1、 IEC 61280-2-12 Edition 1.0 2014-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Fibre optic communication subsystem test procedures Part 2-12: Digital systems Measuring eye diagrams and Q-factor using a software triggering technique for transmission signal quality assessment Procdures dessai des sou
2、s-systmes de tlcommunication fibres optiques Partie 2-12: Systmes numriques Mesure des diagrammes de lil et du facteur de qualit laide dune technique par dclenchement logiciel pour lvaluation de la qualit de la transmission de signaux IEC 61280-2-12:2014-0 5(en-fr) colour inside THIS PUBLICATION IS
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20、onner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 61280-2-12 Edition 1.0 2014-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Fibre optic communication subsystem test procedures Part 2-12: Digital systems Measuring eye diagrams and Q-factor usin
21、g a software triggering technique for transmission signal quality assessment Procdures dessai des sous-systmes de tlcommunication fibres optiques Partie 2-12: Systmes numriques Mesure des diagrammes de lil et du facteur de qualit laide dune technique par dclenchement logiciel pour lvaluation de la q
22、ualit de la transmission de signaux INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE R ICS 33.180.10 PRICE CODE CODE PRIX ISBN 978-2-8322-1545-6 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique In
23、ternationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. colour inside 2 IEC 61280-2-12:2014 IEC 2014 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 6 2 Normativ
24、e references 6 3 Abbreviated terms . 6 4 Software synchronization method and Q-factor 6 4.1 Example of asynchronous waveform and eye diagram reconstructed by software triggering technique 6 4.2 Q-factor formula 7 5 Apparatus 9 5.1 General . 9 5.2 Optical bandpass filter 10 5.3 High frequency receive
25、r 10 5.4 Clock oscillator . 11 5.5 Electric pulse generator 11 5.6 Sampling module 11 5.7 Electric signal processing circuit . 12 5.8 Optical clock pulse generator 12 5.9 Optical sampling module . 12 5.10 Optical signal processing circuit 12 5.11 Synchronization bandwidth . 12 5.12 Monitoring system
26、 parameters 13 6 Procedure 13 6.1 General . 13 6.2 Measuring eye diagrams and Q calculations . 13 Annex A (informative) Example of the signal processing required to reconstruct the synchronous eye diagram . 15 Annex B (informative) Adequate sampling time width (gate width) 17 Bibliography 18 Figure
27、1 Asynchronous waveform and synchronous eye diagram of 40 Gbps RZ- signal reconstructed by software triggering technique . 7 Figure 2 RZ synchronous eye diagram reconstructed by software triggering technique, time window, and histogram . 8 Figure 3 Example of relationship between Q-factor and window
28、 width 8 Figure 4 Test system 1 for measuring eye diagrams and Q-factor using the software triggering technique 9 Figure 5 Test system 2 for measuring eye diagrams and Q-factor using the software triggering technique 10 Figure A.1 Block diagram of the software triggering module . 15 Figure A.2 Examp
29、le of interpolating a discrete spectrum and determining beat frequency 16 Figure B.1 The typical calculated relationship between the adequate sampling time width (gate width) and the bit rate of the optical signal 17 Table 1 Monitoring system parameters . 13 IEC 61280-2-12:2014 IEC 2014 3 INTERNATIO
30、NAL ELECTROTECHNICAL COMMISSION _ FIBRE OPTIC COMMUNICATION SUBSYSTEM TEST PROCEDURES Part 2-12: Digital systems Measuring eye diagrams and Q-factor using a software triggering technique for transmission signal quality assessment FOREWORD 1) The International Electrotechnical Commission (IEC) is a w
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40、C 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 subj
41、ect of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. The International Electrotechnical Commission (IEC) draws attention to the fact that it is claimed that compliance with this document may involve the use of patents concerning software synchronizat
42、ion given in Clause 4 and procedure for calculating eye-diagrams and Q-factor given in Clause 6. IEC takes no position concerning the evidence, validity and scope of these patent rights. The holders of these patent rights have assured the IEC that they are willing to negotiate licences either free o
43、f charge or under reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this respect, the statements of these holders of these patent rights are registered with IEC. 4 IEC 61280-2-12:2014 IEC 2014 For US patent 6,744,496, information may be obtained from: Al
44、catel-Lucent Intellectual Property Business Group 16 Brookside Dr. Sutton, MA 01590 USA For Japanese patent 3987001 and US patent 7190752, information may be obtained from: Nippon Telegraph and Telephone Corporation 9-11, Midori-cho, 3-Chrome Musashino-Shi Tokyo 180-8585 Japan Attention is drawn to
45、the possibility that some of the elements of this document may be the subject of patent rights other than those identified above. IEC shall not be held responsible for identifying any or all such patent rights. ISO (www.iso.org/patents) and IEC (http:/patents.iec.ch) maintain on-line data bases of p
46、atents relevant to their standards. Users are encouraged to consult the data bases for the most up to date information concerning patents. International Standard IEC 61280-2-12 has been prepared by subcommittee 86C: Fibre optic systems and active devices, of IEC technical committee 86: Fibre optics.
47、 The text of this standard is based on the following documents: CDV Report on voting 86C/1150/CDV 86C/1220/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
48、ISO/IEC Directives, Part 2. A list of all parts in the IEC 61280 series, published under the general title Fibre optic communication subsystem test procedures, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability d
49、ate indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding o
