IEC 60728-113:2023

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

IEC 60728-113:2023 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 to about 3 300 MHz.
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 performance of the optical portion of the system defined in this document. This document describes RF transmission for fully digitalized broadcast and narrowcast (limited area distribution of broadcast) signals over FTTH, and introduces the xPON system as a physical layer media. The detailed description of the physical layer is out of scope of this document. The scope is limited to downstream RF video signal transmission over FTTH; IP transport technologies, such as IP Multicast and associate protocols, which require a two-way optical transmission system, are out of scope of this document.
Some interference effects occurring between the telecommunication system and the broadcast system are addressed in Clause 7.
IEC 60728-113:2023 cancels and replaces the first edition published in 2018 and IEC 60728-13-1:2017. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) IEC 60728-13-1, which deals with the bandwidth expansion for broadcast signal over FTTH systems, has been merged with this document;
b) a table containing the digital signal level at the system outlet has been added.

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 radiodiffusion soumis à une charge de porteuses exclusivement numériques

L'IEC 60728-113:2023 s'applique aux systèmes de transmission optique pour la transmission de signaux de radiodiffusion, 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 essentiellement destinés aux signaux de télévision et aux signaux de radiodiffusion sonore qui utilisent une technologie de transmission numérique. Le présent document spécifie les paramètres de base du système et les méthodes de mesurage 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 3 300 MHz environ.
La présente partie de l'IEC 60728 a pour objet de décrire les spécifications des systèmes des réseaux de desserte par fibre de l'abonné (DFA) pour la transmission de signaux de radiodiffusion à modulation numérique. Le présent document s'applique également à la transmission des signaux de radiodiffusion qui utilisent un réseau de télécommunication, si celui-ci respecte les performances de la portion optique du système défini dans le présent document. Le présent document décrit la transmission des signaux RF en tant que signaux de radiodiffusion générale et de radiodiffusion ciblée (distribution des signaux de radiodiffusion dans une zone limitée) entièrement numérisés sur les réseaux DFA et introduit le système xPON comme support de la couche physique. La description précise de la couche physique ne relève pas du domaine d'application du présent document. Le domaine d'application se limite à la transmission des signaux vidéo RF en aval sur les réseaux DFA; les technologies de transport par protocole Internet (IP), comme la multidiffusion IP et les protocoles associés, qui exigent un système de transmission optique bidirectionnelle, ne relèvent pas du domaine d'application du présent document.
Certains des effets de brouillage qui se produisent entre le système de télécommunication et le système de radiodiffusion sont traités à l'Article 7.
L'IEC 60728-113:2023 annule et remplace la première édition parue en 2018 et l'IEC 60728-13-1:2017. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) l'IEC 60728-13-1, qui traite de l'extension de la largeur de bande pour les signaux de diffusion sur les systèmes DFA, a été fusionnée avec le présent document;
b) un tableau qui indique le niveau du signal numérique au niveau de la prise d'abonné a été ajouté.

General Information

• Status: Published
• Publication Date: 30-May-2023
• ICS: 33.060.40 - Cabled distribution systems
• Technical Committee: TA 5 - Cable networks for television signals, sound signals and interactive services
• Drafting Committee: WG 5 - TC 100/TA 5/WG 5
• Current Stage: PPUB - Publication issued
• Start Date: 23-Jun-2023
• Completion Date: 31-May-2023

Relations

• Revises: 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
• Effective Date: 05-Sep-2023
• Replaces: IEC 60728-13-1:2017 - Cable networks for television signals, sound signals and interactive services - Part 13-1: Bandwidth expansion for broadcast signal over FTTH system
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60728-113
®

Edition 2.0 2023-05
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 radiodiffusion
soumis à une charge de porteuses exclusivement numériques
IEC 60728-113:2023-05(en-fr)

