IEC 60728-106:2023

Cable networks for television signals, sound signals and interactive services - Part 106: Optical equipment for systems loaded with digital channels only

IEC 60728-106:2023 lays down the measuring methods, performance requirements and data publication requirements of optical equipment of cable networks for television signals, sound signals and interactive services loaded with digital channels only.
This document
• applies to all optical transmitters, receivers, amplifiers, directional couplers, isolators, multiplexing devices, connectors and splices used in cable networks;
• covers the frequency range 5 MHz to 3 300 MHz;
• identifies guaranteed performance requirements for certain parameters;
• lays down data publication requirements with guaranteed performance;
• describes methods of measurement for compliance testing.
All requirements and published data relate to minimum performance levels within the specified frequency range and in well-matched conditions as might be applicable to cable networks for television signals, sound signals and interactive services.

Réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonores et services interactifs – Partie 106: Matériel optique pour systèmes soumis à une charge de porteuses exclusivement numériques

L'IEC 60728-106:2023 définit les méthodes de mesurage, les exigences de performance et les exigences de publication des données des matériels optiques des réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonore et services interactifs soumis à une charge de porteuses exclusivement numériques.
Le présent document:
- s'applique à l'ensemble des émetteurs, récepteurs, amplificateurs, coupleurs directifs, isolateurs, multiplexeurs, connecteurs et épissures optiques, utilisés dans les réseaux de distribution par câbles;
- couvre la plage de fréquences de 5 MHz à 3 300 MHz;
- identifie les exigences de performances assurées pour certains paramètres;
- établit les exigences de publication des données avec les performances assurées;
- décrit les méthodes de mesurage pour les essais de conformité.
Toutes les exigences et données publiées se rapportent aux niveaux de performance minimale dans la plage de fréquences spécifiée et dans des conditions bien adaptées qui peuvent s'appliquer aux réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonore et services interactifs.

General Information

• Status: Published
• Publication Date: 29-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: 30-May-2023

Standards Content (Sample)

IEC 60728-106
®

Edition 1.0 2023-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Cable networks for television signals, sound signals and interactive services –
Part 106: Optical equipment for systems loaded with digital channels only

Réseaux de distribution par câbles pour signaux de télévision, signaux de
radiodiffusion sonore et services interactifs –
Partie 106: Matériel optique pour systèmes soumis à une charge de porteuses
exclusivement numériques
IEC 60728-106:2023-05(en-fr)

---------------------- Page: 1 ----------------------
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IEC 60728-106

®


Edition 1.0 2023-05




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE











Cable networks for television signals, sound signals and interactive services –

Part 106: Optical equipment for systems loaded with digital channels only



Réseaux de distribution par câbles pour signaux de télévision, signaux de

radiodiffusion sonore et services interactifs –

Partie 106: Matériel optique pour systèmes soumis à une charge de porteuses


exclusivement numériques












INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE





ICS 33.060.40  ISBN 978-2-8322-7053-0




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 60728-106:2023 © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions, graphical symbols and abbreviated terms. 9
3.1 Terms and definitions . 9
3.2 Graphical symbols . 16
3.3 Abbreviated terms . 18
4 Methods of measurement . 19
4.1 Measurement requirements . 19
4.1.1 General . 19
4.1.2 Input specification . 19
4.1.3 Measurement conditions . 19
4.2 Optical power . 19
4.3 Loss, isolation, directivity and coupling ratio . 19
4.3.1 General . 19
4.3.2 Measurement requirements . 19
4.3.3 Measurement procedure . 20
4.4 Return loss . 20
4.5 Saturation output power of an optical amplifier . 20
4.5.1 Purpose . 20
4.5.2 Measurement procedure . 21
4.6 Centroidal wavelength and spectral width under modulation. 21
4.7 Linewidth and chirping of transmitters with single mode lasers . 21
4.7.1 Purpose . 21
4.7.2 Equipment required . 21
4.7.3 General measurement requirements . 22
4.7.4 Measurement procedure . 22
4.7.5 Potential sources of error . 23
4.8 Optical modulation index . 23
4.8.1 Purpose . 23
4.8.2 Equipment required . 23
4.8.3 Measurement procedure . 23
4.8.4 Potential sources of error . 24
4.9 Reference output level of an optical receiver . 24
4.9.1 Purpose . 24
4.9.2 Equipment required . 25
4.9.3 General measurement requirements . 25
4.9.4 Measurement procedure . 25
4.9.5 Potential sources of error . 25
4.10 Slope and flatness . 26
4.10.1 Purpose . 26
4.10.2 Equipment required . 26
4.10.3 Measurement procedure . 26
4.10.4 Potential sources of error . 27
4.11 Transmitter non-linearity . 27
4.11.1 Purpose . 27

