IEC 60728-101-2:2023

Cable networks for television signals, sound signals and interactive services - Part 101-2: Performance requirements for signals delivered at the system outlet in operation with all-digital channels load

IEC 60728-101-2:2023 provides the minimum performance requirements to be fulfilled in operation at the system outlet or terminal input and describes the summation criteria for the impairments present in the received signals and those produced by the CATV/MATV/SMATV cable network, including individual receiving systems.
In a building divided into apartment blocks, the signals received by the antennas are distributed by the MATV/SMATV cable network up to the home network interface (HNI); the television signals are then distributed (inside the home) by home networks (HN) of various types up to the system outlet or terminal input. The cable network can support two-way operation, from the system outlet (or terminal input) towards the headend.
The home network can use coaxial cables, balanced pair cables, fibre optic cables (glass or plastic) and also wireless links inside a room (or a small number of adjacent rooms) to replace wired cords.
This part of IEC 60728 is limited to downstream TV broadcast signals received from antennas and is applicable to cable networks intended for television signals, sound signals and interactive services operating between about 5 MHz and 3 300 MHz. The frequency range is extended to 6 000 MHz for home distribution techniques that replace wired cords with a wireless two-way communication inside a room (or a small number of adjacent rooms) that uses the 5 GHz to 6 GHz frequency band.
The main sections of a general CATV/MATV/SMATV system, indicating the parts of the IEC 60728-101 series documents where the relevant performance requirements are indicated.
- The requirements for the signals received at the headend are given in IEC 60728-101:2016, Clause 6.
- The requirements for the CATV/MATV/SMATV cable network, assuming an unimpaired input signal at the input of the headend, up to the system outlet are given in IEC 60728‑101:2016, Clause 5.
- The requirements for the CATV/MATV/SMATV cable network up to the home network interface (HNI) are given in IEC 60728-101:2016, Clause 7, assuming an unimpaired input signal at the input of the headend.
- The specific requirements from HNI to the system outlet or terminal input are given in IEC 60728-101-1:2023, Clause 5, assuming an unimpaired input signal at the HNI.
- The requirements at the system outlet in operation are given in Clause 6 of this document.
The expression "in operation" means that the received signals, with their impairments, are applied to the headend input of the CATV/MATV/SMATV cable network. The requirements at the system outlet "in operation" are derived, therefore, by summing the impairments of the various cascaded parts of the system and of the input signal.
When a change of signal format from digital to digital (e.g. from QPSK to QAM) (e.g. as in ETSI EN 300 473) or from digital to analogue (e.g. from DVB-S/S2 to AM-VSB or DVB-T/T2 to AM-VSB) is made at the headend, the summation of the impairments that produce a relaxation of requirements at system outlet does not apply. Such a case will be the equivalence of unimpaired signals applied at the headend input. Therefore, the requirements at system outlet given in IEC 60728‑1 apply.
This document also provides references for the basic methods of measurement of the operational characteristics of the downstream cable network in order to assess its performance.
All requirements refer to the performance limits to be achieved in operation at any system outlet when terminated in a resistance equal to the nominal load impedance of the system, unless otherwise specified. Where system outlets are not used, the above applies to the terminal input.
The present document also provides limits for the accumulation of degradations if the home network is subdivided into a number of parts, using different transmission media (e.g. coaxial cabling, balanced cabling, optical cabling, wireless links).
This International Standard is to be used in conjunction with IEC 60728-101:2016.

Réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonore et services interactifs - Partie 101-2: Exigences de performance relatives aux signaux délivrés à la prise d'abonné en fonctionnement sous une charge de porteuses exclusivement numériques

