1、BRITISH STANDARD AEROSPACE SERIES Elements of electrical and optical connection Test methods Part 705: Electrical elements - Measurement of stub input impedance of couplers The European Standard EN 2591-705:2001 has the status ofa British Standard ICs 49.060 BS EN 2591 -705:2001 Wk present to the re
2、sponsible 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 UK. - A list of organizations represented on this subcommittee can be obtained on request
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5、Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 and 3 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. O BSI 14 December 2001 ISBN O 580 38130 7 EUROPEAN STANDARD NORME EUROPENNE
6、 EUROPISCHE NORM EN 2591-705 November 2001 ICs 49.060 English version Aerospace series - Elements of electrical and optical connection - Test methods - Part 705: Electrical elements - Measurement of stub input impedance of couplers Srie arospatiale - Organes de connexion lectrique et optique - Mthod
7、es dessais - Partie 705: Organes lectriques - Mesure de limpdance dentre de la drivation des coupleurs Luft- und Raumfahrt - Elektrische und optische Verbindungselemente - Prfverfahren - Teil 705: Elektrische Elemente - Messung der Eingangsimpedanz einer Stichleitung von Kopplern This European Stand
8、ard was approved by CEN on 4 June 2001 CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such n
9、ational standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and n
10、otified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland
11、and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN
12、2591-705:2001 E EN 2591-705:2001 (E) Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA) . After inquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Asso
13、ciations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2002, and conflicting national standards
14、shall be withdrawn at the latest by May 2002. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland
15、, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 2 EN 2591-705:2001 (E) 1 Scope This standard specifies a method of measuring stub input impedance of couplers. It shall be used together with EN 2591-100. 2 Normative references This European Stand
16、ard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to t
17、his European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 2591-100 Aerospace series - Elements of electrical and optical connection - Test methods - Part 100: General 1) 3 Preparation of specimens
18、 Unless specified in the technical specification, the following details shall be stated: - stub input impedance Z; - test temperature. 4 Method The test is carried out using an impedance meter connected as on figure 1 Key 1 Impedance meter 2 Bus 3 Stub R= (Z0/2) f 2 % Zo = Nominal cable characterist
19、ic impedance Figure 1 The test signal shall be sinusoidal, frequency 1 MHz, amplitude 2 0,3 V r.m.s. 5 Req u i remen t The stub input impedance Zshall comply with the value specified in the technical specification. 1) Published as AECMA Prestandard at the date of publication of this standard 3 BS EN
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