Fundamentals of Electric Circuits
6th Edition
ISBN: 9780078028229
Author: Charles K Alexander, Matthew Sadiku
Publisher: McGraw-Hill Education
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Chapter 18, Problem 62P
To determine
Find the frequency ranges of lower sideband and upper sideband.
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An AM signal is provided below. The carrier frequency is 500 Hz, and the modulating signal is a single-tone sinusoidal signal. The x-axis is in time while the y-axis is the amplitude of the AM signal. Answer the following questions with appropriate solutions if applicable.
Determine the type of AM signal in the figure.
Determine the frequency of the message signal in Hz.
Determine the peak voltage level of the carrier in V.
Determine the peak voltage level of the modulating signal in V.
Determine the modulating index.
Determine the power of the unmodulated carrier in W. Assume the load resistance to be 1-ohm.
Determine the power of sidebands in W.
Please explain the waveforms, what are the reason why does the 3rd waveform is attenuated.
1st waveform: Carrier signal (2Vpk,20 kHz)
2nd waveform: Information signal (1Vpk,1kHz)
3rd waveform: Receiver signal
Chapter 18 Solutions
Fundamentals of Electric Circuits
Ch. 18.2 - Prob. 1PPCh. 18.2 - Prob. 2PPCh. 18.2 - Prob. 3PPCh. 18.3 - Prob. 5PPCh. 18.3 - Prob. 6PPCh. 18.4 - Prob. 7PPCh. 18.4 - Prob. 8PPCh. 18.5 - (a) Calculate the total energy absorbed by a 1-...Ch. 18.5 - Prob. 10PPCh. 18.8 - If a 2-MHz carrier is modulated by a 4-kHz...
Ch. 18.8 - Prob. 12PPCh. 18 - Prob. 1RQCh. 18 - Prob. 2RQCh. 18 - The inverse Fourier transform of ej2+j is (a) e2t...Ch. 18 - Prob. 4RQCh. 18 - Prob. 5RQCh. 18 - Prob. 6RQCh. 18 - Prob. 7RQCh. 18 - Prob. 8RQCh. 18 - A unit step current is applied through a 1-H...Ch. 18 - Prob. 10RQCh. 18 - Prob. 1PCh. 18 - Prob. 2PCh. 18 - Prob. 3PCh. 18 - Prob. 4PCh. 18 - Prob. 5PCh. 18 - Prob. 6PCh. 18 - Prob. 7PCh. 18 - Prob. 8PCh. 18 - Prob. 9PCh. 18 - Prob. 10PCh. 18 - Prob. 11PCh. 18 - Prob. 12PCh. 18 - Prob. 14PCh. 18 - Prob. 15PCh. 18 - Prob. 16PCh. 18 - Prob. 17PCh. 18 - Given that F=Fft, prove the following results,...Ch. 18 - Prob. 19PCh. 18 - Prob. 21PCh. 18 - Prob. 22PCh. 18 - Prob. 23PCh. 18 - Prob. 24PCh. 18 - Prob. 25PCh. 18 - Prob. 26PCh. 18 - Prob. 27PCh. 18 - Prob. 28PCh. 18 - Prob. 29PCh. 18 - For a linear system with input x(t) and output...Ch. 18 - Prob. 31PCh. 18 - Prob. 32PCh. 18 - Prob. 33PCh. 18 - Prob. 34PCh. 18 - Prob. 35PCh. 18 - Prob. 36PCh. 18 - Prob. 37PCh. 18 - Prob. 38PCh. 18 - Prob. 39PCh. 18 - Prob. 40PCh. 18 - Prob. 41PCh. 18 - Prob. 42PCh. 18 - Prob. 43PCh. 18 - Prob. 44PCh. 18 - Prob. 45PCh. 18 - Prob. 46PCh. 18 - Prob. 47PCh. 18 - Prob. 49PCh. 18 - Prob. 51PCh. 18 - Prob. 52PCh. 18 - Prob. 53PCh. 18 - Prob. 54PCh. 18 - Prob. 55PCh. 18 - Prob. 56PCh. 18 - Prob. 57PCh. 18 - Prob. 58PCh. 18 - Prob. 59PCh. 18 - Prob. 60PCh. 18 - Prob. 61PCh. 18 - Prob. 62PCh. 18 - Prob. 63PCh. 18 - Prob. 64PCh. 18 - Prob. 65PCh. 18 - Prob. 66PCh. 18 - Given a signal g(t) = sinc(200 t), find the...Ch. 18 - Prob. 68CPCh. 18 - Prob. 69CP
