1、 IEC 60728-13-1 Edition 2.0 2017-07 INTERNATIONAL STANDARD Cable networks for television signals, sound signals and interactive services Part 13-1: Bandwidth expansion for broadcast signal over FTTH system IEC 60728-13-1:2017-07(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 201
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11、 sound signals and interactive services Part 13-1: Bandwidth expansion for broadcast signal over FTTH system INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.160.01; 33.180.01 ISBN 978-2-8322-4578-1 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obt
12、ained this publication from an authorized distributor. colour inside 2 IEC 60728-13-1:2017 IEC 2017 CONTENTS FOREWORD . 5 INTRODUCTION . 7 1 Scope 8 2 Normative references 8 3 Terms, definitions, symbols and abbreviated terms 8 3.1 Terms and definitions 8 3.2 Symbols 15 3.3 Abbreviated terms . 16 4
13、Overview . 18 5 Optical system reference model . 18 6 Preparation of measurement 20 6.1 Environmental conditions 20 6.1.1 Standard measurement conditions . 20 6.1.2 Standard operating condition . 20 6.1.3 Standard signal and measuring equipment 20 6.2 Accuracy of measuring equipment 21 6.3 Source po
14、wer 21 7 Methods of measurement 21 7.1 Measuring points 21 7.2 Measuring parameters 22 7.3 Optical power 23 7.4 Optical wavelength . 23 7.5 Signal level and signal-to-noise ratio. 23 7.5.1 General . 23 7.5.2 Measurement setup . 23 7.5.3 Measurement conditions 24 7.5.4 Measurement method for xPSK sig
15、nals 24 7.5.5 Presentation of the results . 24 7.6 RIN and signal-to-noise ratio . 24 7.6.1 General . 24 7.6.2 Measuring points and measurement setup . 25 7.6.3 Measurement conditions 25 7.6.4 System RIN measurement method . 26 7.6.5 S/N calculation based on RIN value 27 7.6.6 Calculation of compone
16、nt RIN 28 7.7 Optical modulation index . 29 7.8 Signal-to-crosstalk ratio (SCR) . 29 8 Specification of optical system for broadcast signal transmission 29 8.1 Digital broadcast system over optical network . 29 8.2 International TV systems. 29 8.3 Relationship between RIN and S/N 30 8.4 Optical wave
17、length . 32 8.5 Frequency of source signal . 33 8.6 Optical system specification for satellite signal transmission . 33 8.7 S/N ratio specification for in-house and in-building wirings 34 8.8 Crosstalk due to optical fibre non-linearity 35 IEC 60728-13-1:2017 IEC 2017 3 8.9 Single frequency interfer
18、ence level due to fibre non-linearity 35 8.10 Environment condition 35 Annex A (informative) Actual service systems and design considerations . 36 A.1 General . 36 A.2 Metropolitan type CATV 36 A.3 Municipal type CATV. 37 A.4 Poor signal reception type CATV 38 A.5 System reference model . 38 A.5.1 S
19、ystem parameters 38 A.5.2 Operating environment 39 A.6 Guidelines for actual operation . 47 A.6.1 Optical transmitter . 47 A.6.2 Optical amplifier 47 Annex B (informative) Wavelength division multiplexing 48 B.1 Optical wavelength grid (optical frequency grid) 48 B.2 Nominal central frequencies and
20、wavelengths . 48 B.3 Notes regarding wavelength division multiplexing . 50 B.3.1 Crosstalk between two wavelengths 50 B.3.2 Receiving two wavelengths by single V-ONU . 52 Annex C (informative) Minimum wavelength separation 54 C.1 Optical beat interference . 54 C.2 Range of wavelength variation 55 C.
