Tow audio signals, each covering the range 0 to 15 kHz, are to be combined and transmitted via FM as shown in figure below, for this system: - If the amplitude of the signal at point (3) is increased by a factor of three, find the bandwidth and modulation index at point (4). M1(f) f 15kHz (3) (4) M2(f) 2 coswlt FM fl-40KHZ O/P Modulator 1 Carrier= 90 MHz B= $ 15kHz (2)

Tow audio signals, each covering the range 0 to 15 kHz, are to be combined and transmitted via FM as shown in figure below, for this system: - If the amplitude of the signal at point (3) is increased by a factor of three, find the bandwidth and modulation index at point (4). M1(f) f 15kHz (3) (4) M2(f) 2 coswlt FM fl-40KHZ O/P Modulator 1 Carrier= 90 MHz B= $ 15kHz (2)

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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What is the reason why FM modulation is preferred over PM, do you write down advantages and disadvantages of each?
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For an AM, DSBFC modulator with a carrier frequency fc=801KHz and a maximum modulating signal frequency fm=9KHz, determine: a. Frequency limits for upper and lower side band b. Bandwidth c. Draw the output frequency spectrum c. d. State two advantages and two disadvantages of FM over AM.
i)Modulation process takes place in the modulator with two injection signals namely data orinformation and carrier. It is a vital step in generating a decent signal for electronic communication.Whenever the carrier is modulated by the information signal, new signals at different frequenciesare generated as part of the process. These new frequencies occur in the frequency spectrum withinthe range of the carrier frequency. Conclude these frequencies and mathematically explain itsgeneration with the help of diagrams. A) Upper sideband and lower broadbandB) Lower sidefloor and upperside floorC) Lower peak and upper peakD) Upper sideband and lower sidebandE) Lower bandwidth and upper gainF) All of the aboveG) None of the above
1 Can we generate FM signal using PM modulator? * Yes No
Q2. For the scheme shown in Figure Q2, i. Draw the spectrum of the baseband signal (multiplexer output) for the multiplexer. ii. Determine the bandwidth of the baseband signal (multiplexer output) for the multiplexer. i. Determine the minimum transmission bandwidth of the multiplexer. Explain, briefly, the modification needed for the multiplexer in the figure to achieve this bandwidth. 4 kHz cos 10,000xt Basebund signal cos 24,000mt cos 2000mt cos 32,000nt Figure Q2
Q2. For the scheme shown in Figure Q2, Draw the spectrum of the baseband signal (multiplexer output) for the multiplexer. Determine the bandwidth of the baseband signal (multiplexer output) for the multiplexer. Determine the minimum transmission bandwidth of the multiplexer. Explain, briefly, the modification needed for the multiplexer in the figure to achieve this bandwidth. i. ii. ii. 4 kHz cos 10,000xt Baseband signal 2 kHz cos 24,000nt cos 2000nt cos 32,000nt Figure Q2
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