(a) Sketch the spectrum of m(t). (b) Sketch the spectrum of the DSB-SC signal m(t) cos 10,000t. (c) Identify the upper sideband (USB) and the lower sideband (LSB) spectra.
(a) Sketch the spectrum of m(t). (b) Sketch the spectrum of the DSB-SC signal m(t) cos 10,000t. (c) Identify the upper sideband (USB) and the lower sideband (LSB) spectra.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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4.2.2
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![4.2-1 For each of the baseband signals: (i) m(t) = cos 1000t t; (ii) m(t) = 2 cos 1000rt +
sin 200071; (iii) m(t) = cos 1000r t cos 30007 1, do the following.
(a) Sketch the spectrum of m(t).
(b) Sketch the spectrum of the DSB-SC signal m(t) cos 10,000T t.
(c) Identify the upper sideband (USB) and the lower sideband (LSB) spectra.
(d) Identify the frequencies in the baseband, and the corresponding frequencies in the DSB-SC,
USB, and LSB spectra. Explain the nature of frequency shifting in each case.
4.2-2 Repeat Prob. 4.2-1 [parts (a), (b), and (c) only) if: (i) m(t) = sinc (100r); (ii) m(t) = e-l#l;
(ii) m(t) = e-l-1. Observe that e--1 is e-ll delayed by 1 second. For the last case you
need to consider both the amplitude and the phase spectra.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F68b960db-1364-4be9-864e-82ffbb025b03%2Fdce3382f-e01d-4c73-a95e-f0fa09e91248%2F5e2n17b_processed.jpeg&w=3840&q=75)
Transcribed Image Text:4.2-1 For each of the baseband signals: (i) m(t) = cos 1000t t; (ii) m(t) = 2 cos 1000rt +
sin 200071; (iii) m(t) = cos 1000r t cos 30007 1, do the following.
(a) Sketch the spectrum of m(t).
(b) Sketch the spectrum of the DSB-SC signal m(t) cos 10,000T t.
(c) Identify the upper sideband (USB) and the lower sideband (LSB) spectra.
(d) Identify the frequencies in the baseband, and the corresponding frequencies in the DSB-SC,
USB, and LSB spectra. Explain the nature of frequency shifting in each case.
4.2-2 Repeat Prob. 4.2-1 [parts (a), (b), and (c) only) if: (i) m(t) = sinc (100r); (ii) m(t) = e-l#l;
(ii) m(t) = e-l-1. Observe that e--1 is e-ll delayed by 1 second. For the last case you
need to consider both the amplitude and the phase spectra.
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