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Now, in a relatively short time span, a new concept of signals delivery has become available - one that is not only capable of carrying all previous services, but also provides the means of distributing many new services, some that could not be supported by previous terrestrial means. Until the introduction of satellites, communications by electrical and electronic means developed in a progressive and evolutionary m a n n e r. Some of these proposals look like changing the concept of personal communications so completely, that saying O p e n Channel 9' to a pocket pen may n o longer be science fiction. In preparing this second edition, the opportunity has b e e n taken not only to bring the previous work u p to d a t e, but also to extend it into the realms of some of the services that might be introduced before the end of the 1990s. In spite of this development, discrete c o m p o n e n t circuits have been retained in a n u m b e r of cases, because it is felt that with these it is easier to explain the principles involved. Many of the established systems have now a d o p t e d Application Specific Integrated Circuit (ASIC) technology, with the advantages of improved reliability and reduced system size and cost, leading to a greater popularity. N o w in the early 1990s, trans-Atlantic telephone calls are equally likely to be routed via satellite or submarine cable. Title 621.3825 I0437 9 Printed and bound in Great Britainĭuring the space of three short years since the first edition was completed, satellite systems alongside optical fibres, appear to have b e c o m e the catalysts that were n e e d e d to speed up the integration process of global communications services. Communication Services Via Satellite: Handbook for Design, Installation and Service Engineers.
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Applications for the copyright holder's written permission to reproduce any part of this publication should be addressed to the publishers British Library Cataloguing in Publication Data Lewis, Geoffrey E. No part of this publication may be reproduced in any material form (including photocopying or storing in any medium by electronic means and whether or not transiently or incidentally to some other use of this publication) without the written permission of the copyright holder except in accordance with the provisions of the Copyright, Designs and Patents Act 1988 or under the terms of a licence issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London, England W1P 9HE.
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This second edition is dedicated to the memory of Derek Henry in recognition of his encouragement and long friendship.Ĭommunication Services via Satellite A Handbook for Design, Installation and Service Engineers Second editionīutterworth-Heinemann Ltd Linacre House, Jordan Hill, Oxford OX2 8DP PART OF REED INTERNATIONAL BOOKS OXFORDįirst edition published by BSP Professional Books Ltd 1988 Second edition published by Butterworth-Heinemann Ltd 1992 © Geoffrey E.