21、3 WDM system using optical filters and couplers 56 Annex D (informative) Relation between S/N degradation and rain attenuation 59 Bibliography 61 Figure 1 FTTH Cable TV system using one-wavelength . 19 Figure 2 FTTH Cable TV system using two wavelengths 19 Figure 3 Performance specified points of th
22、e optical system 19 Figure 4 Measuring points in a typical video distribution system 22 Figure 5 Measurement of optical wavelength . 23 Figure 6 Measurement of signal level and signal-to-noise ratio 24 Figure 7 Measuring points in a typical FTTH system 25 Figure 8 RIN measurement setup . 25 Figure 9
23、 Performance allocation and measuring points 29 Figure 10 Section of S/N ratio specification (38 dB) for in-house wiring 34 Figure 11 Section of S/N ratio specification (24 dB) for in-building wiring (in case of coaxial cable distribution after V-ONU) . 35 Figure A.1 Example of a multi-channel servi
24、ce system of one million terminals 37 Figure A.2 Example of a multi-channel service system with 2 000 terminals . 37 Figure A.3 Example of a multi-channel with CS supplementary service system for 2 000 terminals . 37 Figure A.4 Example of a re-transmission service system with 72 terminals 38 Figure
25、A.5 Example of a re-transmission service system with 144 terminals 38 Figure A.6 System performance calculation for model A 41 Figure A.7 System performance calculation for model B 42 4 IEC 60728-13-1:2017 IEC 2017 Figure A.8 System performance calculation for model C 43 Figure A.9 System performanc
26、e calculation for model D 44 Figure A.10 System performance calculation for model E . 45 Figure A.11 System performance calculation for model F . 46 Figure B.1 Linear crosstalk between two wavelengths 51 Figure B.2 Wavelength dependency of Raman crosstalk 51 Figure B.3 Nonlinear crosstalk between tw
27、o wavelengths 52 Figure B.4 Frequency dependency of cross-phase modulation . 52 Figure B.5 S/N degradation (two wavelengths into one V-ONU case) . 53 Figure C.1 Experimental results of RIN degradation due to optical beat . 55 Figure C.2 Wavelength variation of a DWDM transmitter against ambient temp
28、erature . 56 Figure C.3 Wavelength variation of a CWDM transmitter against ambient temperature . 56 Figure C.4 Example of wavelength division multiplexing using WDM filter 57 Figure C.5 Example of CWDM filter design 57 Figure C.6 Example of wavelength division multiplexing using optical coupler . 58
29、 Table 1 Level of RF signals 13 Table 2 Measuring instruments 21 Table 3 Measuring points and measured parameters . 22 Table 4 Parameters used to calculate S/N when signals of multiple wavelengths are received by a single V-ONU 28 Table 5 Minimum RF signal-to-noise ratio requirements in operation 30
30、 Table 6 Types of broadcast services 31 Table 7 Type of service and minimum operational RIN values for satellite services 32 Table 8 performance of optical wavelength and power . 33 Table 9 Optical system specification 33 Table 10 Section of S/N ratio specification for in-house/in-building wiring .
31、34 Table 11 Interference level due to fibre non-linearity (single frequency interference) . 35 Table A.1 Basic system parameters (Japan) 39 Table B.1 Example nominal central frequencies of the DWDM grid 49 Table B.2 Nominal central wavelength for spacing of 20 nm (ITU-T G.694.2) . 50 IEC 60728-13-1:
32、2017 IEC 2017 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ CABLE NETWORKS FOR TELEVISION SIGNALS, SOUND SIGNALS AND INTERACTIVE SERVICES Part 13-1: Bandwidth expansion for broadcast signal over FTTH system FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization f
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43、C shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60728-13-1 has been prepared by technical area 5: Cable networks for television signals, sound signals and interactive services, of IEC technical committee 100: Audio, video and multimedia syste
44、ms and equipment. This second edition cancels and replaces the first edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition. Transmission frequency was expanded in order to achie
45、ve satellite signal for 4 K video service. The transmission frequency over FTTH would be 3 300 MHz. High signal modulation case like 16 APSK and 32 APSK was added in order to correspond to transmission for 4 K video service. 6 IEC 60728-13-1:2017 IEC 2017 The text of this International Standard is b
46、ased on the following documents: FDIS Report on voting 100/2927/FDIS 100/2959/RVD Full information on the voting for the approval of this International Standard can be found in the report on voting indicated in the above table. This document has been drafted in accordance with the ISO/IEC Directives
47、, Part 2. A list of all parts in the IEC 60728 series, published under the general title Cable networks for television signals, sound signals and interactive services, can be found on the IEC website. The committee has decided that the contents of this document will remain unchanged until the stabil
48、ity date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific document. At this date, the document will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. IMPORTANT The
49、 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 of its contents. Users should therefore print this document using a colour printer. IEC 60728-13-1:2017 IEC 2017 7 INTRODUCTION Standards and deliverables of the IEC 60728 series deal with cable networks including equipment and associated methods of measurement for