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- FM modulator is used to transmit a cosine message signal with 4V amplitude and 20Hz frequency. The carrier is a cosine signal with an amplitude of 10V and a frequency of 2000Hz. What is the power of the FM modulated signal?arrow_forwardFM modulator is used to transmit a cosine message signal with 4V amplitude and 20Hz frequency. The carrier is a cosine signal with an amplitude of 10V and a frequency of 2000Hz. What is the strength of the FM modulated signal?arrow_forwarddiscuss how the information signal is recovered from an FM signal using slope detectorarrow_forward
- The rate of change of the carrier frequency in an FM signal is determined by the a. carrier frequency b. modulating frequency c. carrier voltage d. modulating voltagearrow_forward2-Most of the power in an AM signal is in the a. Carrier b. Upper sideband c. Lower sideband d. Modulating signalarrow_forward1. The Voltage spectrum of FM signal is shown in Figure 1. The maximum amplitude of modulating signal is 5V. Calculate the bandwidth , modulation index ,Carrier frequency, modulating frequency and specify the type of Modulator(narrow band or wide band). 1.54 4.06 4.06 2.45 2.45 0.91 0.91 0.21 0.21 192 194 196 198 200 202 204 206 208 KHzarrow_forward
- An AM signal as shown below. The carrier frequency is 600 Hz, and the modulating signal is a single-tone sinusoidal signal. The x-axis is in time while the y-axis is the amplitude of the AM signal. Answer the following questions with appropriate solution if applicable. Determine the type of AM signal in the figure. Determine the frequency of the message signal in Hz. If the peak voltage level of the modulating signal and carrier are 1V and 2V respectively, determine the modulating index. Determine the power of the unmodulated carrier in W. Assume the load resistance to be 1-ohm. Determine the power of sidebands in W. Determine the total power of the AM signal in W.arrow_forwardPlease explain why the waveform of information and carriers signal is different from the receiver signal. 1st waveform: Carrier signal (2Vpk,20kHz) 2nd waveform: Information signal (1Vpk,1kHz) 3rd waveform: Receiver signalarrow_forward1 - For a signal with a period of 20 ms, calculate the corresponding signal frequency. 2 - A signal travels from point A to point B. At point A, the signal power is 90 W. At point B, the signal power becomes 45 W. Compute the attenuation in decibels?arrow_forward
- Twelve (12) signals each band-limited to 5 kHz are to be transmitted over a single channel by frequency division multiplexing. If AM-SSNB modulation guard band of 1 kHz I used, determine the bandwidth of the multiplexed signal.arrow_forwardWhat are the similarities and differences between the information signal m (t) obtained as a result of demodulation and the original information signal m (t) on the modulation side? (the demodulated signal is irregular one)arrow_forwardD. Modi 39 In linear madulation. the intelligent signal in conveyed in A. The amplitude of the transmitled signal BA The sideband compenents of the transmitted wave C. The phase deviation modulated signal D. None of the above 40 What communication technique or modulation scheme make use of channel noise a an added advantage? A. Asynchnous shift key modulation B Vestigial sidehand modulation C Spread spectrum DA Widehand Frequency modulation Narowbund FM and AM share a lot ef similarities encept that AThe lower side frequencies ae 80 out of phase B. The upper side frequencies are 180 out of phase C. The sidehand fequencies are IH0 out of phase. D None of the sbove 41arrow_forward
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