Lab 17 Amplitude shift keying hi, I did experiments# 15,16, and 17. I only want you to write the objectives of the labs, answers the questions , and write

Lab 17 Amplitude shift keying hi, I did experiments# 15,16, and 17. I only want you to write the objectives of the labs, answers the questions , and write conclusion. thanks Figure 16
17
22
PART B
Figure 25
Figure 32
PART C
47
PART D
53
Bandwidth limiting and restoring digital signals
Experiment 16
DIGITAL COMMUNICATION SYSTEMS LABORATORY
DR. COTAE
FEBRUARY 2019
INTRODUCTION:
EXPERIMENT:
The first image diplays the PCM decoder module’s output as well as the PCM encoder input.
‘CH0’ represents the input, and ‘CH1’ the output at 20Hz frequency.
Figure 1: PCM input and output
Question 1: What’s causing the errors on the PCM decoder module’s output?
Question 2: If this were a communications system transmitting speech, what would these
errors sound like when the message is reconstructed?
Distorted output
Q3
Q4
Singal analyzer output with a reduced channel bandwidth
Part b
Q5
Cut off frequency low = more distortion
Q6
Partc c
Restoring digital signal
Q7
Q8
Q9
Q10
Q11
CONCLUSION: This was an essential experiment because it provided the opportunity to
visualize pulse code modulation decoding process, applying the learned knowledge in the
lectures to effectively solve each necessary step until the full message reconstruction.
12
13
Part B
19
PART C
22
Emona DATEx
Lab Manual
Volume 1
Experiments in Modern Analog &
Digital Telecommunications
For NI™ ELVIS II
Barry Duncan
.
Emona DATEx
Lab Manual
Volume 1
Experiments in Modern Analog &
Digital Telecommunications
For NI™ ELVIS II
Barry Duncan
Emona DATEx Lab Manual for NI™ ELVIS II
Volume 1 Experiments in Modern Analog and Digital Telecommunications.
Author: Barry Duncan
Technical editors: Tim Hooper & Carlo Manfredini
Issue Number: 3.1
Published by:
Emona Instruments Pty Ltd,
78 Parramatta Road
Camperdown NSW 2050
AUSTRALIA.
web: www.emona-tims.com
telephone: +61-2-9519-3933
fax: +61-2-9550-1378
Copyright © 2007 – 2011 Emona Instruments Pty Ltd and its related entities.
All rights reserved. No part of this publication may be reproduced, translated,
adapted, modified, edited or distributed in any form or by any means, including
any network or Web distribution or broadcast for distance learning, or stored
in any database or in any network retrieval system, without the prior written
consent of Emona Instruments Pty Ltd.
For licensing information, please contact Emona Instruments Pty Ltd.
DATEx™ is a trademark of Emona TIMS Pty Ltd.
LabVIEW™, National Instruments™, NI™, NI ELVIS™, and NI-DAQ™ are
trademarks of National Instruments Corporation. Product and company names
mentioned herein are trademarks or trade names of their respective
companies.
Printed in Australia
Contents
Introduction ……………………………………………………………………………………………..i – iv
How to install and power up DATEx™ for NI ELVIS II/+ ……………. v
How to install and power up DATEx™ for NI ELVIS I …………………. vii
ESD Warning, Unpacking, Handling, Set-up and
ESD Preventative Measures…………………………………………………….. ix
1 – An introduction to the NI ELVIS II test equipment………………………… Expt 1 – 1
2 – An introduction to the DATEx experimental add-in module……………. Expt 2 – 1
3 – An introduction to soft front panel control ………………………………………. Expt 3 – 1
4 – Using the Emona DATEx to model equations……………………………………… Expt 4 – 1
5 – Amplitude modulation (AM)………………………………………………………………….. Expt 5 – 1
6 – Double Sideband (DSBSC) modulation………………………………………………… Expt 6 – 1
7 – Observations of AM and DSBSC signals in the frequency domain ….. Expt 7 – 1
8 – AM demodulation…………………………………………………………………………………… Expt 8 – 1
9 – Double Sideband DSBSC demodulation ………………………………………………. Expt 9 – 1
10 – Single Sideband (SSB) modulation & demodulation…………………………. Expt 10 – 1
11 – Frequency Modulation (FM) ………………………………………………………………… Expt 11 – 1
12 – FM demodulation………………………………………………………………………………….. Expt 12 – 1
13 – Sampling & reconstruction …………………………………………………………………. Expt 13 – 1
14 – PCM encoding ……………………………………………………………………………………….. Expt 14 – 1
15 – PCM decoding ……………………………………………………………………………………….. Expt 15 – 1
16 – Bandwidth limiting and restoring digital signals………………………………. Expt 16 – 1
17 – Amplitude Shift Keying (ASK) …………………………………………………………… Expt 17 – 1
18 – Frequency Shift Keying (FSK)……………………………………………………………. Expt 18 – 1
19 – Binary Phase Shift Keying (BPSK)……………………………………………………… Expt 19 – 1
20 – Quadrature Phase Shift Keying (QPSK) ………………………………………….. Expt 20 – 1
21 – Spread Spectrum – DSSS modulation & demodulation …………………… Expt 21 – 1
22 – Undersampling in Software Defined Radio………………………………………. Expt 22 – 1
Electrostatic Discharge Sensitive Product
CAUTION: The inputs/outputs of this product can be damaged if subjected to
Electrostatic Discharge (ESD).
To prevent damage, industry-standard ESD prevention measures must be
employed during installation, maintenance, and operation.
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