Measurement Of Pulse Distribution In Digital Information Transmission | K. A. Brusillovskii

This book, which should be regarded as an introduction to the extensive field of digital data transm ission quality m easurem ents, is intended to partially fill this gap. It deals with a selection of topics pertaining, first,

to some statistical features of distortion and error distributions in commu­ nication channels (mainly wires) and, second, to the design of appropriate

m easuring instrum ents and their components. It is an outgrowth of the original research in which I and my co-w orkers have been engaged since 1958.

The book is divided into seven chapters. The first three chapters briefly discuss the criteria for the evaluation of noiseproof features of communication channels and the elements of the statistical theory of signals, noises, distortions, and errors in digital data transmission. Some statistical error models encountered in the analysis of transmission over telephone lines are considered.

Chapter Four deals with the fundamental properties of test signals and the functional principles of test signal generators.

Chapters Five and Six discuss analog and digital distortion meters

and various error and distortion distribution analyzers. Because of space lim itations, only those instrum ents are described which have been developed under my direction or with my active participation. Analyzers constitute an exception to this rule, because of their great significance

as the m easuring instrum ent of the future in digital data transm ission.

In distinction from the conventional testing equipment, the instruments described in this book are all built on the contemporary principle of noncontact solid-state switching elem ents, using sem iconductor triodes (transistors) and ferrites.

In the concluding chapter various questions related to the optimum

design of a digital indicator register and a transistorized output relay are discussed. Again because of space limitations we had to omit descriptions of other component elem ents, discussion of the telegraph distortion term ino- logy, instrumental errors, methods of reduction of experimental findings, and an analysis of the actual results obtained with the various testers described in the book. These topics, as well as descriptions of other similar instruments are covered by the references listed at the end of the book.