IEC 60728-12:2017

IEC 60728-12 ®
Edition 2.0 2017-06
INTERNATIONAL
STANDARD
Cable networks for television signals, sound signals and interactive services –
Part 12: Electromagnetic compatibility of systems
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IEC 60728-12 ®
Edition 2.0 2017-06
INTERNATIONAL
STANDARD
Cable networks for television signals, sound signals and interactive services –

Part 12: Electromagnetic compatibility of systems

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.060.40; 33.100.01 ISBN 978-2-8322-4364-0

– 2 – IEC 60728-12:2017 © IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, symbols and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 10
4 Methods of measurement . 11
4.1 Basic principles . 11
4.2 Radiation from cable networks . 11
4.2.1 General . 11
4.2.2 Field strength method . 11
4.2.3 Subcarrier measurement procedure . 13
4.2.4 GPS based leakage detection system . 13
4.3 Immunity of cable networks . 14
4.3.1 General . 14
4.3.2 Measurement procedure for interference caused by high-power local
outdoor transmitter . 14
5 Performance requirements. 14
5.1 General conditions . 14
5.2 Radiation from cable networks and other sources . 15
5.2.1 General . 15
5.2.2 Measurement of the total radiation . 15
5.2.3 Measurement of narrowband radiation . 15
5.3 Immunity of cable networks . 16
Annex A (informative) Information on legal requirements in some countries . 17
A.1 Legislation in Germany . 17
A.2 Requirements in Germany . 17
A.3 Reference for legislation in Germany . 19
Annex B (informative) Frequency ranges of typical safety of life services . 20
Annex C (informative) Interdependence between the maximum allowable field strength
and the minimum signal level at system outlet . 21
Annex D (normative) Measurements at other distances than the standard distance of
3 m . 23
D.1 Measurement at a reduced distance below 3 m . 23
D.2 Measurement at measurement distances above 3 m . 23
Annex E (informative) GPS based leakage detection system for cable networks . 24
E.1 General . 24
E.2 Automated data collection by driving through the HFC network . 24
E.3 Tagging of the signal . 24
E.4 Post-processing the collected data and visualization of leakages . 24
E.5 On-site location of the leak . 24
Bibliography . 25

Table 1 – Limits of total radiation . 15
Table 2 – Narrowband radiation limits . 15

Table 3 – Maximum expected field strength . 16
Table 4 – Required carrier-to-interference ratio . 16
Table A.1 – Protection of particular frequency ranges according to § 3 of the Order . 18
Table A.2 – Field strength limit values at a 3 m distance from line-bound
telecommunications facilities and networks . 19
Table B.1 – Frequency ranges of typical safety of life services . 20

– 4 – IEC 60728-12:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –

Part 12: Electromagnetic compatibility of systems

FOREWORD
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International Standard IEC 60728-12 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 second edition cancels and replaces the first edition published in 2001. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) IEC 60728-12 with its methods of measurement and EMC performance requirements is
explicitly dedicated to “under operating conditions (in situ)” to ensure the ongoing EMC
integrity of cable networks.
b) The first intermediate frequency range (1st IF range) for satellite signal transmission was
extended to cover now frequencies from 950 MHz up to 3 500 MHz.

c) The method of measurement and the requirements for in-band immunity were extended
taking into account the new EMC environment due to the allocation of broadband wireless
services in the frequency band 694 MHz to 862 MHz. As a consequence, the limits of in-
band immunity were specified for analogue and additionally for digital signals in this
frequency range.
d) The substitution method of measurement (power method) was deleted.
e) EMC measurements below 30 MHz were deleted.
f) New Annex D “Measurements at other distances than the standard distance of 3 m”.
g) New Annex E “GPS based leakage detection system for cable networks”.
The text of this International Standard is based on the following documents:
FDIS Report on voting
100/2895/FDIS 100/2926/RVD
Full information on the voting for the
...