The cockpit and equipment racks of modern aircraft, large and small, are becoming filled with ever more sophisticated systems. This book attempts to describe a certain class of such systems, namely those which rely for their operation on electromagnetic radiation. The subject matter is complex and wide-ranging, hence not all aspects can be covered in one volume. In deciding where the treatment should be light or perhaps non-existent, I have asked myself two questions: (1) which aspects can most usefully be covered in a book; and (2) at which group of people involved in aviation should a book covering such aspects be aimed? The answer to (1) must be `describe the theory`. One can, and indeed must, read or be told about how to operate the system; how to navigate using the systems; how to solder, crimp and change items; how to use test equipment, etc. but proficiency is impossible without practice. On the other hand gaining an understanding of how a particular system works is more of a mental exercise which can be guided in a book such as this. This is not to say that more practical matters are neglected, since it would not help one`s understanding of the theory of operation not to see, at least in words and pictures, how a particular system is controlled, presents its information, reacts to the environment, etc. Having decided the main line of attack the more difficult question of depth of treatment must be answered; in other words which group should be satisfied? Pilots need a superficial knowledge of how all the systems work; maintenance engineers on the ramp and in the hangar a more detailed knowledge; workshop engineers must have an understanding of the circuitry for perhaps a limited range of equipments; while designers should have the greatest depth of knowledge of all. It is virtually impossible to draw dividing lines, but it is hoped that if enough theory is given to satisfy the aircraft radio maintenance engineer then the book might be useful to all groups mentioned. The depth of treatment varies, it being impossible to cover everything, or indeed anything, to the depth 1 would have liked. In particular few details of circuitry are given since I feel most readers will be more interested in the operation of the system as a whole. Nevertheless, some circuits are given purely as examples. Should the reader need circuit knowledge, the equipment maintenance manual is the best place to find it, assuming he knows the system and he has a basic knowledge of electronics. The state of the art of the equipment described is also varied. I did not see the point of describing only equipment containing microprocessors, since the vast majority of systems in service do not use them as yet. On the other hand if the life of this book is not to be too severely restricted, the latest techniques must be described. Within the pages that follow, analogue, analogue/digital, hardwired digital and programmable digital equipments all find a place. As stated previously, the book is aimed primarily at the maintenance engineer. However, I hope several groups might be interested. This poses problems concerning the background knowledge required. For what I hope is a fairly substantial part of the book, any reasonably intelligent technically minded person with a basic knowledge of mathematics and a familiarity with aircraft will have no difficulty that two or perhaps three readings will not overcome. There are parts, however, where some knowledge of electronics, radio theory or more sophisticated mathematics is needed. In three chapters where the going gets a bit tough, I have relegated the offending material to an appendix. Some background material is covered in Chapter 1, in particular, basic radio theory and a discussion of digital systems in so far as coding and computers are concerned. Printed Pages: 264. Buchnummer des Verkäufers 91603
Titel: Aircraft Radio Systems (EA-356)
Verlag: Sterling Book House/Shroff Publishers & Distributors Pvt. Ltd.
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