Which of the following oscillator is not found in FM?(a) Hartley Oscillator(b) Crystal Oscillator(c) Armstrong Oscillator(d) Dynatron OscillatorI got this question during an internship interview.Question is from Generation of VSB in section SSB Modulation of Analog Communications

Which of the following oscillator is not found in FM?(a) Hartley Oscil

1.	Which of the following oscillator is not found in FM?(a) Hartley Oscillator(b) Crystal Oscillator(c) Armstrong Oscillator(d) Dynatron OscillatorI got this question during an internship interview.Question is from Generation of VSB in section SSB Modulation of Analog Communications
Answer» Correct answer is (b) Crystal Oscillator The explanation: In frequency modulation, frequency of the carrier WAVE is VARIED with the INSTANTANEOUS amplitude of message signal. Crystal oscillator is used to GENERATE a carrier signal with a precise or FIXED frequency. But it has no use in frequency modulation.

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