Cable networks for television signals, sound signals and interactive services - Part 3: Active wideband equipment for cable networks

IEC 60728-3:2017 is also available as IEC 60728-3:2017 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60728-3:2017 specifies the measuring methods, performance requirements and data publication requirements for active wideband equipment of cable networks for television signals, sound signals and interactive services. This fifth edition cancels and replaces the fourth edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) extension of upper frequency range limit for cable network equipment in the forward path from 1000 MHz to 1218 MHz (optional up to 1794 MHz);
b) extension of upper frequency range limit for cable network equipment in the return path from 85 MHz to 204 MHz;
c) integration and update of IEC 60728-3-1 content;
d) integration and update of the Technical Specification CLC/TS 50083-3-3 content;
e) deletion of specifications and test methods for obsolete analogue parameters;
f) additional normative references;
g) additional terms and definitions and abbreviations.

Réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonore et services interactifs - Partie 3: Matériel actif à large bande pour réseaux de distribution par câbles

L'IEC 60728-3:2017 spécifie les méthodes de mesurage, les exigences de performance et les exigences de publication des données caractéristiques des matériels actifs à large bande des réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonore et services interactifs.
Le présent document
• s'applique à tous les amplificateurs utilisés dans les réseaux de distribution par câbles;
• couvre la plage de fréquences de 5 MHz à 3 000 MHz;
• s'applique aux matériels unidirectionnels et bidirectionnels;
• spécifie les méthodes de mesurage de base des caractéristiques fonctionnelles du matériel actif qui permettent d'évaluer la performance de ces matériels;
• identifie les spécifications de performance qui doivent être publiées par les fabricants;
• définit les exigences de performance minimales pour certains paramètres.
L'IEC 60728-3:2017 annule et remplace la quatrième édition parue en 2010. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) extension de la limite supérieure de la plage de fréquences pour les matériels de réseaux de distribution par câbles dans la voie descendante de 1 000 MHz à 1 218 MHz (en option jusqu'à 1 794 MHz);
b) extension de la limite supérieure de la plage de fréquences pour les matériels de réseaux de distribution par câbles dans la voie de retour de 85 MHz à 204 MHz;
c) intégration et mise à jour du contenu de l'IEC 60728-3-1;
d) intégration et mise à jour du contenu de la spécification technique CLC/TS 50083-3-3;
e) suppression des spécifications et des méthodes d'essai pour les paramètres analogiques obsolètes;
f) références normatives supplémentaires;
g) termes, définitions et abréviations supplémentaires.

General Information

Status
Published
Publication Date
26-Nov-2017
Current Stage
PPUB - Publication issued
Completion Date
27-Nov-2017
Ref Project

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IEC 60728-3
Edition 5.0 2017-11
INTERNATIONAL
STANDARD
colour
inside
Cable networks for television signals, sound signals and interactive services
Part 3: Active wideband equipment for cable networks
IEC 60728-3:2017-11(en)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2017 IEC, Geneva, Switzerland

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

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Switzerland www.iec.ch
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---------------------- Page: 2 ----------------------
IEC 60728-3
Edition 5.0 2017-11
INTERNATIONAL
STANDARD
colour
inside
Cable networks for television signals, sound signals and interactive services
Part 3: Active wideband equipment for cable networks
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.060.40; 33.170 ISBN 978-2-8322-4934-5

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – IEC 60728-3:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 5

INTRODUCTION ..................................................................................................................... 7

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 8

3 Terms, definitions, symbols and abbreviated terms .......................................................... 9

3.1 Terms and definitions .............................................................................................. 9

3.2 Symbols ................................................................................................................ 12

3.3 Abbreviated terms ................................................................................................. 14

4 Methods of measurement .............................................................................................. 14

4.1 General ................................................................................................................. 14

4.2 Linear distortion .................................................................................................... 15

4.2.1 Return loss .................................................................................................... 15

4.2.2 Group delay variation .................................................................................... 15

4.3 Non-linear distortion.............................................................................................. 16

4.3.1 General ......................................................................................................... 16

4.3.2 Types of measurements ................................................................................. 16

4.3.3 Intermodulation .............................................................................................. 17

4.3.4 Composite triple beat ..................................................................................... 19

4.3.5 Composite second order beat ........................................................................ 22

4.3.6 Method of measurement of non-linearity for pure digital channel load ............ 22

4.3.7 Hum modulation of carrier .............................................................................. 30

4.4 Noise figure .......................................................................................................... 33

