A17) technique. Find the value of the carrier frequency so the bandwidth of thmodulated signal is 1% of the carrier frequency.A.17 An FM signal is described by s(t) = 100 cos (2л.10³t + 10-4 cos (1000лt)).Determine the modulating signal m(t).A.18 Consider a communication channel, transfer characteristic of which is def

Answered: Image /qna-images/answer/dc07cf1e-331d-4ad6-bc2a-4b9c5db21340.jpg

Answered: technique. Find the value of the…

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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The question is in the picture below.
An SSB-AM signal is generated by modulating an 800 kHz carrier by the signal m (t) = cos 2000nt +2 sin 2000nt. The amplitude of the carrier is A. = 100. 1. Determine the signal îm (t). 2. Determine the (time-domain) expression for the lower sideband of the SSB-AM signal. 3. Determine the magnitude spectrum of the lower-sideband-SSB signal.
6. For an FM modulator with modulation index m = 2, modulating signal v, (t) = Vm sin (2x2000t), and an unmodulated carrier v.(t)=8 sin(27800000r), a. Determine the number of sets of significant sidebands. 2 b. Determine their amplitudes. c. Draw the frequency spectrum showing the relative amplitudes of the side frequencies. It is given that Bessel coefficient corresponding to carrier component J(2) equals 0.22. Moreover, a side frequency is not considered significant unless it has amplitude equal to or greater than 1 % of the unmodulated carrier amplitude. Abbreviations: QPSK: Quaternary Phase Shift Keying BPSK: Binary Phase Shift Keying LED: Light Emitting Diode AM: Amplitude Modulation FM: Frequency Modulation
ii) A single sideband AM signal (SSB-SC) is given by s(t) = 10cos(11000 t). The carrier signal is c(t) = 4cos(10000tt). Determine the modulating signal m(t).
In a Frequency Modulator, the carrier signal, ec=8 sin[27(500k)t] is frequency modulated by em=5cos[2n(1k)t]). The Frequency deviation constant of the modulator is K= - 800 Hz/V. Determine: a. Frequency deviation at t=145µsec b. Frequency deviation at t-360usec c. Maximum frequency deviation d. Modulation index of the FM signal e. Equation of the modulated signal f. Instantaneous frequency of the FM signal at t=283usec g. The percent modulation if the modulated signal is for FM broadcast
A spectrum analyzer with an input impedance of 200 is used to measure the power spectrum of an AM signal at the output of a preamplifier circuit. The AM signal has been modulated with a sine wave. The effective carrier power, Pc, is 750mw, and each sideband, PusB and PLSB, is 120mW. Compute the following: 1- The total effective power Pr. 2- The peak carrier voltage, Vc- 3- The modulation index, m, and the percent modulation index. 4- The modulation voltage,Vm. 5- The lower -and upper - sideband voltages, VLSB and VUB. 6- Sketch the waveform that you would you see with an oscilloscope if it were placed in parallel with the spectrum analyzer.
Question 2 (a) Briefly explain the advantage of the following Amplitude Modulation (AM) type and state ONE (1) application for each AM type: i. Double Sideband Full Carrier (DSBFC) ii. Double Sideband Suppressed Carrier (DSBSC) iii. Single Sideband (SSB). (b) The AM waveform for the modulated signal is illustrated in Figure 1. i. Calculate the percentage of modulation index, m. ii. State the type of the modulated signal. Justify the answer. iii. Write the equation for the modulated signal. iv. Calculate the percentage of power efficiency. 3V -1IV Figure 1
An FM signal has a maximum frequency deviation of 1500h and a modulating frequency of 500h, its total power is 6500w, applied to a resistive load of 1ohm, the carrier frequency is 400Mhz. Determine the sensitivity of the modulator, and the magnitude spectrum
Q2: A modulating signal is used to modulate a carrier signal(AM modulation). Let Pr , Pc, Psa. PusB, PLSB and u are the total power, carrier power, side band power, upper side band power, lower side band power and modulation index respectively. Prove the following: a. Pc = Pr () c. Pusp = Pasa =) P, 2+m2. b. PsB = Pr %3D 2+m2 2 (2+m2
D E F
3.7 A modulating signal is of the form: m(t) = 5 sin (2000nt) and the carrier signal c(t) = 10 sin (20000rt) 1. Determine the modulation index. 2. Find the percentage of modulation. 3. Find the frequencies of the sideband. 4. Find the amplitude of each the side bands. 5. What will be the bandwidth of the modulated signal?
Solve C part only.

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