EN 61280-2-2:2008
(Main)Fibre optic communication subsystem test procedures - Part 2-2: Digital systems - Optical eye pattern, waveform and extinction ratio measurement
Fibre optic communication subsystem test procedures - Part 2-2: Digital systems - Optical eye pattern, waveform and extinction ratio measurement
This part of IEC 61280 is to describe a test procedure to measure the eye pattern and waveform parameters such as rise time, fall time, overshoot, and extinction ratio. Alternatively, the waveform may be tested for compliance with a predetermined waveform mask. This edition includes the following significant technical changes with respect to the previous edition: - the necessity of DC coupling for extinction ratio measurement is clarified; - the definition of extinction ratio has been revised to better harmonize with ITU-T; and - the definition of OMA has been clarified.
Prüfverfahren für Lichtwellenleiter-Kommunikationsuntersysteme - Teil 2-2: Digitale Systeme - Messung des optischen Augendiagramms, der Wellenform und des Extinktionsverhältnisses
Procédures d'essai des sous-systèmes de télécommunications à fibres optiques - Partie 2-2: Systèmes numériques - Mesure du diagramme de l'oeil optique, de la forme d'onde et du taux d'extinction
La présente partie de la CEI 61280 a pour objet de décrire une procédure d'essai pour mesurer le diagramme de l'oeil et les paramètres de la forme d'onde tels que le temps de montée, le temps de descente, le taux de suroscillation et le taux d'extinction. Sinon, la forme d'onde peut être déterminée avec un masque de forme d'onde prédéterminé. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - la nécessité d'un couplage en courant continu pour les mesures du taux d'extinction est clarifiée; - la définition du taux d'extinction a été révisée pour une meilleure harmonisation avec les recommandations UIT-T; et - la définition de l'amplitude de modulation optique (OMA, optical modulation amplitude) a été clarifiée.
Postopki preskušanja optičnega komunikacijskega podsistema - 2-2. del: Digitalni sistemi - Merjenje po vzorcu optičnega očesa, valovne oblike in hitrosti ugašanja (IEC 61280-2-2:2008)
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prüfverfahren für Lichtwellenleiter-Kommunikationsuntersysteme - Teil 2-2: Digitale Systeme - Messung des optischen Augendiagramms, der Wellenform und des Extinktionsverhältnisses (IEC 61280-2-2:2008)Procédures d'essai des sous-sytemes de télécommunications a fibres optiques - Partie 2-2: Systemes numériques - Mesure du diagramme de l'oeil optique, de la forme d'onde et du taux d'extinction (CEI 61280-2-2:2008)Fibre optic communication subsystem test procedures - Part 2-2: Digital systems - Optical eye pattern, waveform and extinction ratio measurement (IEC 61280-2-2:2008)33.180.01VSORãQRFibre optic systems in generalICS:Ta slovenski standard je istoveten z:EN 61280-2-2:2008SIST EN 61280-2-2:2008en,fr01-oktober-2008SIST EN 61280-2-2:2008SLOVENSKI
STANDARDSIST EN 61280-2-2:20061DGRPHãþD
EUROPEAN STANDARD EN 61280-2-2 NORME EUROPÉENNE
EUROPÄISCHE NORM August 2008
CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2008 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61280-2-2:2008 E
ICS 33.180.01 Supersedes EN 61280-2-2:2005
English version
Fibre optic communication subsystem test procedures -
Part 2-2: Digital systems -
Optical eye pattern, waveform and extinction ratio measurement
(IEC 61280-2-2:2008)
Procédures d'essai des sous-systèmes
de télécommunications à fibres optiques - Partie 2-2: Systèmes numériques -
Mesure du diagramme de l'oeil optique,
de la forme d'onde et du taux d'extinction (CEI 61280-2-2:2008)
Prüfverfahren für Lichtwellenleiter-Kommunikationsuntersysteme -
Teil 2-2: Digitale Systeme -
Messung des optischen Augendiagramms, der Wellenform
und des Extinktionsverhältnisses (IEC 61280-2-2:2008)
This European Standard was approved by CENELEC on 2008-06-01. CENELEC members are bound to comply with the CEN/CENELEC 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 national standards may be obtained on application to the Central Secretariat or to any CENELEC 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 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, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
- 2 -
Foreword The text of document 86C/768/CDV, future edition 3 of IEC 61280-2-2, prepared by SC 86C, Fibre optic systems and active devices, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61280-2-2 on 2008-06-01. This European Standard supersedes EN 61280-2-2:2005. EN 61280-2-2:2008 includes the following significant technical changes with respect to EN 61280-2-2:2005: – the necessity of DC coupling for extinction ratio measurement is clarified; – the definition of extinction ratio has been revised to better harmonize with ITU-T; – the definition of OMA has been clarified. The following dates were fixed: – latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement
(dop)
2009-03-01 – latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow)
2011-06-01 Annex ZA has been added by CENELEC. __________ Endorsement notice The text of the International Standard IEC 61280-2-2:2008 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60825-1 NOTE
Harmonized as EN 60825-1:2007 (not modified). IEC 61281-1 NOTE
Harmonized as EN 61281-1:1999 (not modified). __________
- 3 - EN 61280-2-2:2008 Annex ZA (normative)
Normative references to international publications with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
NOTE
When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
Publication Year Title EN/HD Year
ITU-T Recommendation G.957 -1) Optical interfaces for equipments and systems relating to the synchronous digital hierarchy - -
1) Undated reference.
