What is the modulation index for the FM to behave as a narrowband?(a) 1(b) 0.5(c) 0.25(d) 0.1The question was asked in examination.My question is based upon Frequency, Phase Modulation, Modulation Index and Sidebands topic in portion Amplitude & Frequency Modulation of Avionics

What is the modulation index for the FM to behave as a narrowband?(a)

1.	What is the modulation index for the FM to behave as a narrowband?(a) 1(b) 0.5(c) 0.25(d) 0.1The question was asked in examination.My question is based upon Frequency, Phase Modulation, Modulation Index and Sidebands topic in portion Amplitude & Frequency Modulation of Avionics
Answer» Correct answer is (c) 0.25 Easiest explanation: When the MODULATION index is AROUND 0.25 the modulation produces only single pairs of significant sidebands LIKE that of AM. This occupies comparatively less SPECTRUM space.

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What is the modulation index for the FM to behave as a narrowband?(a) 1(b) 0.5(c) 0.25(d) 0.1The question was asked in examination.My question is based upon Frequency, Phase Modulation, Modulation Index and Sidebands topic in portion Amplitude & Frequency Modulation of Avionics

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