1、BRITISH STANDARD AEROSPACE SERIES BS EN 2591-606:2002 Elements of electrical and optical connection Test methods Part 606: Optical elements Crosstalk The European Standard EN 2591-606:2002 has the status of a British Standard ICS 49.060 BS EN 2591-606:2002 This British Standard, having been prepared
2、 under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 11 July 2002 BSI 11 July 2002 ISBN 0 580 40042 5 National foreword This British Standard is the official English language version of EN 25
3、91-606:2002. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology, to Subcommittee ACE/6/10, Aerospace Fibre optic systems and equipment which has the responsibility to: A list of organizations represented on this
4、 subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”,
5、 or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confe
6、r immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the
7、UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 4, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date
8、CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN2591606 June2002 ICS49.060 Englishversion AerospaceseriesElementsofelectricalandopticalconnection TestmethodsPart606:OpticalelementsCrosstalk SriearospatialeOrganesdeconnexionlectriqueet optiqueMthodesdessaisPartie606:Organesoptiques Diaphonie
9、 LuftundRaumfahrtElektrischeundoptische VerbindungselementePrfverfahrenTeil606:Optische Elementebersprechen ThisEuropeanStandardwasapprovedbyCENon8February2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanation
10、alstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresp
11、onsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Swed
12、en,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN2591606:2002EEN2591606:200
13、2(E) 2 Foreword Thisdocument(EN2591606:2002)hasbeenpreparedbytheEuropeanAssociationofAerospace Manufacturers(AECMA). AfterenquiriesandvotescarriedoutinaccordancewiththerulesofthisAssociation,thisStandardhas receivedtheapprovaloftheNationalAssociationsandtheOfficialServicesofthemembercountriesof AECM
14、A,priortoitspresentationtoCEN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidentical textorbyendorsement,atthelatestbyDecember2002,andconflictingnationalstandardsshallbe withdrawnatthelatestbyDecember2002. AccordingtotheCEN/CENELECInternalRegulations,thenation
15、alstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark, Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway, Portugal,Spain,Sweden,SwitzerlandandtheUnitedKingdomEN2591606:2002(E) 3 1 Scope This
16、standardspecifiesamethodofmeasuringtheforwardandbackwardcrosstalkoflightbetweenmulti channelopticalconnectionelements. ItshallbeusedtogetherwithEN2591100. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreferenceprovisionsfromotherpublications. Thesenormativereferencesareciteda
17、ttheappropriateplacesinthetextandthepublicationsarelisted hereafter.Fordatedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplyto thisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthe latesteditionofthepublicationreferredtoapplies. EN2591100
18、AerospaceseriesElementsofelectricalandopticalconnectionTestmethods Part100:General 1) EN2591601 AerospaceseriesElementsofelectricalandopticalconnectionTestmethods Part601:OpticalelementsInsertionloss 2) TR4257 AerospaceseriesElementsofelectricalandopticalconnectionRelationshipbetween thenumberingsys
19、temsforpartsofEN2591 3) 3 Preparationofspecimens 3.1 Specimensshallbefittedwithnormalaccessoriesandterminatedasspecifiedintheproduct standard.Allcavitiesshallbefittedwithterminatedcontacts. 3.2 Unlessotherwisespecifiedinthetechnicalspecification,thefollowingdetailsshallbestated: typeandlengthofcable
20、/fibre; maximumpermissiblecrosstalk(forwardandbackward); forspecimenswithmorethantwopaths,theselectionofthepathstobemeasured; forspecimensofasymmetricalopticaldesignthemeasurementsshallbecarriedoutwitheachfibre alternativelyexcitedinbothdirections. 4 Apparatus Itshallcomprise: aLightLaunchSystem(LLS
21、)asdefinedinEN2591100; aLightDetectorSystem(LDS)asdefinedinEN2591100; TemporaryJoints(TJ)asdefinedinEN2591601; aTerminator(T)asdefinedinEN2591100toprovideanonreflectivetermination. 1) PublishedasAECMAPrestandardatthedateofpublicationofthisstandard 2) SeeTR4257. 3) PublishedasAECMATechnicalReportatth
22、edateofpublicationofthisstandardEN2591606:2002(E) 4 5 Method 5.1 Procedure Seefigure1. a) Beforeinsertingthespecimen,connectLLStooneendofthefibre1andconnectLDStotheopposite end.Maximizetheoutputpowerandmeasure Po. b) Insertthespecimenonfibre1at L/2andintroducefibre2andconnectT. c) ConnectafirstLDSto
23、adjacentfibre2andmeasure P b. d) ConnectasecondLDStotheoppositeendofthisfibreandmeasure Pf Figure1 e) Calculatetheforwardandbackwardcrosstalkusingthefollowingformulae: Forwardcrosstalk(dB) = - 10log Po Pf Backwardcrosstalk(dB) = - 10log Po Pb where: Pb: backwardpoweroutputoffibre2 Pf: forwardpowerou
24、tputoffibre2 Po: opticalpowerinfibre1 L/2: Cablelength“ L“dividedbytwoblankBS EN 2591-606:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe a
25、nd at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products
26、and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400. BSI o
27、ffers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fa
28、x: +44 (0)20 8996 7001. Email: ordersbsi-. Standards are also available from the BSI website at http:/www.bsi-. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Inf
29、ormation on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contac
30、t the Information Centre. Tel: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: infobsi-. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership A
31、dministration. Tel: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 7001. Email: membershipbsi-. Information regarding online access to British Standards via British Standards Online can be found at http:/www.bsi- Further information about BSI is available on the BSI website at http:/www.bsi-. Copyright Co
32、pyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any f
33、orm or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. Details and advice can be obtained from the Copyright & Licensing Manager. Tel: +44 (0)20 8996 7070. Fax: +44 (0)20 8996 7553. Email: copyrightbsi-.
