IEC 60728-3:2017

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

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
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.060.40 - Cabled distribution systems
• ICS: 33.170 - Television and radio broadcasting
• Technical Committee: TA 5 - Cable networks for television signals, sound signals and interactive services
• Drafting Committee: WG 3 - TC 100/TA 5/WG 3
• Current Stage: PPUB - Publication issued
• Start Date: 17-Nov-2017
• Completion Date: 27-Nov-2017

Relations

• Replaces: IEC 60728-3-1:2012 - Cable networks for television signals, sound signals and interactive services - Part 3-1: Active wideband equipment for cable networks - Methods of measurement of non-linearity for full digital channel load with DVB-C signals
• Effective Date: 05-Sep-2023
• Revises: IEC 60728-3:2010 - Cable networks for television signals, sound signals and interactive services - Part 3: Active wideband equipment for cable networks
• Effective Date: 05-Sep-2023

Standards Content (Sample)

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
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

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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

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.060.40; 33.170 ISBN 978-2-8322-4934-5

– 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

– 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 11
...

IEC 60728-3 ®
Edition 5.0 2017-11
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Cable networks for television signals, sound signals and interactive services
Part 3: Active wideband equipment for cable networks

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

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documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

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variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
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IEC 60728-3 ®
Edition 5.0 2017-11
REDLINE VERSION
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 978-2-8322-5101-0

– 2 – IEC 60728-3:2017 RLV © IEC 2017
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions, symbols and abbreviated terms . 11
3.1 Terms and definitions . 11
3.2 Symbols . 15
3.3 Abbreviated terms . 17
4 Methods of measurement . 18
4.1 General . 18
4.2 Linear distortion . 18
4.2.1 Return loss . 18
4.2.2 Group delay variation . 20
4.3 Non-linear distortion. 21
4.3.1 General . 21
4.3.2 Types of measurements . 22
4.3.3 Intermodulation . 22
4.3.4 Composite triple beat . 24
4.3.5 Composite second order beat . 27
4.3.6 Method of measurement of non-linearity for pure digital channel load . 31
4.3.7 Hum modulation of carrier . 38
4.4 Automatic gain and slope control step response .
4.4 Noise figure . 44
4.4.1 General . 44
4.4.2 Equipment required . 44
4.4.3 Connection of equipment . 44
4.4.4 Measurement procedure . 44
4.5 Crosstalk attenuation . 44
4.5.1 Crosstalk attenuation for loop-through ports . 44
4.5.2 Crosstalk attenuation for output ports . 45
4.6 Measurement of composite intermodulation noise ratio (CINR) noise power
ratio (NPR) . 47
4.6.1 General . 47
4.6.2 Equipment required . 48
4.6.3 Connection of equipment . 49
4.6.4 Measurement procedure . 49
4.6.5 Presentation of the results . 50
4.7 Signal level for digitally modulated signals .
4.7 Immunity to surge voltages . 52
4.7.1 General . 52
4.7.2 Equipment required . 52
4.7.3 Connection of equipment . 52
4.7.4 Measurement procedure . 52
5 Equipment requirements . 53
5.1 General requirements . 53
5.2 Safety . 53

– 3 – IEC 60728-3:2017 RLV © IEC 2017
5.3 Electromagnetic compatibility (EMC) . 53
5.4 Frequency range . 53
5.5 Impedance and return loss . 53
5.6 Gain . 54
5.6.1 Minimum and maximum gain . 54
5.6.2 Gain control . 54
5.6.3 Slope and slope control . 54
5.7 Flatness . 55
5.8 Test points . 55
5.9 Group delay .
5.9 Noise figure . 55
5.10 Non-linear distortion. 55
5.10.1 General . 55
5.10.2 Second-order distortion . 55
5.10.3 Third order distortion . 56
5.10.4 Composite triple beat . 56
5.10.5 Composite second order . 56
5.10.6 Maximum operating level for pure digital channel load . 56
5.11 Hum modulation . 57
5.12 Automatic gain and slope control .
5.12 Power supply . 57
5.13 Environmental . 57
5.13.1 General . 57
5.13.2 Transportation . 57
5.13.3 Installation or maintenance . 57
5.13.4 Operation . 57
5.13.5 Energy efficiency of equipment . 58
5.14 Marking . 58
5.14.1 Marking of equipment . 58
5.14.2 Marking of ports . 58
5.15 Requirements for multi-switches . 58
5.15.1 Control signals for multi-switches . 58
5.15.2 Amplitude frequency response flatness . 58
5.15.3 Return loss . 58
5.15.4 Through loss . 58
5.15.5 Isolation . 58
5.15.6 Crosstalk attenuation . 59
5.15.7 Satellite IF to terrestrial signal isolation . 59
5.16 Immunity to surge voltages . 59
5.16.1 Degrees of testing levels . 59
5.16.2 Recommendation of testing level degree . 59
5.17 Mean operating time between failure (MTBF) .
Annex A (informative) Derivation of non-linear distortion .
Annex A (normative) Test carriers, levels and intermodulation products . 63
A.1 Two signal tests for second- and third-order products . 63
A.1.1 Intermodulation products with test signals at frequencies ƒ and ƒ
a b
see Table A.1 . 63
A.2 Three
...

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

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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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

– 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

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 .
...