b) A carrier is frequency-modulated with a sinusoidal signal of 2 KHz resulting in amaximum frequency deviation of 5 KHz calculate:1- The modulation index.2- The bandwidth of the modulated signal.3- The amplitude of the modulating sinusoidal is increased by a factor of 3 and itsfrequency is lowered than to 1KHZ . Find the maximum frequency deviation and thebandwidth of the new modulation signal

Answered: b) A carrier is frequency-modulated…

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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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
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
Problem1: the figure shows multiple modulation schemes for the signal that is given by the dashed line sinusoidal function, the X-axis is the time axis is seconds and the Y-axis is the amplitude. Answer the following: 1. What is the value of the duty cycle in A? 2.What is the quantization noise in a modulator that uses a 4-bits register for the analog to digital conversion of the given sinusoidal signal?
Question 4. Select the statement that best describes the PM wave.a. Carrier phase angle changes represent the PM modulated signal, however, unlike FM and AM modulatedcarriers, it is not always easy to see these phase changes in the plot.b. The FM signal accurately represents the message.c. Although PM and FM techniques are classified as angular modulation techniques, they cannot be usedinterchangeably (i.e., modulated with FM and demodulated with PM, and visa versa).d. All statements are correct.
(1-4) A sinusoid of the frequency 2100 Hz is sampled at the rate 8/7 samples per baseband cycle. (a) In time domain, draw one cycle of this sinusoid, the corresponding samples, and the reconstructed signal. What is the frequency of the reconstructed signal? (b) In frequency domain, draw this sinusoid, the corresponding samples, and the reconstructed signal. ?. (1-5) The signal r(t) = 100 sin(100)+75c(100m) in
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One input to a conventional AM modulator is a 600 kHz carrier with amplitude of 22 V. The second input is a 20 kHz modulating signal that is of sufficient amplitude to cause a change in the output wave of +9 V. Determine: a. Upper and lower side frequencies. b. Percent modulation. c. Peak amplitude of the modulated carrier and the upper and lower side frequency voltages. d. Maximum and minimum amplitudes of the envelope. e. Expression for the modulated wave. Then, f. Draw the output spectrum. g. Sketch the output envelope.
H.W: a) Write the equation of the modulated wave in the previous example. b) Sketch the waveform of modulated wave and write its equation if the modulation type is AM/DSB- SC.
zain IQ AM Modulatio... -> AM Modulation 1. What is the main feature in AM modulation, that is used to judge if the modulation is good or not? Explain with examples. 2. Can AM modulated signal change phase and/or frequency? Explain the reason. 3. What is modulation index? Its formula? 4. Plot an AM modulated signal, that has an information signal m(t) = 10 sin(10nt) and a carrier signal c(t) = 15 cos(1000t). Calculate the modulation index (u). Is it a good modulation? If no, suggest a change in one of the signals above and calculate u again, so that it approaches ideal case. 5. Draw the modulation block diagram of AM. ...
The equation of an angle-modulated voltage is v = 10 sin (l08t + 3 sin 104,). What form of angle modulation is this? Calculate the carrier and modulating frequencies, the modulation index and deviation, and the power dissipated in a 100-ohm resistor.
in FM , the maximum allowable frequency deviation is 4kHz and the frequency deviation by noise is 156.42HZ? then the signal to noise ratio is .......
In an Amplitude Modulator where the carrier and modulating signals are both sine waves, the frequency spectrum of the resulting AM signal is shown below. 10V 2V 2V kHz 803 808.6 a) Determine the equation of the modulating signal b) Calculate the bandwidth of the AM signal c) Calculate the effective current of the AM signal thru a 75-ohm load. d) Sketch the AM wave and label the maximum and minimum voltage of the signal.

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