L'IEC 60728-101-2:2023 fournit les exigences de performances minimales qui doivent être respectées en fonctionnement au niveau de la prise d'abonné ou de l'entrée de terminal, et décrit les critères de sommation pour les dégradations présentes dans les signaux reçus et celles générées par le réseau de distribution par câble CATV/MATV/SMATV, y compris les systèmes de réception individuels.
Dans un bâtiment divisé en blocs d'appartements, les signaux reçus par les antennes sont distribués par le réseau de distribution par câble MATV/SMATV jusqu'à l'interface de réseau domestique (HNI). Les signaux de télévision sont ensuite distribués (à l'intérieur du domicile) par différents types de réseaux domestiques (HN) jusqu'à la prise d'abonné ou l'entrée de terminal. Le réseau de distribution par câble peut prendre en charge un fonctionnement bidirectionnel, de la prise d'abonné (ou l'entrée de terminal) vers la tête de réseau.
Le réseau domestique peut utiliser des câbles coaxiaux, des câbles à paires symétriques, des câbles à fibres optiques (verre ou plastique) ainsi que des liaisons sans fil à l'intérieur d'une pièce (ou d'un nombre restreint de pièces adjacentes) pour remplacer les cordons câblés.
La présente partie de l'IEC 60728 se limite aux signaux de diffusion TV en aval émis par des antennes et s'applique aux réseaux de distribution par câble destinés aux signaux de télévision, aux signaux de radiodiffusion sonore et aux services interactifs qui fonctionnent entre environ 5 MHz et 3 300 MHz. La plage de fréquences est étendue à 6 000 MHz pour les techniques de distribution domestique qui remplacent les cordons câblés par une communication bidirectionnelle sans fil à l'intérieur d'une pièce (ou d'un nombre restreint de pièces adjacentes) qui utilise la bande de fréquences comprise entre 5 GHz et 6 GHz.
Les principales sections d'un système CATV/MATV/SMATV général, en précisant les parties des documents de la série IEC 60728-101 dans lesquelles les exigences de performances pertinentes sont indiquées.
- Les exigences relatives aux signaux reçus au niveau de la tête de réseau sont données à l'Article 6 de l'IEC 60728-101:2016.
- Les exigences relatives au réseau de distribution par câble CATV/MATV/SMATV, en prenant pour hypothèse un signal d'entrée dégradé à l'entrée de la tête de réseau, jusqu'à la prise d'abonné, sont données à l'Article 5 de l'IEC 60728 101:2016.
- Les exigences relatives au réseau de distribution par câble CATV/MATV/SMATV jusqu'à l'interface de réseau domestique (HNI) sont données à l'Article 7 de l'IEC 60728-101:2016, en prenant pour hypothèse un signal d'entrée non dégradé à l'entrée de la tête de réseau.
- Les exigences spécifiques entre la HNI et la prise d'abonné ou l'entrée de terminal sont données à l'Article 5 de l'IEC 60728-101-1:2023, en prenant pour hypothèse un signal d'entrée non dégradé à la HNI.
- Les exigences au niveau de la prise d'abonné en fonctionnement sont données à l'Article 6 du présent document.
L'expression "en fonctionnement" signifie que les signaux reçus, avec leurs dégradations, sont appliqués à l'entrée de tête du réseau de distribution par câble CATV/MATV/SMATV. Les exigences au niveau de la prise d'abonné "en fonctionnement" sont donc déduites par sommation des dégradations des différentes parties en cascade du système et du signal d'entrée.
En cas de changement de format de signal numérique/numérique (de QPSK à MAQ, par exemple) (comme dans l'ETSI EN 300 473) ou numérique/analogique (de DVB-S/S2 à AM-VSB ou de DVB-T/T2 à AM-VSB, par exemple) au niveau de la tête de réseau, la sommation des dégradations qui produisent un assouplissement des exigences au niveau de la prise d'abonné ne s'applique pas. Ce type de cas équivaut aux signaux non dégradés appliqués à l'entrée de tête de réseau. Par conséquent, les exigences au niveau de la prise d'abonné données dans l'IEC 60728 1 s'appliquent.
Le présent document fait également référence aux méthodes de mesure de base

General Information

• Status: Published
• Publication Date: 06-Jun-2023
• ICS: 33.040.20 - Transmission systems
• ICS: 33.160.01 - Audio, video and audiovisual systems in general
• Technical Committee: TA 5 - Cable networks for television signals, sound signals and interactive services
• Drafting Committee: WG 7 - TC 100/TA 5/WG 7
• Current Stage: PPUB - Publication issued
• Start Date: 07-Jul-2023
• Completion Date: 07-Jun-2023

Standards Content (Sample)

IEC 60728-101-2
®

Edition 1.0 2023-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Cable networks for television signals, sound signals and interactive services –
Part 101-2: Performance requirements for signals delivered at the system outlet
in operation with all-digital channels load

