It has better frequency stability than other method such as reactance modulator as it uses crystal oscillators.

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