Radio Amateur Quiz Canadian License

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Question A-005-005-002

What is the modulation index of an FM phone transmitter producing an instantaneous carrier deviation of 6 kHz when modulated with a 2 kHz modulating frequency?

Correct Answer

3

Explanation

Modulation Index (MI) = Peak Frequency Deviation (Δf) / Modulating Frequency (fm). MI = 6 kHz / 2 kHz = 3.

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