4-10 4.4-10 Consider a VSB amplitude modulation system. The baseband signal is an audio signal of bandwidth 4 kHz. The carrier frequency is 1500 kHz. Suppose that the transmission vestigial filter Hi) has an even frequency response as shown in Figure P4.4-10. (a) Design and illustrate a receiver system block diagram. (b) Find the bandwidth of this transmission. (c) Describe and sketch the necessary equalizer filter response Ho(f) for distortionless reception. 1 -0.5 1.496 1.499 1.5 1.501 f. MHz

4-10 4.4-10 Consider a VSB amplitude modulation system. The baseband signal is an audio signal of bandwidth 4 kHz. The carrier frequency is 1500 kHz. Suppose that the transmission vestigial filter Hi) has an even frequency response as shown in Figure P4.4-10. (a) Design and illustrate a receiver system block diagram. (b) Find the bandwidth of this transmission. (c) Describe and sketch the necessary equalizer filter response Ho(f) for distortionless reception. 1 -0.5 1.496 1.499 1.5 1.501 f. MHz

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...

See similar textbooks

Similar questions

then second questrion po eh eto 2. Determine the over-all transmittance of the signal flow graph shown below.
Q4: A Sinusoidal carrier frequency of 1.2MHZ is amplitude modulated by a sinusoidal voltage of frequency 20KHZ resulting in maximum and minimum modulated carrier amplitude of 110V & 90V respectively. Calculate: I. frequency of lower and upper side bands. II. unmodulated carrier amplitude. III. Modulation index. IV. Amplitude of each side band.
4. Write down the general expressions of frequency modulated signal and phase modulated signal. And show the methods to generate FM signals.
Question 4 a. AM modulation is inefficient. With reference to the frequency domain, explain why. How does double sideband and single sideband suppressed carrier modulation improve the efficiency of AM modulation? Despite its increased efficiency, what is a disadvantage of SSB-SC when compared with AM modulation. b. An antenna has an impedance of 75 N. An unmodulated AM signal produces a current of 3.4A. The modulation is 90 percent. Calculate (a) the carrier power, (b) the total power, and (c) the sideband power. c. With aid of diagrams, explain how frequency modulation works.
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
4. Given FM modulator with the following parameters: Frequency deviation = 44 kHz Modulating signal, vm = 2 sin (2rókt) a) Determine the modulation index. b) Determine number of sets of significant side frequencies. c) Determine the bandwidth using both Bessel function and Carson's Rule. d) Sketch the output frequency spectrum for the Bessel approximation.
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
A 1500 KHz carrier with amplitude of 50 V is amplitude modulated by 2 –KHz sine wave tone with a peak voltage of 15 V. Determine the modulation index, percent modulation, the upper and lower sideband frequencies, bandwidth of the wave, and write the AM equation.
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
QL. An indirect Armstrong method is used to produce a wideband frequency modulated signal with carrier frequency of 100 MHz and maximum frequency deviation of 75 kHz. In this Armstrong modulator circuit, a narrowband Frequency Modulation modulator is used to produce an initial carrier frequency of 10 kHz and frequency deviation of 36.62 Hz. (1) With the aid of block diagram, determine the value of the required frequency multiplier (using only a single multiplier) and possible local oscillator frequencies.
help please with explain A narrowband FM signal has a carrier frequency of 110 kHz and a deviation ratio of 0.05. The modulation bandwidth (signal bandwidth) is 10 kHz. This signal is used to generate a wideband FM signal with a deviation ratio of 18 and a carrier frequency of 98 MHz. a) Give the required value of frequency multiplication, n. b) Give two frequencies for the mixer to give the desired carrier. c) Define the required bandpass filter (center frequency and bandwidth).
Select an answer6. For an AM-DSB-SC system to become AM-DSB-TC, the modulating signal must include ...A. a CD offset.B. AC signals only.C. RF spectral components.D. only sine functions.