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E8B01:What is the modulation index of an FM signal?

E8B01E8B

What is the modulation index of an FM signal?

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E8B01 is The ratio of frequency deviation to modulating signal frequency.

The key fact is The ratio of frequency deviation to modulating signal frequency. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

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More questions in E8B

E8B02How does the modulation index of a phase-modulated emission vary with RF carrier frequency?E8B03What is the modulation index of an FM phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency if the highest modulating frequency is 1000 Hz?E8B04What is the modulation index of an FM phone signal having a maximum carrier deviation of plus or minus 6 kHz if the highest modulating frequency is 2 kHz?E8B05What is the deviation ratio of an FM phone signal having a maximum frequency swing of plus or minus 5 kHz if the highest modulation frequency is 3 kHz?E8B06What is the deviation ratio of an FM phone signal having a maximum frequency swing of plus or minus 7.5 kHz if the highest modulation frequency is 3.5 kHz?E8B07Orthogonal frequency-division multiplexing (OFDM) is a technique used for which types of amateur communication?