4.4.1 General ......................................................................................................... 33

4.4.2 Equipment required ....................................................................................... 33

4.4.3 Connection of equipment ............................................................................... 33

4.4.4 Measurement procedure ................................................................................ 34

4.5 Crosstalk attenuation ............................................................................................ 34

4.5.1 Crosstalk attenuation for loop-through ports .................................................. 34

4.5.2 Crosstalk attenuation for output ports ............................................................ 34

4.6 Measurement of noise power ratio (NPR) .............................................................. 36

4.6.1 General ......................................................................................................... 36

4.6.2 Equipment required ....................................................................................... 37

4.6.3 Connection of equipment ............................................................................... 37

4.6.4 Measurement procedure ................................................................................ 38

4.6.5 Presentation of the results ............................................................................. 38

4.7 Immunity to surge voltages ................................................................................... 39

4.7.1 General ......................................................................................................... 39

4.7.2 Equipment required ....................................................................................... 39

4.7.3 Connection of equipment ............................................................................... 39

4.7.4 Measurement procedure ................................................................................ 40

5 Equipment requirements ................................................................................................ 40

5.1 General requirements ........................................................................................... 40

5.2 Safety ................................................................................................................... 40

5.3 Electromagnetic compatibility (EMC) ..................................................................... 40

5.4 Frequency range ................................................................................................... 40

5.5 Impedance and return loss .................................................................................... 40

---------------------- Page: 4 ----------------------
– 3 – IEC 60728-3:2017 © IEC 2017

5.6 Gain ...................................................................................................................... 41

5.6.1 Minimum and maximum gain .......................................................................... 41

5.6.2 Gain control ................................................................................................... 41

5.6.3 Slope and slope control ................................................................................. 41

5.7 Flatness ................................................................................................................ 41

5.8 Test points ............................................................................................................ 41

5.9 Noise figure .......................................................................................................... 41

5.10 Non-linear distortion.............................................................................................. 42

5.10.1 General ......................................................................................................... 42

5.10.2 Second-order distortion ................................................................................. 42

5.10.3 Third order distortion ..................................................................................... 42

5.10.4 Composite triple beat ..................................................................................... 42

5.10.5 Composite second order ................................................................................ 42

5.10.6 Maximum operating level for pure digital channel load ................................... 42

5.11 Hum modulation .................................................................................................... 43

5.12 Power supply ........................................................................................................ 43

5.13 Environmental ....................................................................................................... 43

5.13.1 General ......................................................................................................... 43

5.13.2 Transportation ............................................................................................... 43

5.13.3 Installation or maintenance ............................................................................ 43

5.13.4 Operation ...................................................................................................... 43

5.13.5 Energy efficiency of equipment ...................................................................... 44

5.14 Marking ................................................................................................................. 44

5.14.1 Marking of equipment .................................................................................... 44

5.14.2 Marking of ports ............................................................................................. 44

5.15 Requirements for multi-switches ........................................................................... 44

5.15.1 Control signals for multi-switches .................................................................. 44

5.15.2 Amplitude frequency response flatness .......................................................... 44

5.15.3 Return loss .................................................................................................... 44

5.15.4 Through loss .................................................................................................. 44

5.15.5 Isolation ......................................................................................................... 44

5.15.6 Crosstalk attenuation ..................................................................................... 44

5.15.7 Satellite IF to terrestrial signal isolation ......................................................... 45

5.16 Immunity to surge voltages ................................................................................... 45

5.16.1 Degrees of testing levels ............................................................................... 45

5.16.2 Recommendation of testing level degree ....................................................... 45

Annex A (normative) Test carriers, levels and intermodulation products ............................... 46

A.1 Two signal tests for second- and third-order products ........................................... 46

A.1.1 Intermodulation products with test signals at frequencies ƒ and ƒ ,
a b

see Table A.1 ................................................................................................ 46

A.1.2 Signal levels .................................................................................................. 46

A.2 Three signal tests for third order products – Intermodulation products with

test signals at frequencies ƒ , ƒ and ƒ , see Table A.2 and Figure A.3 .............. 47

a b c

Annex B (informative) Test frequency plan for composite triple beat (CTB), composite

second order (CSO) .............................................................................................................. 48

Annex C (informative) Measurement errors that occur due to mismatched equipment .......... 50

Annex D (informative) Examples of measurement channels ................................................. 51

D.1 Operating frequency range 110 MHz to 1 006 MHz ............................................... 51

