Section Design an FDM multiplexer for the transmission of volce signals mi(t), m:(t) and mi(t) at carrier frequencies 200 kHz, 215 kHz and 220 kHz respectively. Upload answer sheets SN V, BLF VOUT 0-3kHz cos @o! I Soy is the FDM input to the receiver, with a local oscillator signal cos arot set to 215 kHz, find the output of the mixer

Section Design an FDM multiplexer for the transmission of volce signals mi(t), m:(t) and mi(t) at carrier frequencies 200 kHz, 215 kHz and 220 kHz respectively. Upload answer sheets SN V, BLF VOUT 0-3kHz cos @o! I Soy is the FDM input to the receiver, with a local oscillator signal cos arot set to 215 kHz, find the output of the mixer

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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Q2. An FM transmitter is modulated with a single tone 13cos (2(pi)28041t) and a carrier amplitude of 55 volt. The output resistive load for no modulation is 114N and the modulation constant k, = 14624Hz / volt. For the given parameters, determine the following: 1- The average power in all sidebands. 2- The carrier power if the amplitude of modulating signal is reduced by 5 volts.
2-What is the maximum allowed frequency of the input information signal (modulator) in an AM system (DSB-LC) which has a bandwidth of 40kHz and a carrier frequency of 500kHz
6. It is difficult to use the simple AGC system available on the ANACOM 1/2 board withan SSB transmission because:a the AGC circuit requires both sidebands to be present to control the receiver gain.b the AGC system requires the incoming signal to contain a carrier component.c the frequency is too high and the AGC system cannot make the receiver gain respond fastenough.d the BFO produces a constant level of output signal.
A carrier signal given by 10 cos 10000 nt volt is AM/DSB-LC modulated by single-tone signal 4 cos 100 nt volt. 1- Calculate the modulation index. 2- Sketch the spectrum of the modulated signal. 3- Calculate transmission bandwidth.
Q2. An FM transmitter is modulated with a single tone A, cos (2nA2t) and a carrier amplitude of A, volt. The output resistive load for no modulation is A, N and the modulation constant k, = A5 Hz / volt. For the given parameters, determine the following: 1- The average power in all sidebands. 2- The carrier power if the amplitude of modulating signal is reduced by 5 volts.
4/ Consider the following types of signals and determine how many of each of them could Assign within a 6 MHz bandwidth channel using FDMA: A/ music with a frequency band-base of 15khz, using frequency modulation With a frequency deviation of 75 kHz B/ A bits sequence at a speed of 64 kbps, using 16-PSK modulation and a channel without noise
[Q2] Answer the following: (a) Explain the effect of the value of μ)(modltion index ) on the modulation quality of AM-DSB-LC . (b) Explain the frequency conversion of the carrier.
With the aid of diagrams, show and explain how phase locking is used to demodulate a frequency-modulated (FM) signal.
Derive the effect of phase and frequency errors between the local oscillator signal and the received SSB carrier signal in the synchronous SSB detector.
Message sign; m (t) = 10sinc (400 * t), and carrier sign; c (t) = 100cos (2 * pi * f * t) modulates by phase modulation. Modulation index 6, message bandwidth W = 200 Hz. • Obtain the mathematical expression of the phase modulated sign, u (t). • What is the maximum phase deviation of the modulated signal? • What is the strength of the modulated signal?
Explain the relative merits of high- and low-level modulation schemes. Please DO NOT copy from the book. Write the explanation by yourself.
41. Noise is typically narrow spikes of voltage with high frequencies.Group of answer choices True False 42. SCA signal can be transmitted at 67-kHz subcarrier.Group of answer choices True False 43. In FM, as the modulating signal amplitude increases, carrier frequency also increases proportionately.Group of answer choices True False 44. The greater the amplitude of the modulating signal, the higher the frequency deviation rate.Group of answer choices True False 45. With no modulation, the carrier frequency will shift above or below its normal frequency.Group of answer choices True False 46. The higher the frequency of the modulating signal, the greater the frequency deviation of the carrier signal.Group of answer choices True False