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INTERNATIONAL TELECOMMUNICATIONS: DYNAMICS of REGULATION of a RAPIDLY EXPANDING SERVICE Asimr H
INTERNATIONAL TELECOMMUNICATIONS: DYNAMICS OF REGULATION OF A RAPIDLY EXPANDING SERVICE AsImR H. ENDE* I A PROFILE OF THE REGULATORY ISSION The Communications Act of 1934, as amended' (the Communications Act), and the Communicatons Satellite Act of 19622 (the Satellite Act) provide for pervasive and all-encompassing federal regulation of international telecommunications. The basic purposes to be achieved by such regulation are declared to be "to make avail- able, so far as possible, to all the people of the United States a rapid, efficient, Nation-wide, and world-wide wire and radio communications service with adequate facilities at reasonable charges, ...." This broad and general statement of purposes is supplemented by the Declaration of Policy and Purposes in the Satellite Act. In that act, Congress declared it to be the policy of the United States to establish,-in conjunction and cooperation with other countries and as expeditiously as practicable, a commercial communications satellite system which, as part of an improved global communications network, would be responsive to public needs and national objectives, would serve the communications needs of this country and other countries, and would contribute to world peace and understanding In effectuating the above program, care and attention are to be directed toward providing services to economically less developed countries and areas as well as more highly developed ones, toward efficient and economical use of the frequency spectrum, and toward reflecting the benefits of the new technology in both the quality of the services provided and the charges for such services.4 United States participation in the global system is to be in the form of a private corporation subject to appropriate governmental regulation.5 All authorized users are to have nondiscriminatory access to the satellite system. -
Antique Radio Classified
ANTIQUE RADIO CLASSIFIED VOLUME 3 AUGUST 19E6 NUMBER 8 • QUAKER OATS CRYSTAL SET From the collection of Randall Renne - Dixon, IL THE NATIONAL PUBLICATION FOR BUYERS AND SELLERS OF OLD RADIOS AND RELATED ITEMS - PUBLISHED MONTHLY ANTIQUE RADIO CLASSIFIED Publishing Details Classified Ads Each subscriber is entitled to one 20 word classified ad Antique Radio Classified lUSPS 735-0901 is free of charge per issue. Additional words over the limit published monthly. 12 times yearly. at a suoscrip- are 10C per word. Multiple insertions of same ad are tion rate of $18.00 per year Second Class and discouraged. This is to allow for a varied ad content in each issue. Multiple insertion ads for more than $24.00 First Class mailing rates, by G.B.S. Enter- 2 issues must be run as a display ad. All ads must be prises, 9511 Sunrise Blvd.. 8.1-23. Cleveland, Ohio printed neatly and be received by the 8th of the month 44133. (216) 582-3094. before next issue. See classified ad details elsewhere Second-class postage paid at Cleveland, OH. in this issue. Publisher and Editor Gary B. Schneider. POSTMASTER: Send address changes to address Payment above. Copyright 1986... Antique Radio Classified All ads must be paid for in advance. Make checks payable to Antique Radio Classified. Purpose Antique Radio Classified is published for people in- Subscription Rate volved in the radio collecting hobby. Its purpose is to Subscriptions are available on a yearly basis. $18.00 stimulate growth of the hobby thru the buying, selling. per year Second Class and $24.00 First Class mailing and trading of radios and related items. -
National Register of Historic Places Registration Form