D.2 Operating frequency range 110 MHz to 862 MHz .................................................. 51

---------------------- Page: 5 ----------------------
– 4 – IEC 60728-3:2017 © IEC 2017

D.3 Operating frequency range 258 MHz to 1 218 MHz ............................................... 51

Bibliography .......................................................................................................................... 52

Figure 1 – Basic arrangement of test equipment for evaluation of the ratio of signal to

intermodulation product ........................................................................................................ 18

Figure 2 – Connection of test equipment for the measurement of non-linear distortion

by composite beat ................................................................................................................. 21

Figure 3 – BER measurement test configuration ................................................................... 24

Figure 4 – CINR measurement test setup .............................................................................. 28

Figure 5 – Plot of CINR in dB curve (forward path) versus EUT channel output signal

level in dBµV ........................................................................................................................ 29

Figure 6 – Carrier/hum ratio .................................................................................................. 30

Figure 7 – Test set-up for local-powered objects ................................................................... 31

Figure 8 – Test set-up for remote-powered objects ............................................................... 31

Figure 9 – Oscilloscope display ............................................................................................ 32

Figure 10 – Measurement of noise figure .............................................................................. 33

Figure 11 – Measurement of crosstalk attenuation for loop through ports of multi-

switches................................................................................................................................ 36

Figure 12 – Characteristic of the noise filter .......................................................................... 37

Figure 13 – Test setup for the non-linearity measurement ..................................................... 37

Figure 14 – Presentation of the result of NPR ........................................................................ 39

Figure 15 – Measurement set-up for surge immunity test ...................................................... 40

Figure A.1 – An example showing products formed when 2ƒ >ƒ ....................................... 46

a b

Figure A.2 – An example showing products formed when 2ƒ < ƒ ....................................... 47

a b

Figure A.3 – Products of the form ƒ ± ƒ ± ƒ ...................................................................... 47

a b c

Figure C.1 – Error concerning return loss measurement ....................................................... 50

Figure C.2 – Maximum ripple ................................................................................................ 50

Table 1 – Measurement parameters for full channel load ...................................................... 26

Table 2 – Notch filter frequencies ......................................................................................... 37

Table 3 – Example of return loss requirements ..................................................................... 41

Table 4 – Parameters of surge voltages for different degrees of testing levels ...................... 45

Table 5 – Recommendations for degree of testing levels ...................................................... 45

Table A.1 – Intermodulation products with two signals .......................................................... 46

Table A.2 – Intermodulation products with three signals ........................................................ 47

Table B.1 – Frequency allocation plan .................................................................................. 48

---------------------- Page: 6 ----------------------
– 5 – IEC 60728-3:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –
Part 3: Active wideband equipment for cable networks
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 co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

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with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

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other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

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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.

International Standard IEC 60728-3 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.

This fifth edition cancels and replaces the fourth edition published in 2010. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:

a) extension of upper frequency range limit for cable network equipment in the forward path

from 1 000 MHz to 1 218 MHz (optional up to 1 794 MHz);

b) extension of upper frequency range limit for cable network equipment in the return path

from 85 MHz to 204 MHz;
c) integration and update of IEC 60728-3-1 content;
---------------------- Page: 7 ----------------------
– 6 – IEC 60728-3:2017 © IEC 2017

d) integration and update of the Technical Specification CLC/TS 50083-3-3 content;

e) deletion of specifications and test methods for obsolete analogue parameters;
f) additional normative references;
g) additional terms and definitions and abbreviations.
The text of this International Standard is based on the following documents:
FDIS Report on voting
100/2975/FDIS 100/2990/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

The list of all the 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 "http://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.
A bilingual version of this publication may be issued at a later date.
---------------------- Page: 8 ----------------------
– 7 – IEC 60728-3:2017 © IEC 2017
INTRODUCTION

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 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.
---------------------- Page: 9 ----------------------
– 8 – IEC 60728-3:2017 © IEC 2017
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –
Part 3: Active wideband equipment for cable networks
1 Scope

This part of IEC 60728 specifies the measuring methods, performance requirements and data

publication requirements for active wideband equipment of cable networks for television

signals, sound signals and interactive services.
This document
• applies to all amplifiers used in cable networks;
• covers the frequency range 5 MHz to 3 000 MHz;
NOTE The upper limit of 3 000 MHz is an example, but not a strict value.
• applies to one-way and two-way equipment;

