1、Important NoticeThis document is a copyrighted IEEE Standard. You may use this document inconnection with IEEE Standards development/revision activities and/or forpersonal use relating to your own work. No further reproduction or distributionof this document is permitted without the express written
2、permission of IEEEStandards Activities, 445 Hoes Lane, P.O. Box 1331, Piscataway, NJ 08855-1331.Recognized as anAmerican National Standard (ANSI)The Institute of Electrical and Electronics Engineers, Inc.345 East 47th Street, New York, NY 10017-2394, USACopyright 1996 by the Institute of Electrical
3、and Electronics Engineers, Inc.All rights reserved. Published 1996. Printed in the United States of America.ISBN 1-55937-722-4No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher.IEEE Std 1260
4、-1996IEEE Guide on the Prediction, Measurement, and Analysis of AM Broadcast Reradiation by Power LinesSponsorTransmission and Distribution Committeeof theIEEE Power Engineering SocietyApproved 14 February 1996IEEE Standards BoardApproved 16 July 1996American National Standards InstituteAbstract: A
5、set of procedures to be followed to cope with reradiation of AM broadcast signals frompower lines and other large metallic structures is provided. Reradiation may be described as elec-tromagnetic waves radiated from a structure that has parasitically picked up a signal from the envi-ronment. A simpl
6、ified prediction technique called a survey is described to determine whichstructures could possibly cause a problem. Guidelines for measurements and data analysis are in-cluded.Keywords: AM broadcast, interference prediction, measurement, power lines, reradiationIEEE Standards documents are develope
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17、Attention is called to the possibility that implementation of this standard mayrequire use of subject matter covered by patent rights. By publication of this standard,no position is taken with respect to the existence or validity of any patent rights inconnection therewith. The IEEE shall not be res
18、ponsible for identifying all patents forwhich a license may be required by an IEEE standard or for conducting inquiries intothe legal validity or scope of those patents that are brought to its attention.iiiIntroduction(This introduction is not a part of IEEE Std 1260-1996, IEEE Guide on the Predicti
19、on, Measurement, and Analysis ofAM Broadcast Reradiation by Power Lines.)This guide provides a set of procedures to be followed to cope with reradiation of AM broadcast signalsfrom power lines and other large metallic structures. Reradiation may be described as electromagnetic wavesradiated from a s
20、tructure that has parasitically picked up a signal from the environment. A simplified predic-tion technique called a survey is described to determine which structures could possibly cause a problem.Guidelines for measurements and data analysis are included.While the procedures listed in this guide m
21、ay be applicable to reradiation problems from other medium fre-quency (MF) sources, such as navigation beacons, they are not intended to be applied to reradiation prob-lems from higher frequency sources, such as television broadcast signals. It is anticipated that this guide willbe used by owners of
22、 potentially reradiating structures, and radio stations. It is not designed to be applied aslegal evidence of harmful effects of a reradiating structure upon an AM broadcasting station.In some political jurisdictions, the government regulatory or licensing authority has defined specific proce-dures
23、for the determination of radiation patterns of medium wave antenna systems. Some of these proce-dures are also contained in international treaties and agreements, and as such are binding on the licensees ofthe signatory jurisdictions. When there is agreement between the party or parties who are lice
24、nsed to operatethe medium wave antenna system(s) in question and the parties proposing construction of potential reradiat-ing structures, the procedures of the responsible government agency or authority shall have precedence overthe method outlined in this guide.Rick C. Madge, ChairOther contributor
25、s include:The following persons were on the balloting committee:Thomas J. McDermott Robert G. Olsen James R. StewartRod S. BaishikiMagda HammamJim HatfieldAttila PaldiJean ProvostMichael A. ReavisMark A. TilstonTom YoungJames E. ApplequistJoseph F. BuchJames J. BurkeVernon L. ChartierFrank A. Denbro
26、ckWilliam E. FeeroI. S. GrantWasyl JanischewskyjJohn G. KappenmanGeorge G. KaradyNestor KolcioJoe H. MalloryP. Sarma MaruvadaThomas J. McDermottFranklin D. MyersGeorge B. NilesStig L. NilssonR. J. PiwkoW. Edward ReidB. R. ShperlingJames R. StewartivWhen the IEEE Standards Board approved this guide o
27、n 14 February 1996, it had the followingmembership:Donald C. Loughry, Chair Richard J. Holleman, Vice ChairAndrew G. Salem, Secretary*Member EmeritusAlso included are the following nonvoting IEEE Standards Board liaisons:Satish K. AggarwalAlan H. CooksonChester C. TaylorMary Lynne NielsenIEEE Standa
28、rds Project EditorGilles A. BarilClyde R. CampJoseph A. CannatelliStephen L. DiamondHarold E. EpsteinDonald C. FleckensteinJay Forster*Donald N. HeirmanBen C. JohnsonE. G. “Al” KienerJoseph L. Koepfinger*Lawrence V. McCallL. Bruce McClungMarco W. MigliaroMary Lou PadgettJohn W. PopeJose R. RamosArth
29、ur K. ReillyRonald H. ReimerGary S. RobinsonIngo RschJohn S. RyanChee Kiow TanLeonard L. TrippHoward L. Wolfmanv1. Overview. 12. References. 23. Definitions . 24. Background. . 44.1 Description. . 44.2 Proof of performance . . 55. AM reradiation guidelines: general procedures. . 65.1 Potential rerad
30、iation problems . . 65.2 Existing reradiation problems . . 66. Reradiation prediction techniques . . 76.1 Computer programs . . 76.2 Survey technique. . 87. Field strength measurements . . 97.1 Circular measurements . 107.2 Ratio measurements . 117.3 Test point selection criteria. 127.4 Near-Field m
31、easurements . 137.5 Factors affecting measurements.148. Field strength analysis . 148.1 Individual test analysiscircular measurements . 148.2 Individual test analysisratio measurements . 158.3 Signal fluctuation analysis . 168.4 Seasonal fluctuation analysis . 168.5 Before versus after analysiscircu
32、lar measurements . 178.6 Before versus after analysisratio measurements . 188.7 After-construction only analysiscircular measurements. 198.8 After-construction only analysisratio measurements. 219. Structure reradiation measurements. 229.1 Base current measurements . 229.2 Structure field strength r
33、eadings . 239.3 Scale-Model measurements . 2310. Remedial measures or alternatives . 2310.1 Power-Line tower skywire insulation . 2310.2 Power-Line tower detuning stubs . 2410.3 Power-Line skywire stubs. 2610.4 Alternatives . 2611. Bibliography . 27viAnnex A . 29(informative)Reradiation prediction c
34、omputer programs. 29Annex B . 30(informative)Reradiation survey example . 30Annex C . 31(informative)Before versus aftercircular measurement example . 31C.1 Individual test analysis examplecircular measurements. 32C.2 Typical signal fluctuation example. 34C.3 Seasonal signal fluctuation example. 34C.4 Before-versus-after analysis example.
