H.W Two low pass signals, each band limited 4KHZ, are to be time multiplexed into a single channel using PAM. Each signal is impulse sampled at a rate 10KHZ. The time multiplexed signal waveform is filtered by an ideal LPF before transmission. (a) What is minimum clock frequency of the system? (b) What is the minimum cut off frequency of the LPF? (c) In the receiver side, determine the minimum and maximum acceptable bandwidth of the LPF used in retrieving the analog signal? Ans. (a) 20KHZ (b) 10KHZ (c) 4KHZ, 6KHZ.

H.W Two low pass signals, each band limited 4KHZ, are to be time multiplexed into a single channel using PAM. Each signal is impulse sampled at a rate 10KHZ. The time multiplexed signal waveform is filtered by an ideal LPF before transmission. (a) What is minimum clock frequency of the system? (b) What is the minimum cut off frequency of the LPF? (c) In the receiver side, determine the minimum and maximum acceptable bandwidth of the LPF used in retrieving the analog signal? Ans. (a) 20KHZ (b) 10KHZ (c) 4KHZ, 6KHZ.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

Amplitude modulation

A radio signal can carry information in the form of sound or image for broadcasting or communication. For it to be sent to a greater distance, the signal must be changed or modulated in some way. One of the easiest way is to change the amplitude of the signal with variations of the video or the audio signal. This is called Amplitude Modulaton. In this modulation information of message is carried in amplitude of carrier signal.

Question

(4) For AM
min .BW.=2(fm+fm2)= 2(8+10) 36KH:
For SSB
min .BW. fm+ fm2 8+10 18KH:
H.W
Two low pass signals, each band limited 4KHZ, are to be time
multiplexed into a single channel using PAM. Each signal is impulse
sampled at a rate 10KHZ. The time multiplexed signal waveform is
filtered by an ideal LPF before transmission.
(a) What is minimum clock frequency of the system?
(b) What is the minimum cut off frequency of the LPF?
(c) In the receiver side, determine the minimum and maximum
acceptable bandwidth of the LPF used in retrieving the analog
signal?
Ans. (a) 20KHZ (b) 1OKHZ (c) 4KHZ, 6KHZ.

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