zain IQAM Modulatio...->AM Modulation1. What is the main feature in AM modulation, that is used tojudge if the modulation is good or not? Explain withexamples.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 signalm(t) = 10 sin(10nt) and a carrier signalc(t) = 15cos(1000t). Calculate the modulation index (u). Is it a goodmodulation? If no, suggest a change in one of the signalsabove and calculate u again, so that it approaches ideal case.5. Draw the modulation block diagram of AM....

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Engineering

Electrical Engineering

5. Draw the modulation block diagram of AM.

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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Given a low level AM modulator with a modulation index of m=0.8 a quiescent voltage gain A=100 an input carrier frequency fc=500Khz with an amplitude Vc=5mV and a 1000 Hz modulating signal. determine:a. Maximum and minimum voltage gainsb. Maximum and minimum amplitudes for Voutc. Sketch the AM output envelope.
Given a low level AM modulator with a modulation index of m=0.8 a quiescent voltage gain A=100 an input carrier frequency fc=500Khz with an amplitude Vc=5mV and a 1000Hz modulating signal determine: a. Maximum and minimum voltage gains b. Maximum and minimum amplitudes for Vout
Q4: An AM signal: XAM(1)-100cos(100z*10³ t) + 60cos(47*10') *cos(100 * 10³ t). 1) Calculate frequency bandwidth B for XAM(t) signal. 2) Modulation index m%. '
Q2The modulating x(t)=2cos2000nt+cos4000nt is applied to AM modulator of carrier=2cos106 t. Write expression for modulation equation and Sketch the spectral of modulator output (Single Side Bandspectrum)
4. A modulated signal (AM) varies between the maximum values of +18V and -18V, if the carrier has an amplitude of 12V, a) What is the modulation index? b) What is the maximum magnitude of the modulator? c) Sketch the envelope of the modulated wave
ANSWER THE PROBLEM MAKE SURE THAT IT IS IN 4 DECIMAL PLACES: Solve for the side frequency volt, modulation depth is lessened by 25% of an AM transistor with 32V output voltage when modulated to a depth of 96%.
5-If the FM modulating signal is 300 kHz, and the carrier swing is 300 kHz. Therefore, the value and the type of the modulation index are, a) 0.5 NBFM b) 0.5 WBFM c) 1 NBFM d) 1 WBFM 6- IF the modulation index of FM signal is 2, the number of significant sidebands which greater than 1% of unmodulated carrier is? (Follow the table in the last page) a) 4 sidebands b) 6 sidebands c) 8 sidebands d) 10 sidebands 7- Let the carrier given 10cos(2nd) and the message signal be 5cos(10mt). Assume the message is used to frequency modulate the carrier with ky-10, the modulation index is, a) 1 b) 5 c) 10 d) 15
For single sideband (SSB) modulation d) Explain with drawing the demodulation process of SSB signal.e) How many single sideband (SSB) stations can be accommodated in a 180 KHz bandwidth if the highest modulating signal frequency fmax is 9 KHz?f) What are the main advantages and disadvantages of single sideband (SSB) modulation compared with ordinary amplitude modulation (AM).
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If the amplitude of the modulation signal voltage was given to be -4v and +4v and carrier amplitude also given to be -22v and +22v, by suitable waveform diagram determine the Am modulated output. Remember to provide all necessary wave forms in practical terms.
C- Put TRUE or FALSE for only TWO of the following and say why: 1. PCM modulation is very complex technique compared to DM. 2. Envelope detection for PSK signal is possible via using DPSK. 3. A frequency reuse factor can be reached to "1" as a maximum value.