Réseaux de distribution par câbles pour signaux de télévision, signaux de
radiodiffusion sonore et services interactifs –
Partie 101-2: Exigences de performance relatives aux signaux délivrés à la prise
d'abonné en fonctionnement sous une charge de porteuses exclusivement
numériques
IEC 60728-101-2:2023-06(en-fr)

---------------------- Page: 1 ----------------------
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IEC 60728-101-2

®


Edition 1.0 2023-06




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE











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

Part 101-2: Performance requirements for signals delivered at the system outlet

in operation with all-digital channels load



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

radiodiffusion sonore et services interactifs –


Partie 101-2: Exigences de performance relatives aux signaux délivrés à la prise

d'abonné en fonctionnement sous une charge de porteuses exclusivement

numériques










INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE





ICS 33.040.20, 33.160.01 ISBN 978-2-8322-7111-7




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 60728-101-2:2023 © IEC 2023
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms, definitions, symbols and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 17
4 Methods of measurement . 18
5 Summation of the impairments . 18
5.1 Impairments to be summed . 18
5.2 Summation laws . 18
5.2.1 General . 18
5.2.2 Voltage addition . 18
5.2.3 Power addition . 19
5.3 Examples . 19
6 Performance requirements in operation . 20
6.1 General . 20
6.2 Impedance . 20
6.3 Performance requirements at the terminal input . 20
6.3.1 Definition . 20
6.3.2 Signal level . 20
6.3.3 Other parameters . 21
6.4 Performance requirements at system outlets . 21
6.4.1 Minimum and maximum signal levels . 21
6.4.2 Mutual isolation between system outlets . 21
6.4.3 Isolation between individual outlets in one household . 21
6.4.4 Isolation between forward and return path . 21
6.4.5 Long-term frequency stability of distributed signals at any system outlet . 21
6.4.6 RF signal level differences at system outlet . 21
6.4.7 Frequency response within a television channel . 21
6.4.8 Random noise at system outlet . 21
6.4.9 Interference to television channels. 24
6.5 Additional performance requirements . 25
6.5.1 DVB (PSK, QAM, OFDM) performance . 25
6.5.2 DAB performance . 25
Annex A (informative) Examples of summation of impairments . 26
A.1 Voltage addition . 26
A.2 Power addition . 26
Bibliography . 28

Figure 1 – CATV/MATV/SMATV cable network – Performance requirements . 8
Figure 2 – Examples of location of HNI for various home network types . 13

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IEC 60728-101-2:2023 © IEC 2023 – 3 –
Table 1 – RF signal-to-intermodulation and noise ratios at system outlet in operation . 22
Table 2 – Signal-to-intermodulation and noise ratios at system outlet (sound radio) in
operation . 24
Table 3 – Modulation error ratio (MER) of DVB signals in operation . 25
Table A.1 – Examples of voltage addition . 26
Table A.2 – Examples of power addition . 27

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– 4 – IEC 60728-101-2:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

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

Part 101-2: Performance requirements for signals delivered at
the system outlet in operation with all-digital channels load

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
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rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 60728-101-2 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 International Standard is to be used in conjunction with IEC 60728-101:2016.
The text of this International Standard is based on the following documents:
Draft Report on voting
100/3903/FDIS 100/3944/RVD

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.