_______________________ _____________________________________ En’, IWJI ‘III ‘" 11fl4-XIIH Il,. S-ki United States Department of the Interior NatiQnai Park Service National Register of Historic Places Registration Form 1. Name of Property Instorir name Massje Wireless Station other n;uneAsite number ‘ ‘ Pt]-’ 2. bntion street & nuinber 1300 Frenchtown Road not for publication: citxtown: East Greenwich viciuit N/A state: RI toil ntv Ken Msle: 0 0 3 ZIp isle: 02 8 1 8 3. Classificafion Ownership of Pms’rty: Private Tategorv of Piopertv: Building Nu mnber of flesoiLrtes with] ii Property: - Ton t riInit ii ig No ii 0 nt rihuli ng htHldilgs sites structures objects 1 p Total Number of toiitnhimting res4imrees previously listed in time National Ihgister Name ol related immumltiple property listiuig N/A ___________________________________________________________________ ______________ _______________________________________________________________________________________________________________________ _________________________ USDIiNPS Yil[fl Registration Form Page 2 Property name Nassie Wireless Station, Kent Cty. , East Greenwich, RI 4. StatelFederal Agency Certification As the tlt’signated authority under time National ii istonc Preservation Act of 1986, as amnendeil, I hereby certify that this_x_ nonminatiomi request for tleternii nat ion of eligibility meets the documnemitation standards for registermg pmoiwiies in the Nationi I Register of ii istoric Places and meets the procedural amid professional requ irenien ts set forth in 36 CFI1 Pa.rt. 60. In mmiv opi mm ion, tIme property J nieets does not meet the National Register Cr term. - See continuation sheet. 1. ‘ Gc Signature of certifying official Date State or Feil era I agency a mid himmriLil En umy op i iii u m, the i11 pe rtv meets ltfl’s mot uieet tIme Nat immII legister t-ri te ii a. -
Radio Communications in the Digital Age
Radio Communications In the Digital Age Volume 1 HF TECHNOLOGY Edition 2 First Edition: September 1996 Second Edition: October 2005 © Harris Corporation 2005 All rights reserved Library of Congress Catalog Card Number: 96-94476 Harris Corporation, RF Communications Division Radio Communications in the Digital Age Volume One: HF Technology, Edition 2 Printed in USA © 10/05 R.O. 10K B1006A All Harris RF Communications products and systems included herein are registered trademarks of the Harris Corporation. TABLE OF CONTENTS INTRODUCTION...............................................................................1 CHAPTER 1 PRINCIPLES OF RADIO COMMUNICATIONS .....................................6 CHAPTER 2 THE IONOSPHERE AND HF RADIO PROPAGATION..........................16 CHAPTER 3 ELEMENTS IN AN HF RADIO ..........................................................24 CHAPTER 4 NOISE AND INTERFERENCE............................................................36 CHAPTER 5 HF MODEMS .................................................................................40 CHAPTER 6 AUTOMATIC LINK ESTABLISHMENT (ALE) TECHNOLOGY...............48 CHAPTER 7 DIGITAL VOICE ..............................................................................55 CHAPTER 8 DATA SYSTEMS .............................................................................59 CHAPTER 9 SECURING COMMUNICATIONS.....................................................71 CHAPTER 10 FUTURE DIRECTIONS .....................................................................77 APPENDIX A STANDARDS -
Communications Under the Seas: the Evolving Cable Network and Its
Communications under the Seas The Evolving Cable Network and Its Implications edited by Bernard Finn and Daqing Yang The MIT Press Cambridge, Massachusetts London, England © 2009 Massachusetts Institute of Technology All rights reserved. No part of this book may be reproduced in any form by any electronic or mechanical means (including photocopying, recording, or information storage and retrieval) without permission in writing from the publisher. For information about special quantity discounts, please email special_sales@mitpress .mit.edu This book was set in Bembo by The MIT Press. Printed and bound in the United States of America. Library of Congress Cataloging-in-Publication Data Communications under the seas : the evolving cable network and its implications / edited by Bernard Finn and Daqing Yang. p. cm. — (Dibner Institute studies in the history of science and technology) Includes bibliographical references and index. ISBN 978-0-262-01286-7 (hardcover : alk. paper) 1. Cables, Submarine—History. 2. Telecommunication—Social aspects—History. 3. Communication, International. I. Finn, Bernard S., 1932– II. Yang, Daqing, 1964– TK5103.15.C66 2009 621.387’8409162—dc22 2008042011 10 9 8 7 6 5 4 3 2 1 Index Admiralty (U.K.), 187 for voice communications, 37–38, 46, “Memorandum on the Protection of 51 British Submarine Cables,” 194 vacuum tube amplifiers, 30, 37, 46, 247 Ahvenainen, Jorma, 119 Anglo-American Telegraph Company, 29t, Alcatel, 175, 280 66, 71, 82–83, 162–163, 166 Alexander, grand duke of Russia, 124, 126 anti-trust legislation, 199 Algeria, 185 Associated Press, 169, 266 All America Cables, 33, 35, 84, 280 Atlantic Telegraph Company, 18, 66, 167 All-American Telegraph Companies, 89 AT&T. -
