Cable networks for television signals, sound signals and interactive services - Part 113: Optical systems for broadcast signal transmissions loaded with digital channels only

IEC 60728-113:2018 is applicable to optical transmission systems for broadcast signal transmission that consist of headend equipment, optical transmission lines, in-house wirings and system outlets. These systems are primarily intended for television and sound signals using digital transmission technology. This document specifies the basic system parameters and methods of measurement for optical distribution systems between headend equipment and system outlets in order to assess the system performance and its performance limits.
In this document, the upper signal frequency is limited at about 1 000 MHz. For systems requiring more bandwidth, refer to IEC 60728-13-1.
The purpose of this part of IEC 60728 is to describe the system specifications of FTTH (fibre to the home) networks for digitally modulated broadcast signal transmission. This document is also applicable to broadcast signal transmission using a telecommunication network if it satisfies the optical portion of this document. This document describes RF transmission for fully digitalized broadcast and narrowcast (limited area distribution of broadcast) signals over FTTH, and introduces xPON system as a physical layer media. The detailed description of the physical layer is out of the scope of this document. The scope is limited to RF signal transmission over FTTH, thus, it does not include IP transport technologies, such as IP Multicast and associate protocols.
Some interference descriptions between the telecommunication system and the broadcast system are addressed in Clause 7.

Réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonore et services interactifs - Partie 113 : Systèmes optiques pour transmissions de signaux radiodiffusés soumis à une charge de porteuses exclusivement numériques

IEC 60728-113:2018 s'applique aux systèmes de transmission optique pour la transmission de signaux de diffusion, qui se composent de l'équipement de la tête de réseau, des lignes de transmission optique, des câblages internes et des prises d'abonnés. Ces systèmes sont principalement prévus pour la télévision et les signaux sonores utilisant une technologie de transmission numérique. Le présent document spécifie les paramètres de base du système et les méthodes de mesure des systèmes de distribution optique entre l'équipement de la tête de réseau et les prises d'abonnés, afin d'évaluer les performances du système et ses limites de performances.
Dans le présent document, la fréquence supérieure du signal est limitée à 1 000 MHz environ. Se reporter à l'IEC 60728-13-1 pour les systèmes qui exigent davantage de bande passante.
La présente partie de l'IEC 60728 a pour objet la description des spécifications des systèmes des réseaux de desserte par fibre de l'abonné (DFA) pour la transmission de signaux de diffusion à modulation numérique. Le présent document s'applique également à la transmission des signaux de diffusion utilisant un réseau de télécommunication, si celui-ci respecte la portion du présent document consacrée à l'optique. Le présent document décrit la transmission de signaux radiofréquence en tant que signaux de diffusion générale et de diffusion ciblée (distribution de la diffusion dans une zone limitée) entièrement numérisés sur le réseau de desserte par fibre de l'abonné et introduit le système xPON comme support de la couche physique. La description précise de la couche physique ne fait pas partie du domaine d'application du présent document. Le domaine d'application se limitant à la transmission des signaux RF sur les réseaux de desserte par fibre de l'abonné, les technologies de transport par protocole Internet (IP), comme la multidiffusion IP et les protocoles associés, ne sont donc pas incluses.
Certaines descriptions des interférences entre le système de télécommunication et le système de diffusion sont couvertes par l'Article 7.

General Information

Status
Published
Publication Date
09-Jul-2018
Current Stage
PPUB - Publication issued
Completion Date
10-Jul-2018
Ref Project

Buy Standard

Standard
IEC 60728-113:2018 - Cable networks for television signals, sound signals and interactive services - Part 113: Optical systems for broadcast signal transmissions loaded with digital channels only
English and French language
190 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

IEC 60728-113
Edition 1.0 2018-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable networks for television signals, sound signals and interactive services –
Part 113: Optical systems for broadcast signal transmissions loaded with digital
channels only
Réseaux de distribution par câbles pour signaux de télévision, signaux de
radiodiffusion sonore et services interactifs –
Partie 113: Systèmes optiques pour la transmission de signaux de diffusion
soumis à une charge de porteuses exclusivement numériques
IEC 660728-113:2018-07(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2018 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC

copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite

ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez

les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC

The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes

International Standards for all electrical, electronic and related technologies.
About IEC publications

The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the

latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org

The stand-alone application for consulting the entire The world's leading online dictionary of electronic and

bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in

Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional

documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical

iPad. Vocabulary (IEV) online.

IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary

The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and

variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of

committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been

and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc

details all new publications released. Available online and If you wish to give us your feedback on this publication or

also once a month by email. need further assistance, please contact the Customer Service

Centre: sales@iec.ch.
A propos de l'IEC

La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des

Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC

Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la

plus récente, un corrigendum ou amendement peut avoir été publié.
Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 21 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 16
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.
Recherche de publications IEC -
Glossaire IEC - std.iec.ch/glossary
webstore.iec.ch/advsearchform
67 000 entrées terminologiques électrotechniques, en anglais

La recherche avancée permet de trouver des publications IEC et en français, extraites des articles Termes et Définitions des

en utilisant différents critères (numéro de référence, texte, publications IEC parues depuis 2002. Plus certaines entrées

comité d’études,…). Elle donne aussi des informations sur les antérieures extraites des publications des CE 37, 77, 86 et

projets et les publications remplacées ou retirées. CISPR de l'IEC.

IEC Just Published - webstore.iec.ch/justpublished Service Clients - webstore.iec.ch/csc

Restez informé sur les nouvelles publications IEC. Just Si vous désirez nous donner des commentaires sur cette

Published détaille les nouvelles publications parues. publication ou si vous avez des questions contactez-nous:

Disponible en ligne et aussi une fois par mois par email. sales@iec.ch.
---------------------- Page: 2 ----------------------
IEC 60728-113
Edition 1.0 2018-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable networks for television signals, sound signals and interactive services –
Part 113: Optical systems for broadcast signal transmissions loaded with digital
channels only
Réseaux de distribution par câbles pour signaux de télévision, signaux de
radiodiffusion sonore et services interactifs –
Partie 113: Systèmes optiques pour la transmission de signaux de diffusion
soumis à une charge de porteuses exclusivement numériques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.060.40 ISBN 978-2-8322-6337-2

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 agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 60728-113:2018 © IEC 2018
CONTENTS

FOREWORD......................................................................................................................... 7

INTRODUCTION ................................................................................................................... 9

1 Scope .......................................................................................................................... 10

2 Normative references .................................................................................................. 10

3 Terms, definitions, graphical symbols and abbreviated terms ........................................ 11

3.1 Terms and definitions .......................................................................................... 11

3.2 Graphical symbols ............................................................................................... 16

3.3 Abbreviated terms ............................................................................................... 17

4 Optical system reference model ................................................................................... 19

5 Preparation of measurement ........................................................................................ 21

5.1 Environmental conditions .................................................................................... 21

5.1.1 Standard measurement conditions ................................................................ 21

5.1.2 Temperature and humidity ............................................................................ 21

5.1.3 Setting up the measuring setup and system under test .................................. 21

5.1.4 AGC/ALC operation ...................................................................................... 21

5.1.5 Impedance matching between pieces of equipment ....................................... 21

5.1.6 Standard operating condition ........................................................................ 21

5.1.7 Standard signal and measuring equipment ................................................... 22

5.2 Accuracy of measuring equipment ....................................................................... 22

5.3 Source power ...................................................................................................... 22

6 Methods of measurement ............................................................................................. 22

6.1 Measuring points and items ................................................................................. 22

6.1.1 General ....................................................................................................... 22

6.1.2 Measuring points .......................................................................................... 22

6.1.3 Measured parameters .................................................................................. 22

6.2 Optical power ...................................................................................................... 24