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IEC 60728-101-2:2023 © IEC 2023 – 5 –
The language used for the development of this International Standard is English.
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 of the IEC 60728 series, 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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– 6 – IEC 60728-101-2:2023 © IEC 2023
INTRODUCTION
Standards and 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 is from the antennas and/or special signal source inputs
to the headend or other interface points to the network up to the terminal input of the customer
premises equipment.
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,
etc.) as well as of any coaxial, balanced and optical cables and accessories thereof is excluded.
The reception of television signals inside a building requires an outdoor antenna and a
distribution network to convey the signal to the TV receivers.
This part of IEC 60728 deals with the requirements that are to be fulfilled at the system outlet
or terminal input, when the CATV/MATV/SMATV system is in operation.
These performance requirements for signals at the system outlet or terminal input in operation
are derived from considerations of the characteristics of the received signals at the input of the
headend (see IEC 60728-101:2016, Clause 6) and the summation of the impairments produced
by the headend, the CATV/MATV/SMATV network and the home network, when the
requirements given in IEC 60728-101 and IEC 60728-101-1 are fulfilled.
This document gives the guidelines for calculation of the operational characteristics at system
outlet, taking into account the performance requirements of the CATV/MATV/SMATV network,
of the home networks and of the received signals, given in IEC 60728-101 and IEC 60728-101-1.
This document considers digital signals only and is based on IEC 60728-101 dealing with
system performance of forward paths loaded with digital channels only. For performance
requirements for analogue signals delivered at the system outlet in operation, refer to
IEC 60728-1-2.
Although the upper frequency range of terrestrial broadcast signals depends on the allocation
frequency plan of each region (e.g. in Europe it is 694 MHz, the 700 MHz and 800 MHz bands
being assigned to telecommunication services), the upper frequency range into the cable
networks can be maintained at 862 MHz in order to maximise the number of channels distributed
in the cable networks, assuming that sufficient immunity (screening efficiency) to signals
radiated in the 700 MHz and 800 MHz bands is provided.

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IEC 60728-101-2:2023 © IEC 2023 – 7 –
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –

Part 101-2: Performance requirements for signals delivered at
the system outlet in operation with all-digital channels load



1 Scope
This part of IEC 60728-101 provides the minimum performance requirements to be fulfilled in
operation at the system outlet or terminal input and describes the summation criteria for the
impairments present in the received signals and those produced by the CATV/MATV/SMATV
cable network, including individual receiving systems.
NOTE 1 When a change of signal format is made at the headend, the summation of the impairments does not apply
(see also Clause 6).
In a building divided into apartment blocks, the signals received by the antennas are distributed
by the MATV/SMATV cable network up to the home network interface (HNI); the television
signals are then distributed (inside the home) by home networks (HN) of various types up to the
system outlet or terminal input. The cable network can support two-way operation, from the
system outlet (or terminal input) towards the headend.
The home network can use coaxial cables, balanced pair cables, fibre optic cables (glass or
plastic) and also wireless links inside a room (or a small number of adjacent rooms) to replace
wired cords.
This part of IEC 60728 is limited to downstream TV broadcast signals received from antennas
and is applicable to cable networks intended for television signals, sound signals and interactive
services operating between about 5 MHz and 3 300 MHz. The frequency range is extended to
6 000 MHz for home distribution techniques that replace wired cords with a wireless two-way
communication inside a room (or a small number of adjacent rooms) that uses the 5 GHz to
6 GHz frequency band.
Figure 1 shows the main sections of a general CATV/MATV/SMATV system, indicating the parts
of the IEC 60728-101 series documents where the relevant performance requirements are
indicated.
• The requirements for the signals received at the headend are given in IEC 60728-101:2016,
Clause 6.
• The requirements for the CATV/MATV/SMATV cable network, assuming an unimpaired input
signal at the input of the headend, up to the system outlet are given in IEC 60728-101:2016,
Clause 5.
• The requirements for the CATV/MATV/SMATV cable network up to the home network
interface (HNI) are given in IEC 60728-101:2016, Clause 7, assuming an unimpaired input
signal at the input of the headend.
• The specific requirements from HNI to the system outlet or terminal input are given in
IEC 60728-101-1:2023, Clause 5, assuming an unimpaired input signal at the HNI.
• The requirements at the system outlet in operation are given in Clause 6 of this document.
The expression "in operation" means that the received signals, with their impairments, are
applied to the headend input of the CATV/MATV/SMATV cable network. The requirements at
the system outlet "in operation" are derived, therefore, by summing the impairments of the
various cascaded parts of the system and of the input signal.

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– 8 – IEC 60728-101-2:2023 © IEC 2023
When a change of signal format from digital to digital (e.g. from QPSK to QAM) (e.g. as in
ETSI EN 300 473) or from digital to analogue (e.g. from DVB-S/S2 to AM-VSB or DVB-T/T2 to
AM-VSB) is made at the headend, the summation of the impairments that produce a relaxation
of requirements at system outlet does not apply. Such a case will be the equivalence of
unimpaired signals applied at the headend input. Therefore, the requirements at system outlet
given in IEC 60728-1 apply.