A High-Performance, Single-Signal, Direct-Conversion Receiver with DSP Filtering
By Rob Frohne, KL7NA A High-Performance, Single- Signal, Direct-Conversion Receiver with DSP Filtering By adding a DSP demodulator to a well-established and popular receiver design—KK7B’s R2— you can have a bit of the latest filter technology at your fingertips! ith so many new radios incor- realistic to have a digital filter with the Motorola 56002 processor uses 24 bits of porating digital signal proces- equivalent of hundreds of poles. (In the precision; the TI TMS320C5X uses only sing (DSP) for demodulation analog domain, it takes one inductor or 16. It was obvious that we needed to start W and filtering, I got the itch to capacitor to make one pole.) Few analog over. play with one myself. By “play with one,” designers use more than ten poles in a fil- That start didn’t come until I taught a I don’t mean merely operate a DSP- ter, because it’s very difficult to make an communication systems course during the equipped receiver, I wanted to be able to analog filter with more than about ten poles winter quarter of 1996. As a homework as- put my own software into the receiver and work properly. signment, I had my students try the Motorola put to work some of those nifty signal-pro- EVM (evaluation module) in place of the cessing ideas I teach others how to use! Some Background TI DSK. It proved simple to modify a filter This project started in 1994. Ralph program supplied by Motorola to do the Why DSP? Stirling, KC3F, and I did exactly what Rick basic filtering necessary for SSB demo- You may wonder “What’s the big deal?” Campbell, KK7B, suggested in his R2 re- dulation, and it worked much better than the Why are so many of the new radios sup- ceiver article.1 (Get your copy of that article TI DSK-based receiver. -
Technical Handbook for Radio Monitoring HF
Technical Handbook for Radio Monitoring HF Edition 2013 2 Dipl.- Ing. Roland Proesch Technical Handbook for Radio Monitoring HF Edition 2013 Description of modulation techniques and waveforms with 259 signals, 448 pictures and 134 tables 3 Bibliografische Information der Deutschen Nationalbibliothek Die Deutsche Nationalbibliothek verzeichnet diese Publikation in der Deutschen Nationalbibliografie; detaillierte bibliografische Daten sind im Internet über http://dnb.d-nb.de abrufbar. © 2013 Dipl.- Ing. Roland Proesch Email: [email protected] Production and publishing: Books on Demand GmbH, Norderstedt, Germany Cover design: Anne Proesch Printed in Germany Web page: www.frequencymanager.de ISBN 9783732241422 4 Acknowledgement: Thanks for those persons who have supported me in the preparation of this book: Aikaterini Daskalaki-Proesch Horst Diesperger Luca Barbi Dr. Andreas Schwolen-Backes Vaino Lehtoranta Mike Chase Disclaimer: The information in this book have been collected over years. The main problem is that there are not many open sources to get information about this sensitive field. Although I tried to verify these information from different sources it may be that there are mistakes. Please do not hesitate to contact me if you discover any wrong description. 5 6 Content 1 LIST OF PICTURES 19 2 LIST OF TABLES 29 3 REMOVED SIGNALS 33 4 GENERAL 35 5 DESCRIPTION OF WAVEFORMS 37 1.1 Analogue Waveforms 37 Amplitude Modulation (AM) 37 Double Sideband reduced Carrier (DSB-RC) 38 Double Sideband suppressed Carrier (DSB-SC) 38 Single Sideband -
Maintenance of Remote Communication Facility (Rcf)
