ObjectiveMcq
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Which statement is true about direct FM modulator?
Correct Answer: B — Varies the frequency of carrier oscillator
Frequency modulated system can be produced either by direct ways or indirect ways. Armstrong method comes under indirect method. Direct FM modulator is generally used to vary the frequency of carrier oscillator, thus being known as frequency discrimination method, while indirect FM modulator varies the phase of carrier oscillator, thus being called phase discrimination method.