An FM modulator has f c = 2000 Hz and f d = 20 Hz/V. The modulator

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An FM modulator has f_c = 2000 Hz and f_d = 20 Hz/V. The modulator has input m(t) = 5 cos[2π(10)t].

(a) What is the modulation index?
(b) Sketch, approximately to scale, the magnitude spectrum of the modulator output. Show all frequencies of interest.

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

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Principles of Communications Systems, Modulation and Noise

ISBN: 978-8126556793

7th edition

Authors: Rodger E. Ziemer, William H. Tranter

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Question Posted: Sep 15, 2018 10:27 AM

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An FM modulator has f c = 2000 Hz and f d = 20 Hz/V. The modulator

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a The peak deviation is 205 100 and f m 10 Thus the modulation index is 10010 10 b The magnitude ...View the full answer

Principles of Communications Systems, Modulation and Noise

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