Diagram of the main sections of a CATV/MATV/SMATV cable network and the relevant parts of the IEC 60728-101
series where the requirements are indicated.
Figure 1 – CATV/MATV/SMATV cable network – Performance requirements
This document also provides references for the basic methods of measurement of the
operational characteristics of the downstream cable network in order to assess its performance.
All requirements refer to the performance limits to be achieved in operation at any system outlet
when terminated in a resistance equal to the nominal load impedance of the system, unless
otherwise specified. Where system outlets are not used, the above applies to the terminal input.
The present document also provides limits for the accumulation of degradations if the home
network is subdivided into a number of parts, using different transmission media (e.g. coaxial
cabling, balanced cabling, optical cabling, wireless links).
NOTE 2 Performance requirements of return paths as well as special methods of measurement for the use of the
return paths in cable networks are described in IEC 60728-10.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60728-101:2016, Cable networks for television signals, sound signals and interactive
services – Part 101: System performance of forward paths loaded with digital channels only
IEC 60728-101-1:2023, Cable networks for television signals, sound signals and interactive
services – Part 101-1: RF cabling for two-way home networks with all-digital channels load

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IEC 60728-101-2:2023 © IEC 2023 – 9 –
IEC 60728-3:2017, Cable networks for television signals sound signals and interactive services
– Part 3: Active wideband equipment for coaxial cable networks
IEC 60966-2-4, Radio frequency and coaxial cable assemblies – Part 2-4: Detail specification
for cable assemblies for radio and TV receivers – Frequency range 0 MHz to 3 000 MHz,
IEC 61169-2 connectors
IEC 60966-2-5, Radio frequency and coaxial cable assemblies – Part 2-5: Detail specification
for cable assemblies for radio and TV receivers – Frequency range 0 MHz to 1 000 MHz,
IEC 61169-2 connectors
IEC 60966-2-6, Radio frequency and coaxial cable assemblies – Part 2-6: Detail specification
for cable assemblies for radio and TV receivers – Frequency range 0 MHz to 3 000 MHz,
IEC 61169-24 connectors
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
active home network
home network that uses active equipment (for example, amplifiers) in addition to passive
equipment such as splitters, taps, system outlets, cables and connectors up to the coaxial RF
interface (input and/or output) of the terminal equipment for distributing and combining RF
signals
[SOURCE: IEC 60728-1:2014, 3.1.2]
3.1.2
antenna
part of a radio transmitting or receiving system which is designed to provide the required
coupling between a transmitter or a receiver and the medium in which the radio wave
propagates
Note 1 to entry: In practice, the terminals of the antenna or the points to be considered as the interface between
the antenna and the transmitter or receiver are specified.
Note 2 to entry: If the transmitter or receiver is connected to its antenna by a feeder line, the antenna is considered
to be a transducer between the guided radio waves of the feeder line and the radiated waves in space.
Note 3 to entry: See also IEC 60728-1:2014, 3.1.3, IEC 60728-1-1:2014, 3.1.2 and IEC 60728-1-2:2014, 3.1.2.
[SOURCE: IEC 60050-712:1992, 712-01-01, modified – The deprecated term "aerial" has been
deleted, in Note 1 to entry "should be specified" has been replaced by "are specified", Note 2
to entry has been clarified and a Note 3 to entry giving additional references has been added.]

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– 10 – IEC 60728-101-2:2023 © IEC 2023
3.1.3
attenuation
ratio of the input power to the output power of equipment or a system
Note 1 to entry: The ratio is expressed in decibels.
[SOURCE: IEC 60728-1:2014, 3.1.5]
3.1.4
balun
device for transforming an unbalanced voltage to a balanced voltage or vice-versa
Note 1 to entry: The term is derived from "balanced to unbalanced transformer".
[SOURCE: IEC 60728-101-1:2023, 3.1.4]
3.1.5
bit error ratio
BER
ratio between erroneous bits and the total number of transmitted bits
[SOURCE: IEC 60728-1:2014, 3.1.9]
3.1.6
CATV network
regional and local broadband cable networks designed to provide sound and television signals
as well as signals for interactive services to a regional or local area
Note 1 to entry: Originally defined as Community Antenna Television network.
[SOURCE: IEC 60728-1-1:2014, 3.1.9]
3.1.7
decibel ratio
ten times
...