Roddy / Hiller Radio and Line Transmission

Electrical Engineering Division, Volume 1
1. Auflage 2013
ISBN: 978-1-4831-3717-9
Verlag: Elsevier Science & Techn.
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 262 Seiten, Web PDF

Radio and Line Transmission, Volume 1 provides an introduction to the basic principles of radio and line transmission. This book serves as a guide for technicians in the electrical engineering industry. Organized into 14 chapters, this volume starts with an overview of the definition of wave motion, which is a significant concept in the study of communications methods. This text then explains decibel as the most convenient practical unit based on logarithms. Other chapters consider the frequency ranges for speech and music. This book describes as well the harmonic composition of sound waves and the frequency analysis of speech. The final chapter presents the fundamental feature of all telegraph systems, which is the use of codes such as the Morse code, cable code, and the five-unit even-length code. This book is a valuable resource for electrical technicians engaged in radio communications. Senior technicians on national certificate courses will also find this book extremely useful.

Dermot Roddy is the Science City Professor of Energy and Director of the Sir Joseph Swan Institute at Newcastle University, UK. He was previously responsible for the development of a renewable energy and alternative fuel programme for Renew Tees Valley Ltd, UK, and he is noted for his research in optimisation and control.

Autoren/Hrsg.

Roddy, Dermot

Hiller, N.

