Electronic Communications System By Wayne Tomasi
CHAPTER 1
# 1)
INTRODUCTION TO ELECTRONIC COMMUNICATIONS
DEFINITIONS Its fundamental purpose is to transfer information from one place to another.
TERMS Electronic Communication System
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The transmission, reception, and processing of information between two or more locations using electronic circuits.
Electronic Communication
Electronic Communications Time Line 1830: 1837: 1843: 1861: 1864: American Scientist and professor Joseph Henry transmitted the first practical electrical signal. Samuel Finley Breese Morse invented the telegraph. Alexander Bain invented the facsimile. Johann Phillip Reis completed the first nonworking telephone. James Clerk Maxwell released his paper “Dynamic Theory of the Electromagnetic Field”, which concluded that light electricity, and magnetism were related. Dr. Mahlon Loomis became the first person to communicate wireless through the Earth’s atmosphere. First transatlantic telegraph cable was installed. Alexander Graham Bell and Thomas Watson Invented the telephone. Thomas Alva Edison invents the phonograph. Heinrich Hertz discovers electromagnetic waves. Heinrich Hertz discovers radio waves. Marchese Guglielmo Marconi demonstrates wireless radio wave propagation.
3)
1865: 1866: 1876: 1877: 1880: 1887:
Prepared By : Raniel P. Babon
1
BOOK REVIEW IN COMMUNICATIONS
Electronic Communications System By Wayne Tomasi
1888:
Heinrich Hertz detects and produces radio waves. Heinrich Hertz conclusively proved Maxwell’s prediction that electricity can travel in waves through the Earth’s atmosphere. Marchese Guglielmo Marconi builds his first radio equipment, a device that rings a bell from 30 ft. away. Marchese Guglielmo Marconi discovered ground wave propagation. Marchese Guglielmo Marconi established the first radio link between England and France. American Scientist Reginald A. Fessenden the world’s first radio