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: 31-May-2023
• Completion Date: 23-Jun-2023

Relations

• 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
• Replaces: IEC 60728-13-1:2017/COR1:2017 - Corrigendum 1 - 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
• Revises: IEC 60728-113:2018/COR1:2018 - Corrigendum 1 - 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
• 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

Overview

IEC 60728-113:2023 is an international standard developed by the International Electrotechnical Commission (IEC) that addresses optical systems used for broadcast signal transmission loaded solely with digital channels. This standard focuses on cable networks that distribute television and sound signals, along with interactive services, particularly through fiber-to-the-home (FTTH) infrastructure. It defines essential system parameters, measurement methods, and performance criteria for reliable digital broadcast transmissions over optical fiber networks. The scope includes headend equipment, optical transmission lines, in-house wiring, and system outlets, with a frequency upper limit of approximately 3,300 MHz.

This version supersedes the first edition published in 2018 and merges the scope of IEC 60728-13-1 (2017), providing an integrated technical revision that enhances bandwidth considerations and specifies digital signal levels at the system outlets.

Key Topics

• Optical Systems for Digital Broadcast Transmission
  Covers the deployment and operation of optical networks for distributing digitally modulated television and sound signals using FTTH architecture.

• FTTH Network Specifications
  Specifies the system requirements for FTTH networks, including physical reference models and the performance of optical components between headend and outlets.

• Performance Parameters and Measurement Methods
  Defines procedures for measuring key optical and electrical parameters such as optical power, optical wavelength, signal-to-intermodulation and noise ratio (SINR), relative intensity noise (RIN), signal-to-crosstalk ratio (SCR), modulation error ratio (MER), and bit error ratio (BER).

• Optical Wavelength and Source Signal Frequency
  Specifies the optical wavelength ranges suitable for FTTH systems and details on broadcast signal frequencies, supporting an upper limit of around 3,300 MHz.

• Interference and Noise Management
  Addresses potential interference between telecommunications and broadcast systems, providing guidelines to maintain signal integrity.

• System Outlet Signal Levels
  Introduces tables quantifying digital signal levels at system outlets, facilitating standardized performance assessment in subscriber premises.

• xPON System as Physical Layer Media
  Integrates the concept of passive optical networks (xPON) as the underlying physical medium for broadcast transmissions, focusing on downstream RF video signal delivery.

Applications

IEC 60728-113:2023 is vital for:

• Broadcasters and Network Operators
  Designing and implementing optical cable networks that efficiently and reliably deliver digital TV and radio signals to consumers’ homes via FTTH.

• Equipment Manufacturers
  Developing compliant optical transmission equipment, headend devices, optical transceivers, and system outlets optimized for digital broadcast distribution.

• Telecommunication Service Providers
  Ensuring compatibility and coexistence of telecommunication and broadcast services over shared optical infrastructure, particularly where telecommunication networks deliver video signals.

• Installation and Maintenance Professionals
  Performing accurate in-field measurement and verification of optical broadcast systems, ensuring system performance meets international standards.

• Regulatory Bodies and Standardization Entities
  Formulating policies and technical guidelines for digital broadcast signal transmission over optical cable networks adhering to international benchmarks.

Related Standards

• IEC 60728 Series
  A broader collection addressing cable networks for television and sound signals, interactive services, and related transmission technologies.

• IEC 60728-13-1 (Merged into 60728-113:2023)
  Previously focused on bandwidth expansion for broadcast signals over FTTH, now integrated into the current version.

• xPON Standards
  Technical standards governing passive optical network architectures that serve as the physical layer for FTTH systems.

• Telecommunication Network Standards
  Applicable where broadcast signals coexist or utilize telecom infrastructure, ensuring compliance with optical system performance requirements defined by IEC 60728-113.

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Keywords: IEC 60728-113, optical broadcast transmission, cable networks, digital channels, FTTH, fiber-to-the-home, digital television distribution, optical systems, signal-to-noise ratio, modulation error ratio, bit error ratio, broadcast signal measurement, xPON, optical wavelength, telecommunication coexistence, IEC standards, digital broadcast networks.