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IEC 60728-113

®


Edition 2.0 2023-05




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 radiodiffusion

soumis à une charge de porteuses exclusivement numériques











INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE





ICS 33.060.40  ISBN 978-2-8322-7054-7




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

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– 2 – IEC 60728-113:2023 © IEC 2023
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms, definitions, graphical symbols and abbreviated terms. 12
3.1 Terms and definitions . 12
3.2 Graphical symbols . 19
3.3 Abbreviated terms . 20
4 Optical system reference model . 21
4.1 Overview. 21
4.2 Over-all FTTH system reference model . 21
4.3 Reference models for the optical systems for broadcast signal transmissions . 24
4.3.1 Optical wavelength for FTTH system . 24
4.3.2 Reference models . 24
4.4 Specified performance points of the optical system . 25
5 Preparation of measurement . 25
5.1 Environmental conditions . 25
5.1.1 Standard measurement conditions . 25
5.1.2 Temperature and humidity . 26
5.1.3 Setting up the measuring setup and system under test . 26
5.1.4 AGC/ALC operation . 26
5.1.5 Impedance matching between pieces of equipment . 26
5.1.6 Standard operating condition . 26
5.1.7 Standard signal and measuring equipment . 26
5.2 Accuracy of measuring equipment . 27
5.3 Source power . 27
6 Methods of measurement . 27
6.1 Measuring points and items . 27
6.1.1 General . 27
6.1.2 Measuring points . 28
6.1.3 Measured parameters . 28
6.2 General measurement requirement . 29
6.2.1 General . 29
6.2.2 Input specification . 29
6.2.3 Standard measurement conditions . 29
6.2.4 Precautions for measurements . 30
6.3 Optical power . 30
6.3.1 General . 30
6.3.2 Measuring setup . 30
6.3.3 Measuring method . 31
6.3.4 Precautions for measurement . 31
6.3.5 Presentation of the results . 31
6.4 Optical wavelength. 32
6.4.1 Introduction . 32
6.4.2 Method of measurement . 32
6.4.3 Presentation of the results . 32

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IEC 60728-113:2023 © IEC 2023 – 3 –
6.5 SINR (signal-to-intermodulation and noise ratio) below 1GHz . 32
6.5.1 General . 32
6.5.2 Measuring setup . 33
6.5.3 Measuring conditions . 33
6.5.4 Precautions for measurement . 33
6.5.5 Presentation of the results . 34
6.6 Relative intensity noise (RIN) of optical signal . 34
6.6.1 General . 34
6.6.2 Measuring setup . 34
6.6.3 Measurement conditions . 35
6.6.4 System RIN measuring method . 35
6.6.5 SINR calculation based on RIN value . 37
6.6.6 Component RIN calculation . 37
6.6.7 Example for calculating of SINR . 39
6.7 Optical modulation index . 41
6.8 Signal-to-crosstalk ratio (SCR) . 41
6.8.1 General . 41
6.8.2 Equipment required . 41
6.8.3 General measurement requirements . 41
6.8.4 Procedure . 41
6.8.5 Potential sources of error . 42
6.8.6 Presentation of the results . 42
6.9 RF signal-to-intermodulation and noise ratio (SINR) of satellite broadcast
signals . 42
6.9.1 General . 42
6.9.2 Measuring setup . 43
6.9.3 Equipment required . 43
6.9.4 Measurement procedure . 43
6.9.5 Presentation of the results . 44
6.10 System BER (bit error ratio) . 44
6.10.1 Overview . 44
6.10.2 Connection of the equipment . 44
6.10.3 Measurement procedure . 45
6.10.4 Presentation of the results . 45
6.11 SINR versus BER measurement . 45
6.11.1 General . 45
6.11.2 Connection of the equipment . 45
6.11.3 Presentation of the results . 46
6.12 System noise margins . 47
6.12.1 General . 47
6.12.2 Connection of the equipment . 47
6.12.3 Measurement procedure . 48
6.12.4 Presentation of the results . 48
6.13 Modulation error ratio (MER) . 49
6.13.1 General . 49
6.13.2 Connection of the equipment . 49
6.13.3 Measurement procedure . 50
6.13.4 Presentation of the results . 50
6.14 In-band frequency characteristics between optical transmitter and V-ONU . 50

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– 4 – IEC 60728-113:2023 © IEC 2023
6.14.1 Overview . 50
6.14.2 Measurement setup . 50
6.14.3 Measuring method . 51
6.14.4 Presentation of the results . 51
7 Specification of the optical system for broadcast signal transmission . 52
7.1 Digital broadcast system over optical network . 52
7.2 RF signal levels at system outlet . 52
7.3 RF signal-to-intermodulation and noise ratio and performance allocation . 53
7.4 Relationship between RIN and SINR . 58
7.4.1 Type of broadcast services . 58
7.4.2 Types of broadcast services and relative signal level . 59
7.4.3 RIN performance requirements . 60
7.5 Optical wavelength. 62
7.6 Frequency of source signal . 63
7.7 Level difference between adjacent channels . 63
7.8 BER at headend input . 65
7.9 MER . 65
7.10 SINR specification for in-house and in-building wirings . 66
7.11 In-band frequency characteristics . 68
7.12 Electrical signal interference . 69
7.13 Crosstalk due to optical fibre non-linearity . 71
7.14 Interference due to intermodulation noise caused by fibre non-linearity . 72
7.15 Environmental conditions . 72
Annex A (informative) Actual service systems and design considerations . 73
A.1 General . 73
A.2 Multi-channel service system . 73
A.2.1 General . 73
A.2.2 Operating conditions . 74
A.2.3 Operating environment . 74
A.3 Re-transmission service system . 75
A.3.1 General . 75
A.3.2 Operating conditions . 75
A.3.3 Operating environment . 76
A.4 SINR calculation of optical network . 76
A.5 System reference model . 77
A.6 Hints for actual operation . 81
A.6.1 Optimum operation . 81
A.6.2 Key issues to be specified . 81
Annex B (informative) BER extrapolation method . 82
Annex C (informative) Optical system degradations . 84
C.1 System degradation factors . 84
C.2 Non-linear degradation . 85
C.2.1 Degradation factors . 85
C.2.2 Stimulated Brillouin scattering (SBS) . 85
C.2.3 Stimulated Raman scattering (SRS) . 86
C.2.4 Self-phase modulation (SPM) . 89
C.2.5 Cross-phase modulation (XPM) . 89