IEC 61280-2-2Edition 3.0 2008-03INTERNATIONAL STANDARD NORME INTERNATIONALEFibre optic communication subsystem test procedures –
Part 2-2: Digital systems – Optical eye pattern, waveform and extinction ratio measurement
Procédures d'essai des sous-systèmes de télécommunications à fibres
optiques –
Partie 2-2: Systèmes numériques – Mesure du diagramme de l’œil optique,
de la forme d’onde et du taux d’extinction
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE UICS 33.180.01 PRICE CODECODE PRIXISBN 2-8318-9637-1
– 2 – 61280-2-2 © IEC:2008 CONTENTS FOREWORD.4
1 Scope and object.6 2 Normative references.6 3 Apparatus.6 3.1 Time-domain optical detection system.7 3.1.1 Optical-to-electrical (O/E) converter.7 3.1.2 Resistive signal splitter (optional).8 3.1.3 Linear-phase low-pass filter.8 3.1.4 Oscilloscope.10 3.1.5 Overall system response.10 3.2 Oscilloscope synchronization system.10 3.3 Pulse pattern generator.11 3.4 Optical power meter.11 3.5 Optical attenuator.11 3.6 Test cord.11 4 Test sample.11 5 Procedure.12 5.1 Method 1: Basic waveform measurement.12 5.2 Method 2: Extinction measurement method using the histogram function.12 6 Calculation.14 6.1 Basic waveform measurement definitions.14 6.2 Method 2: Extinction measurement method using the histogram function.17 6.3 Eye-diagram analysis using a mask.18 7 Test result.19 7.1 Required information.19 7.2 Available information.19 7.3 Specification information.20
Annex A (informative)
Oscilloscope synchronization system.23
Bibliography.27
Figure 1 – Optical eye pattern, waveform, and extinction ratio measurement configuration.6 Figure 2 – Time-domain optical detection system.7 Figure 3 – Illustrations of NRZ and RZ eye-diagram parameters.17 Figure 4 – Example of eye pattern measured with 0,75/T low-pass filter.18 Figure 5 – Example of eye pattern measured with 3,0/T low-pass filter.19 Figure 6 – Eye diagram with vertical histogram data collected
from the central 20 % window.19 Figure A.1 – Oscilloscope synchronization system.23
Table 1 – Frequency response characteristics.10 Table 2 – Typical parameters for the measurement shown in Figure 4.21
61280-2-2 © IEC:2008 – 3 – Table 3 – Typical parameters for the measurement shown in Figure 5.22 Table A.1 – Example lengths of common RG-58 cable.25
– 4 – 61280-2-2 © IEC:2008 INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
FIBRE OPTIC COMMUNICATION
SUBSYSTEM TEST PROCEDURES –
Part 2-2: Digital systems –
Optical eye pattern, waveform and
extinction ratio measurement
FOREWORD 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61280-2-2 has been prepared by subcommittee 86C: Fibre optic systems and active devices, of IEC technical committee 86: Fibre optics.
This third edition cancels and replaces the second edition published in 2005 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) The necessity of DC coupling for extinction ratio measurement is clarified. b) The definition of extinction ratio has been revised to better harmonize with ITU-T. c) The definition of OMA has been clarified.
61280-2-2 © IEC:2008 – 5 – The text of this standard is based on the following documents: CDV Report on voting 86C/768/CDV 86C/801/RVC
Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 61280 series, publishe
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