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Sketch approximately to scale the magnitude spectrum of the


An FM modulator has fc = 2000 Hz and fd=

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a. What is the modulation index?

b. Sketch, approximately to scale, the magnitude spectrum of the modulator output. Show all frequencies of interest.

c. Is this narrowband FM? Why?

d. If the same m (t) is used for a phase modulator, what must kp be to yield the index given in (a)?

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Electrical Engineering: Sketch approximately to scale the magnitude spectrum of the
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