• specifies the basic methods of measurement of the operational characteristics of the

active equipment in order to assess the performance of this equipment;

• identifies the performance specifications to be published by the manufacturers;

• states the minimum performance requirements of certain parameters.
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 60068-1, Environmental testing – Part 1: General and guidance
IEC 60068-2-1, Environmental testing – Part 2-1: Tests – Tests A: Cold
IEC 60068-2-2, Environmental testing – Part 2-2: Tests – Tests B: Dry heat

IEC 60068-2-6, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal)

IEC 60068-2-14, Environmental testing – Part 2-14: Tests – Test N: Change of temperature

IEC 60068-2-27, Environmental testing – Part 2-27: Tests – Test Ea and guidance: Shock

IEC 60068-2-30, Environmental testing – Part 2-30: Tests – Test dB: Damp heat, cyclic

(12 h + 12 h cycle)

IEC 60068-2-31, Environmental testing – Part 2-31: Tests – Test Ec: Rough handling shocks,

primarily for equipment-type specimens

IEC 60068-2-40, Basic environmental testing procedures – Part 2-40: Tests – Test Z/AM:

Combined cold/low air pressure tests
---------------------- Page: 10 ----------------------
– 9 – IEC 60728-3:2017 © IEC 2017
IEC 60529, Degrees of protection provided by enclosures (IP Code)

IEC 60728-2, Cable networks for television signals, sound signals and interactive services –

Part 2: Electromagnetic compatibility for equipment

IEC 60728-4, Cable networks for television signals, sound signals and interactive services –

Part 4: Passive wideband equipment for coaxial cable networks

IEC 60728-5, Cable networks for television signals, sound signals and interactive services –

Part 5: Headend equipment

IEC 60728-11, Cable networks for television signals, sound signals and interactive services –

Part 11: Safety

IEC 61000-4-5, Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement

techniques – Surge immunity test
IEC 61319-1, Interconnections of satellite receiving equipment – Part 1: Europe
IEC 61319-2, Interconnections of satellite receiving equipment – Part 2: Japan

IEC 62368-1, Audio/video, information and communication technology equipment – Part 1:

Safety requirements
3 Terms, definitions, symbols and abbreviated terms

For the purposes of this document, the following terms, definitions, symbols and abbreviated

terms apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Terms and definitions
3.1.1
amplitude frequency response
gain or loss of an equipment
...

IEC 60728-3
Edition 5.0 2017-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Cable networks for television signals, sound signals and interactive services –
Part 3: Active wideband equipment for cable networks
Réseaux de distribution par câbles pour signaux de télévision, signaux de
radiodiffusion sonore et services interactifs –
Partie 3: Matériel actif à large bande pour réseaux de distribution par câbles
IEC 60728-3:2017-11(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
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---------------------- Page: 2 ----------------------
IEC 60728-3
Edition 5.0 2017-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Cable networks for television signals, sound signals and interactive services –
Part 3: Active wideband equipment for cable networks
Réseaux de distribution par câbles pour signaux de télévision, signaux de
radiodiffusion sonore et services interactifs –
Partie 3: Matériel actif à large bande pour réseaux de distribution par câbles
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.060.40; 33.170 ISBN 978-2-8322-9260-0

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Marque déposée de la Commission Electrotechnique Internationale
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– 2 – IEC 60728-3:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 5

INTRODUCTION ..................................................................................................................... 7

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 8

3 Terms, definitions, symbols and abbreviated terms .......................................................... 9

3.1 Terms and definitions .............................................................................................. 9

3.2 Symbols ................................................................................................................ 12

3.3 Abbreviated terms ................................................................................................. 14

4 Methods of measurement .............................................................................................. 14

4.1 General ................................................................................................................. 14

4.2 Linear distortion .................................................................................................... 15

4.2.1 Return loss .................................................................................................... 15

4.2.2 Group delay variation .................................................................................... 15

4.3 Non-linear distortion.............................................................................................. 16

4.3.1 General ......................................................................................................... 16

4.3.2 Types of measurements ................................................................................. 16

4.3.3 Intermodulation .............................................................................................. 17

4.3.4 Composite triple beat ..................................................................................... 19

4.3.5 Composite second order beat ........................................................................ 22

4.3.6 Method of measurement of non-linearity for pure digital channel load ............ 22

4.3.7 Hum modulation of carrier .............................................................................. 30

4.4 Noise figure .......................................................................................................... 33

4.4.1 General ......................................................................................................... 33