6.2.1 Introduction .................................................................................................. 24

6.2.2 Measuring setup .......................................................................................... 24

6.2.3 Measuring method ....................................................................................... 24

6.2.4 Precautions for measurement ....................................................................... 25

6.2.5 Presentation of the results ............................................................................ 25

6.3 Signal level and RF signal to intermodulation and noise ratio S/IN ........................ 25

6.3.1 General ....................................................................................................... 25

6.3.2 Measuring setup .......................................................................................... 25

6.3.3 Measuring conditions ................................................................................... 26

6.3.4 Precautions for measurement ....................................................................... 26

6.3.5 Presentation of the results ............................................................................ 27

6.4 Signal-to-noise ratio of optical signals.................................................................. 27

6.4.1 General ....................................................................................................... 27

6.4.2 Measuring setup .......................................................................................... 27

6.4.3 Measurement conditions .............................................................................. 28

6.4.4 System RIN measuring method .................................................................... 28

6.4.5 S/N calculation based on RIN value .............................................................. 29

6.4.6 Component RIN calculation .......................................................................... 30

6.4.7 Example for calculating signal-to-noise ratio S/N .......................................... 31

6.5 Optical modulation index ..................................................................................... 32

---------------------- Page: 4 ----------------------
IEC 60728-113:2018 © IEC 2018 – 3 –

6.6 Signal-to-crosstalk ratio (SCR) ............................................................................ 32

6.6.1 General ....................................................................................................... 32

6.6.2 Equipment required ...................................................................................... 32

6.6.3 General measurement requirements ............................................................. 33

6.6.4 Procedure .................................................................................................... 33

6.6.5 Potential sources of error ............................................................................. 34

6.6.6 Presentation of the results ............................................................................ 34

6.7 RF signal-to-intermodulation and noise ratio S/IN ................................................ 34

6.7.1 General ....................................................................................................... 34

6.7.2 Equipment required ...................................................................................... 34

6.7.3 Connection of the equipment ........................................................................ 35

6.7.4 Measurement procedure ............................................................................... 35

6.7.5 Presentation of the results ............................................................................ 36

6.8 Bit error ratio (BER) ............................................................................................ 36

6.8.1 General ....................................................................................................... 36

6.8.2 Connection of the equipment ........................................................................ 36

6.8.3 Measurement procedure ............................................................................... 37

6.8.4 Presentation of the results ............................................................................ 37

6.9 BER versus S/N .................................................................................................. 37

6.9.1 General ....................................................................................................... 37

6.9.2 Connection of the equipment ........................................................................ 37

6.9.3 Measurement procedure ............................................................................... 38

6.9.4 Presentation of the results ............................................................................ 38

6.10 System noise margins ......................................................................................... 39

6.10.1 General ....................................................................................................... 39

6.10.2 Connection of the equipment ........................................................................ 39

6.10.3 Measurement procedure ............................................................................... 40

6.10.4 Presentation of the results ............................................................................ 40

6.11 Modulation error ratio (MER) ............................................................................... 41

6.11.1 General ....................................................................................................... 41

6.11.2 Connection of the equipment ........................................................................ 41

6.11.3 Measurement procedure ............................................................................... 42

6.11.4 Presentation of the results ............................................................................ 42

7 Specification of the optical system for broadcast signal transmission ............................ 42

7.1 Digital broadcast system over optical network ...................................................... 42

7.2 Relationship between RIN and S/N ...................................................................... 46

7.3 Optical wavelength .............................................................................................. 48

7.4 Frequency of source signal .................................................................................. 48

7.5 Level difference between adjacent channels ........................................................ 48

7.6 BER at headend input ......................................................................................... 50

7.7 MER ................................................................................................................... 50

7.8 S/N specification for in-house and in-building wirings ........................................... 50

7.9 Electrical signal interference................................................................................ 51

7.10 Crosstalk due to optical fibre non-linearity ........................................................... 55

7.11 Interference due to intermodulation noise caused by fibre non-linearity ................ 55

7.12 Environmental conditions .................................................................................... 56

Annex A (informative) Actual service systems and design considerations ............................ 57

