EN 60512-25-4-2001 en Connectors for Electronic Equipment - Tests and Measurements Part 25-4 Test 25d - Propagation Delay《电子设备用连接器 试验和测量 第25-4部分 试验25d 传输延迟 IEC 60512-25-4-2001》.pdf
《EN 60512-25-4-2001 en Connectors for Electronic Equipment - Tests and Measurements Part 25-4 Test 25d - Propagation Delay《电子设备用连接器 试验和测量 第25-4部分 试验25d 传输延迟 IEC 60512-25-4-2001》.pdf》由会员分享,可在线阅读,更多相关《EN 60512-25-4-2001 en Connectors for Electronic Equipment - Tests and Measurements Part 25-4 Test 25d - Propagation Delay《电子设备用连接器 试验和测量 第25-4部分 试验25d 传输延迟 IEC 60512-25-4-2001》.pdf(15页珍藏版)》请在麦多课文档分享上搜索。
1、BRITISH STANDARD Connectors for electronic equipment - Tests and measurements - Part 25-4: Test 25d - Propagation delay The European Standard EN 60512-25-4:2001 has the status of a British Standard ICs :31.220.10 BS EN 60512-25-4: 2001 IEC 60512-25-4: 2001 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS
2、 PERMITTED BY COPYRIGHT LAW BS EN 60512-25-4:2001 Amd. No. National foreword Date Comments This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on
3、 19 November 2001 This British Standard is the official English language version of EN 60512-25-4:2001. It is identical with IEC 60512-25-4:2001 The UK participation in its preparation was entrusted by Technical Committee EPW48, Electromechanical components far electronic equipment, to Subcommittee
4、EPL/48/2, Connectors for electronic equipment, which has the responsibility to: - - aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related inte
5、rnational and European developments and promulgate them in the UK. - A list of organizations represented on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumber
6、ed as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international or European publications referred to in this document may be found in th
7、e BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, 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 res
8、ponsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 12, an inside back cover and a back cover. The BSI copyri
9、ght date displayed in this document indicates when the document was last issued. 8 BSI i9 November 2001 2 EUROPEAN STANDARD EN 6051 2-25-4 NORME EUROPENNE EUROPISCHE NORM October 2001 ICs 31.220.10 English version Connectors for electronic equipment - Tests and measurements Part 25-4: Test 25d - Pro
10、pagation delay (I EC 605 1 2-25-41 200 I ) Connecteurs pour quipements lectroniques - Essais et mesures Partie 25-4: Essai 25d - Retard de propagation (CE1 60512-25-4:2001) Steckverbinder fr elektronische Einrichtungen - Mess- und Prfverfahren Teil 25-4: Prfung 25d - Laufzeitverzgerung (IEC 6051 2-2
11、5-4:2001) This European Standard was approved by CENELEC on 2001-10-01. CENELEC members are bound to comply with the CENICENELEC 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 biblio
12、graphical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three oficial versions (English, French, German). A version in any other language made by translation under the responsibility
13、of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemb
14、ourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35,B - 1050
15、 Brussels O 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60512-25-4:2001 E Page 2 EN 60512-25-4:2001 Foreword The text of document 488/1061/FDIS, future edition 1 of IEC 60512-25-4, prepared by SC 488, Connectors, of IEC T
16、C 48, Electromechanical components and mechanical structures for electronic equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60512-25-4 on 2001-10-01. The following dates were fixed: - latest date by which the EN has to be implemented at national level by p
17、ublication of an identical national standard or by endorsement - latest date by which the national standards conflicting with the EN have to be withdrawn Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this stan
18、dard, annex A is normative and annex 6 is informative. (dop) 2002-07-01 (dow) 2004-10-01 Endorsement notice The text of the International Standard IEC60512-254:2001 was approved by CENELEC as a European Standard without any modification. O BSI 19 November 2001 Page 3 EN 60512-25-4:2001 CONTENTS Gene
19、ral . 4 1 . 1 Scope and object 4 1.2 Definitions 4 Test resources . 4 2.1 Equipment 4 2.2 Fixture 5 Method A, single-ended 5 Method B, differentially driven . 5 Test specimen . 6 3.1 Description . 6 3.1 . 1 Separable connectors . 6 3.1.2 Cable assembly 6 3.1.3 Sockets . 6 Test procedure 6 4.1 Probe
20、technique . 6 4.2 Insertion technique . 7 4.3 Reference fixture technique 7 Details to be specified . 7 Test documentation . 7 2.2.1 2.2.2 Annex A (normative) Diagrams and schematics of fixtures and equipment 9 Annex B (informative) Practical guidance . 12 Figure I . Rise time measurement points . 8
21、 Figure 2 . Propagation delay measurement points . 8 Figure A.1 . Technique diagrams . 9 Figure A.2 . Single-ended terminations . 10 Figure A.3 . Differential (balanced) terminations . 11 Table 1 . Recommended measurement system rise time (including fixture and filtering) 6 O BSI 19 November 2001 Pa
22、ge 4 EN 60512-25-42001 CONNECTORS FOR ELECTRONIC EQUIPMENT - TESTS AND MEASUREMENTS - Part 25-4: Test 256 - Propagation delay 1 General 1.1 Scope and object This part of IEC 60512 applies to electrical connectors, sockets, cable assemblies or inter- connection systems. This standard describes a meth
23、od for measuring the time it takes for a digital signal to propagate from one specified point to a second specified point. 1.2 Definitions For the purpose of this part of IEC 6051 2, the following definitions apply. 1.2.1 measurement system rise time rise time measured with the fixture in place, wit
24、hout the specimen, and with filtering (or normalization). Rise time is typically measured from 10 % to 90 % levels; see figure 1 1.2.2 specimen environment impedance impedance presented to the signal conductors by the fixture. This impedance is a result of transmission lines, termination resistors,
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