ORDER rlll,, J MAINTENANCE OF REMOTE commucf~TIoN FACILITY (RCF) EQUIPMENTS OCTOBER 16, 1989 U.S. DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION AbMINISTRATION Distribution: Selected Airway Facilities Field Initiated By: ASM- 156 and Regional Offices, ZAF-600 10/16/89 6580.5 FOREWORD 1. PURPOSE. direction authorized by the Systems Maintenance Service. This handbook provides guidance and prescribes techni- Referenceslocated in the chapters of this handbook entitled cal standardsand tolerances,and proceduresapplicable to the Standardsand Tolerances,Periodic Maintenance, and Main- maintenance and inspection of remote communication tenance Procedures shall indicate to the user whether this facility (RCF) equipment. It also provides information on handbook and/or the equipment instruction books shall be special methodsand techniquesthat will enablemaintenance consulted for a particular standard,key inspection element or personnel to achieve optimum performancefrom the equip- performance parameter, performance check, maintenance ment. This information augmentsinformation available in in- task, or maintenanceprocedure. struction books and other handbooks, and complements b. Order 6032.1A, Modifications to Ground Facilities, Order 6000.15A, General Maintenance Handbook for Air- Systems,and Equipment in the National Airspace System, way Facilities. contains comprehensivepolicy and direction concerning the development, authorization, implementation, and recording 2. DISTRIBUTION. of modifications to facilities, systems,andequipment in com- This directive is distributed to selectedoffices and services missioned status. It supersedesall instructions published in within Washington headquarters,the FAA Technical Center, earlier editions of maintenance technical handbooksand re- the Mike Monroney Aeronautical Center, regional Airway lated directives . Facilities divisions, and Airway Facilities field offices having the following facilities/equipment: AFSS, ARTCC, ATCT, 6. FORMS LISTING. EARTS, FSS, MAPS, RAPCO, TRACO, IFST, RCAG, RCO, RTR, and SSO. -
Federal Communications Commission § 97.307
Federal Communications Commission § 97.307 § 97.307 Emission standards. (1) No angle-modulated emission may have a modulation index greater than 1 (a) No amateur station transmission at the highest modulation frequency. shall occupy more bandwidth than nec- (2) No non-phone emission shall ex- essary for the information rate and ceed the bandwidth of a communica- emission type being transmitted, in ac- tions quality phone emission of the cordance with good amateur practice. same modulation type. The total band- (b) Emissions resulting from modula- width of an independent sideband emis- tion must be confined to the band or sion (having B as the first symbol), or segment available to the control opera- a multiplexed image and phone emis- tor. Emissions outside the necessary sion, shall not exceed that of a commu- bandwidth must not cause splatter or nications quality A3E emission. keyclick interference to operations on (3) Only a RTTY or data emission adjacent frequencies. using a specified digital code listed in (c) All spurious emissions from a sta- § 97.309(a) of this part may be transmit- tion transmitter must be reduced to ted. The symbol rate must not exceed the greatest extent practicable. If any 300 bauds, or for frequency-shift key- spurious emission, including chassis or ing, the frequency shift between mark power line radiation, causes harmful and space must not exceed 1 kHz. interference to the reception of an- (4) Only a RTTY or data emission other radio station, the licensee of the using a specified digital code listed in interfering amateur station is required § 97.309(a) of this part may be transmit- to take steps to eliminate the inter- ted. -
Southwest Region Spectrum Management Handbook
ORDER SW 6050.12A SOUTHWEST REGION SPECTRUM MANAGEMENT HANDBOOK (Date of Order to be entered at time of ASW-400 signature) DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATION Distribution: A-X-5; A-FAF/AT-0 (STD) Initiated By: ASW-473 RECORD OF CHANGES DIRECTIVE NO. SW 6050.12A CHANGE SUPPLEMENTS OPTIONAL CHANGE SUPPLEMENTS OPTIONAL TO TO BASIC BASIC 12/12/01 SW 6050.12A FOREWORD The radio frequency spectrum is a finite, vital, and very limited natural resource available to all countries of the world. This international resource serves mankind in innumerable ways, and each country exercises its own sovereign rights in the use of the electromagnetic waves. Because the radio spectrum knows no bounds, its