A.1 General ............................................................................................................... 57

A.2 Multi-channel service system ............................................................................... 57

---------------------- Page: 5 ----------------------
– 4 – IEC 60728-113:2018 © IEC 2018

A.2.1 General ....................................................................................................... 57

A.2.2 Operating conditions .................................................................................... 58

A.2.3 Operating environment ................................................................................. 58

A.3 Re-transmission service system .......................................................................... 59

A.3.1 General ....................................................................................................... 59

A.3.2 Operating conditions .................................................................................... 59

A.3.3 Operating environment ................................................................................. 60

A.4 S/N ratio calculation of optical network ................................................................ 60

A.5 System reference model ...................................................................................... 61

A.6 Hints for actual operation .................................................................................... 64

A.6.1 Optimum operation ....................................................................................... 64

A.6.2 Key issues to be specified ............................................................................ 65

Annex B (informative) BER extrapolation method ................................................................ 66

Annex C (informative) Optical system degradations ............................................................ 68

C.1 System degradation factors ................................................................................. 68

C.2 Non-linear degradation ........................................................................................ 69

C.2.1 Degradation factors ...................................................................................... 69

C.2.2 Stimulated Brillouin scattering (SBS) ............................................................ 69

C.2.3 Stimulated Raman scattering (SRS).............................................................. 70

C.2.4 Self-phase modulation (SPM) ....................................................................... 73

C.2.5 Cross-phase modulation (XPM) .................................................................... 73

Annex D (informative) Measurement of parameters (R, I , I and G) required for
d0 eq

RIN calculation ............................................................................................................ 74

D.1 Measurement of the responsivity (R) .................................................................... 74

D.2 Measurement of dark current (I ) ....................................................................... 74

D.3 Measurement of equivalent noise current density (I ) ......................................... 74

D.4 Measurement of gain (G) ..................................................................................... 75

Annex E (informative) Measurement of peak and average signal levels of digitally

modulated signals ........................................................................................................ 76

E.1 General ............................................................................................................... 76

E.2 Peak and average power measurement using CCDF ............................................ 76

E.3 Measurement method of CCDF ............................................................................ 78

E.3.1 General ....................................................................................................... 78

E.3.2 Measurement procedure ............................................................................... 78

E.3.3 Estimation of BER from the CCDF measurement result ................................. 78

E.3.4 Examples of CCDF measurements ............................................................... 80

E.4 Performance evaluation of the FTTH system ........................................................ 81

E.4.1 General ....................................................................................................... 81

E.4.2 Evaluation procedure ................................................................................... 81

E.5 Potential sources of error .................................................................................... 82

Annex F (informative) Clipping noise .................................................................................. 83

Bibliography ....................................................................................................................... 84

Figure 1 – Example of FTTH system for television and sound signal .................................... 20

Figure 2 – Points of performance specification of the FTTH system ...................................... 21

Figure 3 – Typical optical video distribution system ............................................................. 23

Figure 4 – Test set-up for optical power measurement using a wavelength filter ................... 24

Figure 5 – Test set-up for optical power measurement using a WDM coupler ....................... 24

---------------------- Page: 6 ----------------------
IEC 60728-113:2018 © IEC 2018 – 5 –

Figure 6 – Test setup for RF signal to intermodulation and noise ratio measurement ............ 26

Figure 7 – Measuring points in the optical cable TV network ................................................ 27

Figure 8 – Test setup for RIN measurement ........................................................................ 28

Figure 9 – Test setup for signal to crosstalk measurement ................................................... 33

Figure 10 – Test setup for BER measurement ..................................................................... 37

Figure 11 – Test setup for BER versus S/N measurement .................................................... 37

Figure 12 – Extrapolation method of BER measurement ...................................................... 38

