Telecommunication deals with conveying information with electrical signals. This chapter prepares the telecommunication novice with some very basic elements of telecommunications. We are concerned about the transport and delivery of information. The first step introduces the reader to early signaling techniques prior to the middle of the nineteenth century when Samuel Morse opened the first electrical communication circuit in 1843.
The next step is to present some of the basic concepts of electricity; this is mandatory for an understanding of how telecommunications works from a technical perspective. For an introduction to electricity, the user should consult Appendix A. After completion of this chapter, the reader of this text should have a grasp of electrical communications and its units of measure. Specifically, we will introduce an electrical signal and how it can carry intelligence. We will differentiate analog and digital transmission with a very first approximation.
Binary digital transmission will then be introduced starting with binary numbers and how they can be represented electrically in a simple fashion. We then delve into conducted transmission. That is the transport of an electrical signal on a copper-wire pair, on coaxial cable, and then by light in a fiber-optic strand of glass. Radio transmission and the concept of modulation will then be introduced.
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