use cannot be restricted to individual countries. Requirements for use of this resource generally exceed the amount available; therefore, it is necessary that international, national, and regional spectrum management be rigidly practiced. The purpose of this spectrum management order is to present radio frequency spectrum information, guidance, and policy to those organizations using or administrating the radio frequency spectrum within the Southwest Region. Marcos Costilla Manager, Airway Facilities Division Page i (and ii) SW 6050.12A 12/12/01 Page ii 12/12/01 SW 6050.12A TABLE OF CONTENTS CHAPTER 1. ORGANIZATION, AUTHORITY AND RESPONSIBILITY 1. Purpose..................................................................................................................................................................... 1 2. Distribution.............................................................................................................................................................. -
By the HERALD's Special Wire!
Gale Primary Sources Start at the source. “By the HERALD’s Special Wire!”: Technology and Speed in Transnational News Clare Pettitt King’s College London Various source media, International Herald Tribune Historical Archive 1887-2013 EMPOWER™ RESEARCH “information is speed” Street where a young prostitute, Helen Jewett, had been murdered. Such novel and sensational reporting Paul Virilio, The Art of the Motor (1995) i drove the paper’s circulation up to 10,000. The New York Herald did well out of the Civil War; with 63 reporters in the field, it became a trusted source of war news. Post-war, the American economy boomed and James Bennett, and his son, Gordon Bennett, who ran Bennett Snr. was among the first to realise the the New York Herald and then simultaneously the New importance to a growing economy of fresh financial York Herald European Edition (later renamed as the news, daily Wall Street reports and detailed shipping International Herald Tribune), were remarkable in their ii news. He started the practice of sending boats out to early understanding of the possibilities of electronic meet incoming ships to collect the news from abroad. communication for creating news. In their newspapers, He made his newspaper useful to its readers in new they exploited the speed of the new transatlantic cables ways. He understood that speed and news were in a way which makes them very significant figures in conjoined concepts in what would come to be called the the creation of a culture of non-stop global news. They Gilded Age, and that financial investments depended on understood that delayed information exponentially good market information. -
Short Wave Radio
Short Wave Radio A Working Electronic Sculpture Honoring the History of Radio Please note: This radio picks up short wave stations, but for your best satisfaction it will require a little time and attention, both to learn how to operate it and to appreciate the principles and history that it embodies. You’ll find bare-bones instructions on this page and more details inside the notebook. To turn the radio on, rotate the volume control clockwise until you hear a click, then set its dial to 3 or 4. If the radio was not already turned on, you’ll have to wait about 30 seconds for its vacuum tubes to warm up. •Put on the headphones. •Set the radio’s other controls as follows: •RF Gain: Fully clockwise. •Preselector: 1 •Tuning: 20 •Fine Tuning: 5.0 (This works like a clock, only with ten “hours” instead of 12) •Regeneration: 7 (Or advance slowly clockwise from zero until just after the point you hear a louder hiss in the headphones.) •Volume: Set to a comfortable level, usually about 4. Now, slowly adjust the TUNING control back and forth looking for squeals that indicate signals. (The shortwave broadcast band with 31 meter wavelength is located between about 10 and 30 on the dial.) You’ll should find a few unless ionospheric conditions are particularly poor on this day. Leave the TUNING control set on a loud squeal. Then slowly adjust the FINE TUNING to “zero beat.” (You’ll notice as you move the dial across a signal, it starts with a high-pitched note, moving down to a low-pitched or zero note, then back up to high pitch again.