Which of the following is an indirect way of generating frequency modulated signals?(a) Armstrong modulator(b) Varacter diode modulator(c) Reactance FET modulator(d) Reactance modulatorI have been asked this question in an online interview.My question is from Phase Shift Method topic in division SSB Modulation of Analog Communications

Which of the following is an indirect way of generating frequency modu

1.	Which of the following is an indirect way of generating frequency modulated signals?(a) Armstrong modulator(b) Varacter diode modulator(c) Reactance FET modulator(d) Reactance modulatorI have been asked this question in an online interview.My question is from Phase Shift Method topic in division SSB Modulation of Analog Communications
Answer» Correct OPTION is (a) ARMSTRONG MODULATOR To explain: Varacter DIODE modulator is not an indirect way of GENERATING FM. Instead it’s a direct way of producing FM with the help of voltage controlled oscillator mechanism. It is Armstrong modulator which is an indirect way of generating FM.

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