IEC 60728-13-2010 Cable networks for television signals sound signals and interactive services - Part 13 Optical systems for broadcast signal transmissions《电视信号、声音信号和交互式服务用电缆网络.第13部分 广播信号传输用光学系统》.pdf

1、 IEC 60728-13 Edition 1.0 2010-01 INTERNATIONAL STANDARD Cable networks for television signals, sound signals and interactive services Part 13: Optical systems for broadcast signal transmissions IEC 60728-13:2010(E) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 IEC, Geneva, Sw

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9、0 2010-01 INTERNATIONAL STANDARD Cable networks for television signals, sound signals and interactive services Part 13: Optical systems for broadcast signal transmissions INTERNATIONAL ELECTROTECHNICAL COMMISSION XB ICS 33.160.01; 33.180.01 PRICE CODE ISBN 2-8318-1074-6 Registered trademark of the I

10、nternational Electrotechnical Commission colour inside 2 60728-13 IEC:2010(E) CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope.8 2 Normative references .8 3 Terms, definitions, symbols and abbreviations9 3.1 Terms and definitions 9 3.2 Symbols 15 3.3 Abbreviations 16 4 Optical system reference model17 5 P

11、reparation of measurement 19 5.1 Environmental conditions 19 5.1.1 Standard measurement conditions.19 5.1.2 Temperature and humidity .20 5.1.3 Setting up the measuring setup and system under test 20 5.1.4 AGC operation.20 5.1.5 Impedance matching between pieces of equipment .20 5.1.6 Standard operat

12、ing condition.20 5.1.7 Standard signal and measuring equipment 20 5.2 Accuracy of measuring equipment.21 5.3 Source power 21 6 Methods of measurement .21 6.1 Measuring points and items.21 6.1.1 General .21 6.1.2 Measuring points .21 6.1.3 Measured parameters21 6.2 Optical power 22 6.2.1 General .22

13、6.2.2 Measuring setup22 6.2.3 Measuring method.23 6.2.4 Precaution for measurement23 6.2.5 Presentation of the results.24 6.3 Carrier level and carrier-to-noise ratio .24 6.3.1 General .24 6.3.2 Measuring setup24 6.3.3 Measuring conditions.24 6.3.4 Measuring method for analogue signals (AM-VSB) 24 6

14、.3.5 Measuring method for digitally modulated signals (64 QAM, OFDM)25 6.3.6 Precautions for measurement 25 6.3.7 Presentation of the results.25 6.4 Carrier-to-noise ratio defined by optical signal.25 6.4.1 General .25 6.4.2 Measuring setup26 6.4.3 Measuring conditions.27 6.4.4 System RIN measuring

15、method27 6.4.5 C/N calculation based on RIN value.29 6.4.6 Component RIN calculation .29 60728-13 IEC:2010(E) 3 6.5 Optical modulation index .31 6.6 Carrier-to-crosstalk ratio (CCR).31 6.6.1 General .31 6.6.2 Equipment .31 6.6.3 General measurements .32 6.6.4 Procedure32 6.6.5 Potential sources of e

16、rror 33 6.6.6 Presentation of the results.33 7 Specification of optical system for broadcast signal transmission .33 7.1 Analogue and digital broadcast system over optical network .33 7.2 International TV systems.34 7.3 Relationship between RIN and C/N35 7.4 Optical wavelength36 7.5 Frequency of sou

17、rce signal .36 7.6 Optical system specification for broadcast signal transmission 36 7.7 C/N ratio specification for in-house and in-building wirings 37 7.8 Crosstalk due to optical fibre non-linearity.39 7.9 Single frequency interference level due to fibre non-linearity.40 7.10 Environmental condit

18、ions 40 Annex A (informative) Actual service systems and design considerations 41 Annex B (informative) Optical system overview56 Annex C (informative) Optical system degradations .60 Annex D (normative) Measurement of parameters (R, I d0 , I eqand G) required for RIN calculation 66 Bibliography68 F

19、igure 1 Optical system reference model for one-fibre solution 18 Figure 2 Optical system reference model for two-fibres solution.18 Figure 3 Example of PON triplexer.19 Figure 4 Performance specified points of the optical system 19 Figure 5 Typical optical video distribution system.21 Figure 6 Measu

20、rement of optical power using a WDM coupler .23 Figure 7 Measurement of optical power using a wavelength filter.23 Figure 8 Arrangement of test equipment for carrier-to-noise ratio measurement.24 Figure 9 Measuring points in the optical cable TV network.26 Figure 10 RIN measurement setup.27 Figure 1

21、1 Arrangement of test equipment for measuring other services crosstalk.32 Figure 12 Performance allocation and measuring points 33 Figure 13 Section of C/N ratio specification (45 dB) for in-house wiring (specified for electrical signals)38 Figure 14 Section of C/N ratio specification for in-house w

