If a FM signal having modulation index mf is passed through a frequency tripler, then the modulation index of output of frequency tripler is ________(a) mf(b) 3mf(c) ^1⁄3 mf(d) ^1⁄9 mfI had been asked this question in an online quiz.My question comes from Modulation Using Non-Linear Devices (Balanced Modulator) in section Amplitude Modulation of Analog Communications

If a FM signal having modulation index mf is passed through a frequenc

1.	If a FM signal having modulation index mf is passed through a frequency tripler, then the modulation index of output of frequency tripler is ________(a) mf(b) 3mf(c) ^1⁄3 mf(d) ^1⁄9 mfI had been asked this question in an online quiz.My question comes from Modulation Using Non-Linear Devices (Balanced Modulator) in section Amplitude Modulation of Analog Communications
Answer» Correct choice is (B) 3mf Explanation: A frequency TRIPLER is a frequency multiplier in which an electronic circuitgenerates an output signal WHOSE output frequency is a harmonic (multiple) of its input frequency. When a FM signal is passed through a frequency tripler, it INCREASES its modulation index 3 times. So the modulation index of output is 3mf.

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