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IEC 60728-106:2023 © IEC 2023 – 3 –
4.11.2 Equipment required . 28
4.11.3 Measurement procedure . 28
4.11.4 Potential sources of error . 28
4.12 Receiver intermodulation . 29
4.12.1 Purpose . 29
4.12.2 Equipment required . 29
4.12.3 General measurement requirements . 29
4.12.4 Measurement procedure . 29
4.12.5 Potential sources of error . 31
4.13 Microscopic gain tilt of optical amplifiers . 31
4.13.1 Purpose . 31
4.13.2 Equipment required . 31
4.13.3 Measurement procedure . 31
4.13.4 Potential sources of error . 32
4.14 Noise parameters of optical transmitters and optical receivers . 32
4.14.1 Purpose . 32
4.14.2 Equipment required . 33
4.14.3 General measurement requirements . 34
4.14.4 Measurement procedure . 34
4.14.5 Relative intensity noise . 37
4.14.6 Equivalent input noise current density . 37
4.14.7 Potential sources of error . 38
4.15 Method for combined measurement of relative intensity noise (RIN), optical

modulation index and equivalent input noise current . 38
4.15.1 Purpose . 38
4.15.2 Equipment required . 38
4.15.3 General measurement conditions . 39
4.15.4 Measurement procedure . 39
4.15.5 Potential sources of error . 40
4.16 Noise figure of optical amplifiers . 40
4.17 Influence of fibre . 40
4.17.1 Purpose . 40
4.17.2 Equipment required . 40
4.17.3 Measurement procedure . 40
4.17.4 Potential sources of error . 40
4.18 SBS threshold . 40
4.18.1 Purpose . 40
4.18.2 Equipment required . 41
4.18.3 Measurement procedure . 41
4.18.4 Potential sources of error . 41
4.19 Signal-to-crosstalk ratio (SCR) . 41
4.19.1 Purpose . 41
4.19.2 Equipment required . 42
4.19.3 Measurement procedure . 42
4.19.4 Potential sources of error . 43
5 Universal performance requirements and recommendations . 43
5.1 Safety . 43
5.2 Electromagnetic compatibility (EMC) . 43
5.3 Environmental . 43

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– 4 – IEC 60728-106:2023 © IEC 2023
5.4 Marking . 43
6 Active equipment . 43
6.1 Optical transmitters . 43
6.1.1 Data publication requirement . 43
6.1.2 Recommendations . 44
6.2 Optical receivers . 44
6.2.1 Data publication requirements . 44
6.2.2 Recommendations . 44
6.3 Optical amplifiers . 45
6.3.1 Data publication requirements . 45
6.3.2 Recommendations for optical amplifiers . 45
7 Passive equipment . 46
Bibliography . 47

Figure 1 – Tilt and microscopic gain tilt of optical amplifiers . 12
Figure 2 – Measurement of optical loss, directivity, isolation and coupling ratio . 20
Figure 3 – Saturation output power of an optical amplifier . 21
Figure 4 – Measurement of the chirping and the linewidth of transmitters. 22
Figure 5 – Measurement of the optical modulation index . 24
Figure 6 – Measurement of the reference output level of an optical receiver . 25
Figure 7 – Measurement of the slope and flatness . 26
Figure 8 – Evaluation of the slope . 27
Figure 9 – Evaluating the flatness . 27
Figure 10 – Equipment under test (EUT) for measuring non-linearity of optical
transmitters . 28
Figure 11 – Arrangement of test equipment for measuring receiver intermodulation . 30
Figure 12 – Arrangement of test equipment for measuring microscopic gain tilt. 31
Figure 13 – System with internal noise sources . 32
Figure 14 – PIN diode receiver. 33
Figure 15 – Optical transmission system under test . 34
Figure 16 – Arrangement of test equipment for RF signal-to-noise ratio measurement . 35
Figure 17 – Measurement set-up for determination of the noise parameters and the
optical modulation index . 39
Figure 18 – Arrangement for measuring the SBS threshold . 41
Figure 19 – Arrangement for measuring the SCR . 42

Table 1 – Noise correction factors C for different noise level differences D . 36
n
Table 2 – Recommendations for optical forward path transmitters . 44
Table 3 – Recommendations for optical return path transmitters . 44
Table 4 – Recommendations for optical receivers . 45
Table 5 – Parameters of optical amplifiers . 45
Table 6 – Recommendations for optical amplifiers . 46

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IEC 60728-106:2023 © IEC 2023 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

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

Part 106: Optical equipment for systems loaded with digital channels only

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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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 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.
IEC 60728-106 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.
The text of this International Standard is based on the following documents:
Draft Report on voting
100/3899/FDIS 100/3923/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.

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– 6 – IEC 60728-106:2023 © IEC 2023
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.
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
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.

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IEC 60728-106:2023 © IEC 2023 – 7 –
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.

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– 8 – IEC 60728-106:2023 © IEC 2023
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –

Part 106: Optical equipment for systems loaded with digital channels only



1 Scope
This part of IEC 60728 lays down the measuring methods, performance requirements and data
publication requirements of optical equipment of cable networks for television signals, sound
signals and interactive services loaded with digital channels only.
This document
• applies to all optical transmitters, receivers, amplifiers, directional couplers, isolators,
multiplexing devices, connectors and splices used in cable networks;
• covers the frequency range 5 MHz to 3 300 MHz;
NOTE The upper limit of 3 300 MHz is an example, but not a strict value.
• identifies guaranteed performan
...