Inhaltsverzeichnis

1;Front Cover;1
2;Radio and Line Transmission;4
3;Copyright Page;5
4;Table of Contents;6
5;FOREWORD;10
6;AUTHOR'S PREFACE;12
7;CHAPTER 1.
WAVES;14
7.1;1.1. Introduction;14
7.2;1.2. Wave motion;14
7.3;1.3. Important definitions;16
7.4;1.4. Relationship between wavelength, frequency, and velocity of propagation;18
7.5;1.5. Equations for a sine wave;18
7.6;1.6. Sound waves;21
7.7;1.7. Electromagnetic waves;23
7.8;1.8. Polarization;24
7.9;1.9. Electromagnetic transmission of sound;24
7.10;1.10. Exercises;25
8;CHAPTER 2.
LOGARITHMIC UNITS;27
8.1;2.1. Introduction;27
8.2;2.2. The bel and the decibel;28
8.3;2.3. Power gain and loss in decibels;30
8.4;2.4. Voltage and current ratios in decibels;33
8.5;2.5. Relative gains;35
8.6;2.6. Absolute values in decibels;36
8.7;2.7. Decibel range;36
8.8;2.8. Worked example;37
8.9;2.9. Exercises;40
9;CHAPTER 3. SPEECH AND MUSIC;41
9.1;3.1. Introduction;41
9.2;3.2. Speech signals;41
9.3;3.3. Frequency analysis of speech;42
9.4;3.4. Frequency range required for music;46
9.5;3.5. Exercises;46
10;CHAPTER 4.
AMPLITUDE MODULATION;47
10.1;4.1. Introduction;47
10.2;4.2. Amplitude modulation;47
10.3;4.3. Frequencies in a modulated wave;50
10.4;4.4. Carrier modulated with speech or music;51
10.5;4.5. Modulation index and modulation depth;53
10.6;4.6. Worked examples;55
10.7;4.7. Exercises;57
11;CHAPTER 5.
PASSIVE COMPONENTS;59
11.1;5.1. Introduction;59
11.2;5.2. Resistance;60
11.3;5.3. Construction of resistor;61
11.4;5.4. Capacitance;65
11.5;5.5. Construction of capacitors;67
11.6;5.6. Inductance;70
11.7;5.7. Construction of inductors;72
11.8;5.8. Mutual inductance and transformers;75
11.9;5.9. Exercises;78
12;CHAPTER 6. SERIES AND PARALLEL TUNED CIRCUITS;80
12.1;6.1. Introduction;80
12.2;6.2. Series tuned circuit (series resonance);80
12.3;6.3. Parallel tuned circuit (parallel resonance);83
12.4;6.4. 3-dB bandwidth;86
12.5;6.5. Worked example;88
12.6;6.6. Exercises;89
13;CHAPTER 7. ELECTRO-ACOUSTIC DEVICES;90
13.1;7.1. Introduction;90
13.2;7.2. Microphones;90
13.3;7.3. Frequency response of microphones;98
13.4;7.4. Polar response of microphones;100
13.5;7.5. Telephone receivers;102
13.6;7.6. Frequency response and power of telephone receivers;104
13.7;7.7. The moving-coil loud-speaker;106
13.8;7.8. Frequency response and power of the moving-coil speaker;108
13.9;7.9. Exercises;109
14;CHAPTER 8. SEMICONDUCTOR AND THERMIONIC DEVICES;111
14.1;8.1. Introduction;111
14.2;8.2. n and p materials;111
14.3;8.3. The p-n junction;115
14.4;8.4. Practical junction rectifiers and diodes;117
14.5;8.5. The junction transistor;120
14.6;8.6. Static characteristic curves of a transistor;123
14.7;8.7. Collector leakage current;129
14.8;8.8. Simple equivalent circuit for a transistor;130
14.9;8.9. Limitations of the simple equivalent circuits;134
14.10;8.10. High vacuum thermionic valves (vacuum tubes);134
14.11;8.11. The diode;137
14.12;8.12. The triode;139
14.13;8.13. Static characteristic curves of a triode;140
14.14;8.14. The voltage amplification factor;142
14.15;8.15. The tetrode;143
14.16;8.16. The pentode;146
14.17;8.17. The variable-µ pentode;151
14.18;8.18. Simple valve equivalent circuits;152
14.19;8.19. Limitations of the equivalent circuits;154
14.20;8.20. Worked examples;154
14.21;8.21. Exercises;157
15;CHAPTER 9. RECTIFIER AND DEMODULATOR (DETECTOR) CIRCUITS;160
15.1;9.1. Introduction;160
15.2;9.2. Power-supply circuits;160
15.3;9.3. Demodulator (or detector) circuits;166
15.4;9.4. Exercises;171
16;CHAPTER 10. AMPLIFIERS;173
16.1;10.1. Introduction;173
16.2;10.2. Transistor amplifier circuits;173
16.3;10.3. D.c. stabilization;179
16.4;10.4. Frequency response;180
16.5;10.5. Valve amplifiers;181
16.6;10.6. Automatic (cathode) bias;186
16.7;10.7. Effect of input resistance R1;187
16.8;10.8. Frequency response;189
16.9;10.9. The load line;190
16.10;10.10. Dynamic characteristics;195
16.11;10.11. Tuned amplifiers;196
16.12;10.12. Worked examples;203
16.13;10.13. Exercises;204
17;CHAPTER 11. TUNED CIRCUIT OSCILLATORS;205
17.1;11.1. Introduction;205
17.2;11.2. The tuned-anode-tuned-grid oscillator;206
17.3;11.3. The tuned-anode oscillator;208
17.4;11.4. Tuned-grid oscillator;208
17.5;11.5. The Colpitts valve oscillator;208
17.6;11.6. The Hartley valve oscillator;210
17.7;11.7. The Colpitts transistor oscillator;211
17.8;11.8. The Hartley transistor oscillator;212
17.9;11.9. Exercises;212
18;CHAPTER 12.
RADIO SYSTEMS;213
18.1;12.1. Introduction;213
18.2;12.2 Sound broadcasting;213
18.3;12.3. Television broadcasting;217
18.4;12.4. Standard frequency broadcasts;219
18.5;12.5. Point-to-point radio services;220
18.6;12.6. Fixed to mobile radio services;224
18.7;12.7. Worked examples;225
18.8;12.8. Exercises;227
19;CHAPTER 13.
LINE TELEPHONY;229
19.1;13.1. Introduction;229
19.2;13.2 Telephony circuits;229
19.3;13.3. Transmission bridges;234
19.4;13.4. Sidetone;237
19.5;13.5. Terminating units and repeaters;238
19.6;13.6. Two- and four-wire terminations;239
19.7;13.7. Exercises;242
20;CHAPTER 14.
LINE TELEGRAPHY;243
20.1;14.1. Introduction;243
20.2;14.2. Codes;244
20.3;14.3. Telegraph speed;250
20.4;14.4. Relationship between telegraph speed and bandwidth;251
20.5;14.5. Basic telegraph circuits;253
20.6;14.6. Exercises;257
21;ANSWERS TO EXERCISES;258
22;INDEX;260