4.4.2 Equipment required ....................................................................................... 33

4.4.3 Connection of equipment ............................................................................... 33

4.4.4 Measurement procedure ................................................................................ 34

4.5 Crosstalk attenuation ............................................................................................ 34

4.5.1 Crosstalk attenuation for loop-through ports .................................................. 34

4.5.2 Crosstalk attenuation for output ports ............................................................ 34

4.6 Measurement of noise power ratio (NPR) .............................................................. 36

4.6.1 General ......................................................................................................... 36

4.6.2 Equipment required ....................................................................................... 37

4.6.3 Connection of equipment ............................................................................... 37

4.6.4 Measurement procedure ................................................................................ 38

4.6.5 Presentation of the results ............................................................................. 38

4.7 Immunity to surge voltages ................................................................................... 39

4.7.1 General ......................................................................................................... 39

4.7.2 Equipment required ....................................................................................... 39

4.7.3 Connection of equipment ............................................................................... 39

4.7.4 Measurement procedure ................................................................................ 40

5 Equipment requirements ................................................................................................ 40

5.1 General requirements ........................................................................................... 40

5.2 Safety ................................................................................................................... 40

5.3 Electromagnetic compatibility (EMC) ..................................................................... 40

5.4 Frequency range ................................................................................................... 40

5.5 Impedance and return loss .................................................................................... 40

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IEC 60728-3:2017 © IEC 2017 – 3 –

5.6 Gain ...................................................................................................................... 41

5.6.1 Minimum and maximum gain .......................................................................... 41

5.6.2 Gain control ................................................................................................... 41

5.6.3 Slope and slope control ................................................................................. 41

5.7 Flatness ................................................................................................................ 41

5.8 Test points ............................................................................................................ 41

5.9 Noise figure .......................................................................................................... 41

5.10 Non-linear distortion.............................................................................................. 42

5.10.1 General ......................................................................................................... 42

5.10.2 Second-order distortion ................................................................................. 42

5.10.3 Third order distortion ..................................................................................... 42

5.10.4 Composite triple beat ..................................................................................... 42

5.10.5 Composite second order ................................................................................ 42

5.10.6 Maximum operating level for pure digital channel load ................................... 42

5.11 Hum modulation .................................................................................................... 43

5.12 Power supply ........................................................................................................ 43

5.13 Environmental ....................................................................................................... 43

5.13.1 General ......................................................................................................... 43

5.13.2 Transportation ............................................................................................... 43

5.13.3 Installation or maintenance ............................................................................ 43

5.13.4 Operation ...................................................................................................... 43

5.13.5 Energy efficiency of equipment ...................................................................... 44

5.14 Marking ................................................................................................................. 44

5.14.1 Marking of equipment .................................................................................... 44

5.14.2 Marking of ports ............................................................................................. 44

5.15 Requirements for multi-switches ........................................................................... 44

5.15.1 Control signals for multi-switches .................................................................. 44

5.15.2 Amplitude frequency response flatness .......................................................... 44

5.15.3 Return loss .................................................................................................... 44

5.15.4 Through loss .................................................................................................. 44

5.15.5 Isolation ......................................................................................................... 44

5.15.6 Crosstalk attenuation ..................................................................................... 44

5.15.7 Satellite IF to terrestrial signal isolation ......................................................... 45

5.16 Immunity to surge voltages ................................................................................... 45

5.16.1 Degrees of testing levels ............................................................................... 45

5.16.2 Recommendation of testing level degree ....................................................... 45

Annex A (normative) Test carriers, levels and intermodulation products ............................... 46

A.1 Two signal tests for second- and third-order products ........................................... 46

A.1.1 Intermodulation products with test signals at frequencies ƒ and ƒ ,
a b

see Table A.1 ................................................................................................ 46

A.1.2 Signal levels .................................................................................................. 46

A.2 Three signal tests for third order products – Intermodulation products with

test signals at frequencies ƒ , ƒ and ƒ , see Table A.2 and Figure A.3 .............. 47

a b c

Annex B (informative) Test frequency plan for composite triple beat (CTB), composite

second order (CSO) .............................................................................................................. 48

Annex C (informative) Measurement errors that occur due to mismatched equipment .......... 50

Annex D (informative) Examples of measurement channels ................................................. 51

D.1 Operating frequency range 110 MHz to 1 006 MHz ............................................... 51

D.2 Operating frequency range 110 MHz to 862 MHz .................................................. 51