Figure 13 – Example of BER versus S/N characteristics ...................................................... 39

Figure 14 – Test setup for system noise margin measurement ............................................. 40

Figure 15 – Example of system noise margin characteristics ................................................ 41

Figure 16 – Test setup for MER measurement ..................................................................... 41

Figure 17 – Example of result of MER measurement (64 QAM modulation format) ................ 42

Figure 18 – Performance specified points ............................................................................ 43

Figure 19 – Permissible signal level of adjacent channels (in the case of Japan) .................. 49

Figure 20 – Section S/N for MDU wiring (specified by electrical signal) ................................ 51

Figure 21 – Section S/N for MDU wiring (specified by optical signal) .................................... 51

Figure 22 – Signal level difference with 3 order interference signal (ISDB-T) ..................... 52

Figure 23 – Level difference between signal and reflected (echo) signal (ISDB-T) ................ 53

Figure 24 – Signal level difference with 3 order interference signal (ISDB-C 64 QAM) ....... 53

Figure 25 – Signal level difference with 3 order interference signal (ISDB-C 256 QAM)

54

Figure 26 – Level difference between signal and reflected (echo) signal (ISDB-C 64

QAM, ISDB-C2 256 QAM to 4 096 QAM) ............................................................................. 54

Figure 27 – Level difference between signal and reflected (echo) signal (ISDB-C 256

QAM) ................................................................................................................................. 55

Figure A.1 – Example of a multi-channel service system of one million terminals .................. 57

Figure A.2 – Example of a multi-channel service system of 2 000 terminals .......................... 58

Figure A.3 – Example of re-transmission service system of 72 terminals .............................. 59

Figure A.4 – Example of re-transmission service system of 144 terminals ............................ 59

Figure A.5 – Model 1 system performance calculation .......................................................... 63

Figure A.6 – Model 4 system performance calculation .......................................................... 64

Figure B.1 – Extrapolation method of BER measurement ..................................................... 66

Figure B.2 – BER characteristics for 256 QAM, 1 024 QAM and 4 096 QAM

(Extrapolation method) ........................................................................................................ 67

Figure C.1 – Reflection model ............................................................................................. 68

Figure C.2 – Degradation factors of optical transmission system .......................................... 69

Figure C.3 – SBS generation image .................................................................................... 69

Figure C.4 – Interference between two wavelengths ............................................................ 71

Figure C.5 – Simulation of SRS (OLT transmission power versus D/U) ................................. 71

Figure C.6 – Simulation of SRS (D/U in arbitrary unit versus fibre length) ............................. 72

Figure C.7 – Fibre length of the first peak of SRS D/U versus frequency .............................. 72

Figure C.8 – GE-PON idle pattern spectrum (ISO/IEC/IEEE 8802-3:2017 1 000 Base-

PX) (62,5 MHz = 1 250 Mbps/20 bit) .................................................................................... 73

Figure D.1 – Measurement of gain (G) ................................................................................. 75

Figure E.1 – Typical CCDF curves for OFDM and M-QAM signals ........................................ 77

---------------------- Page: 7 ----------------------
– 6 – IEC 60728-113:2018 © IEC 2018

Figure E.2 – CCDF measurement setup .............................................................................. 78

Figure E.3 – CCDF measurement example .......................................................................... 79

Figure E.4 – SER vs S/N performance in an AWGN channel ................................................ 80

Figure E.5 – Example of CCDF measurements .................................................................... 80

Figure E.6 – Performance evaluation of digital optical signals in the FTTH system ............... 81

Figure E.7 – CCDF measurement bandwidth ....................................................................... 81

Figure F.1 – Clipping effects in laser diode static curve (IL curve) ........................................ 83

Figure F.2 – Clipping noise, zero span, sweeping time is 100 µs .......................................... 83

Table 1 – Level of RF signals .............................................................................................. 14

Table 2 – Optical wavelength for FTTH system .................................................................... 19

Table 3 – Frequency range ..............
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.