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IEC 60728-113:2023 © IEC 2023 – 5 –
Annex D (informative) Measurement of parameters (R, I , I and G) required for
d0 eq
RIN calculation . 90
D.1 Measurement of the responsivity (R) . 90
D.2 Measurement of dark current (I ) . 90
d0
D.3 Measurement of equivalent noise current density (I ) . 90
eq
D.4 Measurement of gain (G). 91
Annex E (informative) Measurement of peak and average signal levels of digitally
modulated signals . 92
E.1 General . 92
E.2 Peak and average power measurement using CCDF . 92
E.3 Measurement method of CCDF . 94
E.3.1 General . 94
E.3.2 Measurement procedure . 94
E.3.3 Estimation of BER from the CCDF measurement result . 95
E.3.4 Examples of CCDF measurements . 96
E.4 Performance evaluation of the FTTH system . 97
E.4.1 General . 97
E.4.2 Evaluation procedure . 97
E.5 Potential sources of error . 98
Annex F (informative) Clipping noise. 99
Annex G (informative) Relation between SINR degradation and rain attenuation . 100
G.1 Relation between SINR and G/T . 100
G.2 SINR degradation of satellite receiving system due to rain attenuation . 101
Bibliography . 102

Figure 1 – Example of FTTH system for television and sound signal . 23
Figure 2 – FTTH Cable TV system using one wavelength . 25
Figure 3 – FTTH Cable TV system using two wavelengths . 25
Figure 4 – Specified performance points of the optical system . 25
Figure 5 – Typical optical video distribution system . 28
Figure 6 – Test setup for optical power measurement using a wavelength filter . 30
Figure 7 – Test setup for optical power measuring using a WDM coupler . 31
Figure 8 – Measurement of optical wavelength without a WDM coupler . 32
Figure 9 – Measurement of optical wavelength using a WDM coupler . 32
Figure 10 – Test setup for RF signal to intermodulation and noise ratio measurement . 33
Figure 11 – Test setup for RIN measurement . 35
Figure 12 – Test setup for signal to crosstalk measurement . 41
Figure 13 – Setup for the measurement of SINR for satellite broadcast signals . 43
Figure 14 – Test setup for BER measurement . 44
Figure 15 – Test setup for SINR versus BER measurement procedure . 45
Figure 16 – Extrapolation method of BER measurement . 46
Figure 17 – Example of SINR versus BER characteristics . 47
Figure 18 – Test setup for system noise margin measurement . 48
Figure 19 – Example of system noise margin characteristics . 49
Figure 20 – Test setup for MER measurement . 49

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– 6 – IEC 60728-113:2023 © IEC 2023
Figure 21 – Example of result of MER measurement (64-QAM modulation format) . 50
Figure 22 – Setup for the measurement of in-band frequency characteristics . 51
Figure 23 – Measurement example of in-band frequency characteristics . 51
Figure 24 – Performance specified points . 52
Figure 25 – Permissible signal level of adjacent channels (ISDB-T, ISDB-C and
ISDB-C2) . 64
Figure 26 – Section SINR for SDU wiring (specified by electrical signal) . 67
Figure 27 – Section SINR for MDU wiring (specified by electrical signal) . 68
Figure 28 – Section SINR for MDU wiring (specified by optical signal) . 68
Figure 29 – Signal level difference with 3rd order interference signal (ISDB-T) . 69
Figure 30 – Signal level difference with 3rd order interference signal (ISDB-C 64QAM) . 70
Figure 31 – Signal level difference with 3rd order interference signal (ISDB-C 256QAM) . 70
Figure 32 – Level difference between signal and reflected (echo) signal (ISDB-T) . 70
Figure 33 – Level difference between signal and reflected (echo) signal
(ISDB‑C 64QAM) .
...