1、 IEC 60728-14 Edition 1.0 2014-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Cable networks for television signals, sound signals and interactive services Part 14: Optical transmission systems using RFoG technology Rseaux de distribution par cbles pour signaux de tlvision, signaux de radiodiffusion
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20、AL STANDARD NORME INTERNATIONALE Cable networks for television signals, sound signals and interactive services Part 14: Optical transmission systems using RFoG technology Rseaux de distribution par cbles pour signaux de tlvision, signaux de radiodiffusion sonore et services interactifs Partie 14: Sy
21、stmes de transmission optique appliquant la technologie RFoG INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XA ICS 33.060.40; 33.160; 33.180 PRICE CODE CODE PRIX ISBN 978-2-8322-1439-8 Registered trademark of the International Electrotechnical Commission Marque
22、dpose de la Commission Electrotechnique Internationale 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. 2 IEC 60728-14:2014 IEC 2014 CONTENTS FOREWORD . 5 INTRODUCTIO
23、N . 7 1 Scope 8 2 Normative references . 8 3 Terms, definitions, symbols and abbreviations 10 3.1 Terms and definitions . 10 3.2 Symbols . 16 3.3 Abbreviations . 16 4 System reference model 17 5 RFoG ONU reference architecture . 18 6 Method of measurements . 19 6.1 Optical power . 19 6.2 Centroidal
24、wavelength and spectral width under modulation 19 6.3 Optical wavelength . 20 6.4 Linewidth and chirping of transmitters with single mode lasers 20 6.5 Optical modulation index 20 6.6 Reference output level of an optical receiver. 20 6.7 Noise parameters of optical transmitters and optical receivers
25、 20 6.8 Relative intensity noise (RIN), optical modulation index and equivalent input noise current (EINC) 20 6.9 Carrier level and carrier-to-noise ratio 20 6.10 Noise power ratio (NPR) . 20 6.11 Carrier-to-noise ratio defined by optical signal 21 6.12 Carrier-to-crosstalk ratio (CCR) 21 7 System p
26、erformance requirements . 21 7.1 Digital data system . 21 7.1.1 ODN . 21 7.1.2 Performance allocation . 21 7.2 Forward path and return path frequency split 22 8 RFoG equipment specifications 22 8.1 General specifications 22 8.1.1 Safety . 22 8.1.2 Electromagnetic compatibility (EMC) . 22 8.1.3 Envir
27、onmental conditions 22 8.1.4 Marking 23 8.2 R-ONU . 23 8.2.1 Indicators 23 8.2.2 R-ONU forward path receiver specifications 23 8.2.3 Return path performance of R-ONU 25 8.2.4 Remote control functions 29 8.3 Headend specifications 34 8.3.1 Headend forward path specifications . 34 8.3.2 Headend return
28、 path specifications: R-RRX . 34 IEC 60728-14:2014 IEC 2014 3 Annex A (informative) Implementation notes . 36 Annex B (informative) System loss specification . 38 B.1 General 38 B.2 Forward path considerations . 38 B.3 Return path considerations . 39 Annex C (informative) Optical beat interference 4
29、2 C.1 General 42 C.2 Operating conditions of ODN 42 C.3 Operating conditions of optical receiver at the headend system. 42 C.4 Operating conditions of CMTS 43 C.5 Environmental conditions 43 C.6 Relation between optical transmission loss and OMI . 43 C.7 Design margin of ODN . 44 C.8 Example of syst
30、em design 45 C.9 Method of measurement of OBI 46 C.9.1 Purpose 46 C.9.2 Measurement setup 46 C.9.3 Example of measurement conditions . 46 C.9.4 Procedure . 47 C.9.5 Presentation of results 47 C.10 Method of measurement of OBI (measurement with CW signals) 47 C.10.1 Purpose 47 C.10.2 Measurement setu
31、p 47 C.10.3 Procedure . 48 Annex D (normative) Optional remote control manager . 49 Annex E (informative) Outdoor housings for R-ONU protection . 50 Annex F (informative) Effect of off-state optical power on C/N ratio of transmission signal. 51 Bibliography 53 Figure 1 Optical system reference model
32、 for RFoG . 18 Figure 2 Principle schematics of R-ONU . 19 Figure 3 Measurement of optical wavelength using WDM coupler . 20 Figure 4 R-ONU turn-on and turn-off diagram . 29 Figure 5 Example of the remote control system configuration 30 Figure 6 Data format 31 Figure 7 Structure of data packet 31 Fi
33、gure 8 Control transfer process . 32 Figure 9 Timing of data transmission 32 Figure A.1 Placement of attenuators when system loss is too low . 37 Figure B.1 Performance allocation of the return path transmission system 39 Figure B.2 Section C/N specification for SDU and MDU in-house wiring. 41 Figur
34、e C.1 Optical transmission loss and OMI . 44 Figure C.2 ODN design margin . 44 Figure C.3 Setup used for the measurement of OBI 46 4 IEC 60728-14:2014 IEC 2014 Figure C.4 Setup used for the measurement of OBI (CW method). 48 Table 1 ODN Specifications 21 Table 2 RF frequencies 22 Table 3 Classificat
35、ion of R-ONU optical receivers . 24 Table 4 Data publication requirements for R-ONU optical receivers. 24 Table 5 Recommendations for R-ONU optical receivers 24 Table 6 Performance requirements for R-ONU optical receivers 25 Table 7 Classes of optical return path transmitters . 25 Table 8 Data publi
36、cation requirements for optical return path transmitters . 26 Table 9 Performance requirements for optical parameters and interfaces 26 Table 10 Electrical properties requirements for R-ONU optical return path transmitters . 27 Table 11 R-ONU turn-on and turn-off specifications 27 Table 12 Remote co
37、ntrol items . 30 Table 13 Fundamental specification of data communication 31 Table 14 Content of data packets . 31 Table 15 R-ONU address . 32 Table 16 Recommendation for timing of data transmission 33 Table 17 Remote control command codes 33 Table 18 Specification of modulation for the remote contr
38、ol signal 34 Table 19 Data publication requirements for return path optical receivers . 35 Table 20 Performance requirements for optical return path receivers 35 Table C.1 Operating conditions related to ODN parameters 42 Table C.2 Operating conditions related to ODN parameters 43 Table C.3 Environm
39、ental conditions for system evaluation 43 Table C.4 Factors affecting the transmission loss of ODN . 45 Table C.5 System design example 1 . 45 Table C.6 System design example 2 . 45 Table C.7 Example of list of measurement conditions . 46 Table C.8 Presentation of OBI measurement results . 47 Table
40、C.9 Presentation of OBI measurement results . 48 Table D.1 Performance requirements for the FSK transmitter . 49 IEC 60728-14:2014 IEC 2014 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ CABLE NETWORKS FOR TELEVISION SIGNALS, SOUND SIGNALS AND INTERACTIVE SERVICES Part 14: Optical transmission system
41、s using RFoG technology FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concernin
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