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
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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

– 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

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

– 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

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

– 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) . 71
Figure 34 – Level difference between signal and reflected (echo) signal
(ISDB‑C 256QAM) . 71
Figure A.1 – Example of a multi-channel service system of one million terminals . 73
Figure A.2 – Example of a multi-channel service system of 2 000 terminals . 74
Figure A.3 – Example of re-transmission service system of 72 terminals . 75
Figure A.4 – Example of re-transmission service system of 144 terminals . 75
Figure A.5 – Model 1 system performance calculation . 79
Figure A.6 – Model 4 system performance calculation . 80
Figure B.1 – Extrapolation method of BER measurement . 82
Figure B.2 – BER characteristics for 256-QAM, 1 024-QAM and 4 096-QAM
(extrapolation method) . 83
Figure C.1 – Reflection model . 84
Figure C.2 – Degradation factors of optical transmission system . 85
Figure C.3 – SBS generation image . 85
Figure C.4 – Interference between two wavelengths . 87
Figure C.5 – Simulation of SRS (OLT transmission power versus D/U) . 87
Figure C.6 – Simulation of SRS (D/U in arbitrary unit versus fibre length) . 88
Figure C.7 – Fibre length of the first peak of SRS D/U versus frequency . 88
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) . 89
Figure D.1 – Measurement of gain (G) . 91
Figure E.1 – Typical CCDF curves for OFDM and M-QAM signals . 93
Figure E.2 – CCDF measurement setup . 94
Figure E.3 – CCDF measurement example . 95
Figure E.4 – SER vs SINR performance in an AWGN channel . 96
Figure E.5 – Example of CCDF measurements . 96
Figure E.6 – Performance evaluation of digital optical signals in the FTTH system. 97
Figure E.7 – CCDF measurement bandwidth . 97
Figure F.1 – Clipping effects in laser diode static curve (IL curve) . 99
Figure F.2 – Clipping noise, zero span, sweep time 100 µs . 99

Table 1 – Level of RF signals . 16
Table 2 – Optical wavelength for FTTH system . 24
Table 3 – Frequency range . 24
Table 4 – Measuring equipment . 27
Table 5 – Measuring points and measured parameters . 29
Table 6 – Parameters used for the calculation of SINR . 39
Table 7 – RF signal noise bandwidth . 40
Table 8 – Digital signal levels at the system outlet . 53
Table 9 – Minimum SINR (SDU case) . 54
Table 10 – Minimum SINR (MDU case) . 55
Table 11 – Minimum RF SINR requirements in operation . 56
Table 12 – Types of broadcast services . 58
Table 13 – Types of broadcast services and relative signal level . 60
Table 14 – Minimum operational RIN values for digital broadcast services using the
frequency band below 1 000 MHz . 60
Table 15 – Type of service and minimum operational RIN values for satellite services . 61
Table 16 – Performance of optical wavelength and power . 62
a
Table 17 – Minimum MER Performance for FTTH systems . 66
Table 18– Section SINR for in-house/in-building wiring . 67
Table 19 – In-band frequency characteristics specification . 68
Table 20 – Limits for in-channel electrical signal interference . 69
Table 21 – Interference level due to fibre non-linearity . 72
Table 22 – Environmental conditions . 72
Table A.1 – Operating conditions of a multi-channel service system . 74
Table A.2 – Operating conditions of re-transmission service system . 76
Table A.3 – Basic system parameters for multi-channel and re-transmission service
systems . 78
Table C.1 – Disturbance parameter of Raman crosstalk . 86

– 8 – IEC 60728-113:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –

Part 113: Optical systems for broadcast signal
transmissions loaded with digital channels only

FOREWORD
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IEC 60728-113 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 systems and equipment. It is an International Standard.
This second edition 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 (Table 8) has been added.

The text of this International Standard is based on the following documents:
Draft Report on voting
100/3900/FDIS 100/3920/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
The list of all the parts of 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.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under 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.
IMPORTANT – The "colour inside" logo on the cover page of this document 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.

– 10 – IEC 60728-113:2023 © IEC 2023
INTRODUCTION
International Standards and other deliverables of the IEC 60728 series deal with cable networks,
including equipment and associated methods of measurement for headend reception,
processing and distribution of television and sound signals and for processing, interfacing and
transmitting all kinds of data signals for interactive services using all applicable transmission
media. These signals are typically transmitted in networks by frequency-multiplexing techniques.
This includes, for instance:
• regional and local broadband cable networks,
• extended satellite and terrestrial television distribution systems,
• individual satellite and terrestrial television receiving systems,
and all kinds of equipment, systems and installations used in such cable networks, distribution
and receiving systems.
The extent of this standardization work ranges from antennas and/or special interfaces to
headends, or other interface points on the network up to any terminal interface of the equipment
on the customer's premises.
The standardization work will consider coexistence with users of the RF spectrum in wired and
wireless transmission systems.
The standardization of any user terminals (i.e. tuners, receivers, decoders, multimedia terminals)
as well as of any coaxial, balanced and optical cables and accessories thereof is excluded.

CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –

Part 113: Optical systems for broadcast signal
transmissions loaded with digital channels only

1 Scope
This part of IEC 60728 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) netw
...