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You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos o,t, where m(t) is a signal band-limited to 28 Hz (Fig. 1a). Figure 1b shows a DSB-SC modulator available in the stockroom. The carrier generator available generates not cos w,t, but cos3,t. a. Explain whether you would be able to generate the desired signal using only this equipment. What kind of filter is required and what is the value of k? b. Determine the signal spectra at points b and c, and indicate the frequency bands occupied by these spectra. c. What is the minimum usable value of wc?

You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos o,t, where m(t) is a signal band-limited to 28 Hz (Fig. 1a). Figure 1b shows a DSB-SC modulator available in the stockroom. The carrier generator available generates not cos w,t, but cos3,t. a. Explain whether you would be able to generate the desired signal using only this equipment. What kind of filter is required and what is the value of k? b. Determine the signal spectra at points b and c, and indicate the frequency bands occupied by these spectra. c. What is the minimum usable value of wc?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos w,t, where m(t) is a signal band-limited to 28 Hz (Fig. 1a). Figure 1b shows a DSB-SC modulator available in the stockroom. The carrier generator available generates not cos wt, but cos30,t. a. Explain whether you would be able to generate the desired signal using only this equipment. What kind of filter is required and what is the value of k? b. Determine the signal spectra at points b and c, and indicate the frequency bands occupied by these spectra. c. What is the minimum usable value of wc? d. Would this scheme work if the carrier generator output were cos2 wct? Explain. e. Would this scheme work if the carrier generator output were cosn wct for anv integer n 2 2? M(w) km(t) cos wt Filter m(t -4nB 4nB Fig. 1a Fig. 1b cos3w,
Transcribed Image Text:You are asked to design a DSB-SC modulator to generate a modulated signal km(t) cos w,t, where m(t) is a signal band-limited to 28 Hz (Fig. 1a). Figure 1b shows a DSB-SC modulator available in the stockroom. The carrier generator available generates not cos wt, but cos30,t. a. Explain whether you would be able to generate the desired signal using only this equipment. What kind of filter is required and what is the value of k? b. Determine the signal spectra at points b and c, and indicate the frequency bands occupied by these spectra. c. What is the minimum usable value of wc? d. Would this scheme work if the carrier generator output were cos2 wct? Explain. e. Would this scheme work if the carrier generator output were cosn wct for anv integer n 2 2? M(w) km(t) cos wt Filter m(t -4nB 4nB Fig. 1a Fig. 1b cos3w,
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