22、iring (specified for optical signals).39 Figure A.1 Example of a multi-channel service system of one million terminals41 Figure A.2 Example of a multi-channel service system of 2 000 terminals 42 Figure A.3 Example of re-transmission service system of 72 terminals.43 Figure A.4 Example of re-transmi

23、ssion service system of 144 terminals.43 4 60728-13 IEC:2010(E) Figure A.5 Model No.1 of a system performance calculation 47 Figure A.6 Model No.2 of a system performance calculation 48 Figure A.7 Model No.3 a of system performance calculation 49 Figure A.8 Model No.4 of a system performance calcula

24、tion 50 Figure A.9 Model No.5 of a system performance calculation 51 Figure A.10 Model No.6 of a system performance calculation 52 Figure A.11 Model No.7 of system performance calculation .53 Figure B.1 Topology of optical system .56 Figure B.2 Network composition.57 Figure B.3 Example of SS system5

25、8 Figure B.4 Example of ADS system58 Figure B.5 Example of PON system .59 Figure C.1 Reflection model.60 Figure C.2 Degradation factors of optical transmission system.61 Figure C.3 SBS generation image61 Figure C.4 Interference between two wavelengths .63 Figure C.5 Simulation of SRS(OLT transmissio

26、n power versus D/U) 63 Figure C.6 Simulation of SRS (D/U in arbitrary unit versus fibre length) .64 Figure C.7 Fibre length of the first peak of SRS D/U versus frequency.64 Figure C.8 GE-PON idle pattern spectrum (IEEE 802.3ah 1000Base-PX) (62,5 MHz = 1 250 Mbps/20 bit)65 Figure D.1 Measurement of g

27、ain (G) 67 Table 1 Level of RF signals12 Table 2 Measuring instruments 20 Table 3 Measuring points and measured parameters .22 Table 4 Parameters used for the calculation of carrier-to-noise ratio (C/N).30 Table 5 Minimum C/N requirements in operation34 Table 6 Minimum RF signal-to-noise ratio requi

28、rements in operation34 Table 7 Types of broadcast services36 Table 8 Type of service and minimum operational RIN values36 Table 9 Optical system specification 37 Table 10 Section of C/N ratio specification for in-house/in-building wiring38 Table 11 Interference level due to fibre non-linearity40 Tab

29、le 12 Environmental conditions 40 Table A.1 Operating conditions of a multi-channel service system .42 Table A.2 Operating conditions of re-transmission service system .43 Table A.3 Basic system parameters for multi-channel and re-transmission service systems 45 Table A.4 Verified optimum operation

30、54 Table B.1 PON systems and main parameters .59 Table C.1 Disturbance parameter of Raman crosstalk62 60728-13 IEC:2010(E) 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ CABLE NETWORKS FOR TELEVISION SIGNALS, SOUND SIGNALS AND INTERACTIVE SERVICES Part 13: Optical systems for broadcast signal transmi

31、ssions 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 concerning standardization

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38、ssment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, empl

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40、e 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

41、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 60728-13 has been prepared by technical area 5: Cable networks for television signals, sound

42、signals and interactive services, of IEC technical committee 100: Audio, video and multimedia systems and equipment. The text of this standard is based on the following documents: FDIS Report on voting 100/1623/FDIS 100/1646/RVD Full information on the voting for the approval of this standard can be

43、 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. 6 60728-13 IEC:2010(E) The list of all the parts of the IEC 60728 series, under the general title Cable networks for television signals, sound signals and

44、 interactive services, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, t

45、he publication 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 colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful

46、 for the correct understanding of its contents. Users should therefore print this document using a colour printer. 60728-13 IEC:2010(E) 7 INTRODUCTION Standards of the IEC 60728 series deal with cable networks including equipment and associated methods of measurement for headend reception, processin

47、g and distribution of television signals, sound signals and their associated data signals and for processing, interfacing and transmitting all kinds of signals for interactive services using all applicable transmission media. This includes CATV 0 1 -networks; MATV-networks and SMATV-networks; indivi

48、dual receiving networks; and all kinds of equipment, systems and installations installed in such networks. The extent of this standardization work is from the antennas and/or special signal source inputs to the headend or other interface points to the network up to the terminal input. The standardiz

49、ation of any user terminals (i.e., tuners, receivers, decoders, multimedia terminals, etc.) as well as of any coaxial, balanced and optical cables and accessories thereof is excluded. 1 This word encompasses the HFC (Hybrid Fibre Cable) networks used nowadays to provide telecommunications services, voice, data, audio and video both broadcast and narrowcast. 8 60728-13 IE