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D.3 Operating frequency range 258 MHz to 1 218 MHz ............................................... 51

Bibliography .......................................................................................................................... 52

Figure 1 – Basic arrangement of test equipment for evaluation of the ratio of signal to

intermodulation product ........................................................................................................ 18

Figure 2 – Connection of test equipment for the measurement of non-linear distortion

by composite beat ................................................................................................................. 21

Figure 3 – BER measurement test configuration ................................................................... 24

Figure 4 – CINR measurement test setup .............................................................................. 28

Figure 5 – Plot of CINR in dB curve (forward path) versus EUT channel output signal

level in dBµV ........................................................................................................................ 29

Figure 6 – Carrier/hum ratio .................................................................................................. 30

Figure 7 – Test set-up for local-powered objects ................................................................... 31

Figure 8 – Test set-up for remote-powered objects ............................................................... 31

Figure 9 – Oscilloscope display ............................................................................................ 32

Figure 10 – Measurement of noise figure .............................................................................. 33

Figure 11 – Measurement of crosstalk attenuation for loop through ports of multi-

switches................................................................................................................................ 36

Figure 12 – Characteristic of the noise filter .......................................................................... 37

Figure 13 – Test setup for the non-linearity measurement ..................................................... 37

Figure 14 – Presentation of the result of NPR ........................................................................ 39

Figure 15 – Measurement set-up for surge immunity test ...................................................... 40

Figure A.1 – An example showing products formed when 2ƒ >ƒ ....................................... 46

a b

Figure A.2 – An example showing products formed when 2ƒ < ƒ ....................................... 47

a b

Figure A.3 – Products of the form ƒ ± ƒ ± ƒ ...................................................................... 47

a b c

Figure C.1 – Error concerning return loss measurement ....................................................... 50

Figure C.2 – Maximum ripple ................................................................................................ 50

Table 1 – Measurement parameters for full channel load ...................................................... 26

Table 2 – Notch filter frequencies ......................................................................................... 37

Table 3 – Example of return loss requirements ..................................................................... 41

Table 4 – Parameters of surge voltages for different degrees of testing levels ...................... 45

Table 5 – Recommendations for degree of testing levels ...................................................... 45

Table A.1 – Intermodulation products with two signals .......................................................... 46

Table A.2 – Intermodulation products with three signals ........................................................ 47

Table B.1 – Frequency allocation plan .................................................................................. 48

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IEC 60728-3:2017 © IEC 2017 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –
Part 3: Active wideband equipment for cable networks
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

co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

may participate in this preparatory work. International, governmental and non-governmental organizations liaising

with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

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transparently to the maximum extent possible in their national and regional publications. Any divergence between

any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

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services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.

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.

International Standard IEC 60728-3 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.

This fifth edition cancels and replaces the fourth edition published in 2010. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:

a) extension of upper frequency range limit for cable network equipment in the forward path

from 1 000 MHz to 1 218 MHz (optional up to 1 794 MHz);

b) extension of upper frequency range limit for cable network equipment in the return path from

85 MHz to 204 MHz;
c) integration and update of IEC 60728-3-1 content;

d) integration and update of the Technical Specification CLC/TS 50083-3-3 content;

e) deletion of specifications and test methods for obsolete analogue parameters;
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– 6 – IEC 60728-3:2017 © IEC 2017
f) additional normative references;
g) additional terms and definitions and abbreviations.
The text of this International Standard is based on the following documents:
FDIS Report on voting
100/2975/FDIS 100/2990/RVD

Full information on the voting for the approval of this International Standard can be found in the

report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

The list of all the 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 "http://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 60728-3:2017 © IEC 2017 – 7 –
INTRODUCTION

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 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.

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– 8 – IEC 60728-3:2017 © IEC 2017
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –
Part 3: Active wideband equipment for cable networks
1 Scope

This part of IEC 60728 specifies the measuring methods, performance requirements and data

publication requirements for active wideband equipment of cable networks for television signals,

sound signals and interactive services.
This document
• applies to all amplifiers used in cable networks;
• covers the frequency range 5 MHz to 3 000 MHz;
NOTE The upper limit of 3 000 MHz is an example, but not a strict value.
• applies to one-way and two-way equipment;

• specifies the basic methods of measurement of the operational characteristics of the active

equipment in order to assess the performance of this equipment;

• identifies the performance specifications to be published by the manufacturers;

• states the minimum performance requirements of certain parameters.
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
...

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