IEC 62272-2:2007

INTERNATIONAL IEC
STANDARD 62272-2
First edition
2007-03
Digital radio mondiale (DRM) –
Part 2:
Digital radio in the bands below 30 MHz –
Methods of measurement for DRM transmitters
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INTERNATIONAL IEC
STANDARD 62272-2
First edition
2007-03
Digital radio mondiale (DRM) –
Part 2:
Digital radio in the bands below 30 MHz –
Methods of measurement for DRM transmitters
© IEC 2007 ⎯ Copyright - all rights reserved
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mechanical, including photocopying and microfilm, without permission in writing from the publisher.
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– 2 – 62272-2 © IEC:2007(E)
CONTENTS
FOREWORD.3

1 Scope.5
2 Normative references.5
3 Terms, definitions and abbreviations .6
3.1 Terms and definitions .6
3.2 Abbreviations.6
4 General conditions of operation.7
5 General conditions of measurement .7
5.1 Input and output measurement arrangements .7
5.2 Temperature and humidity .8
5.3 Conditions for primary power supply.8
5.4 Output power.8
6 General characteristics .8
6.1 Output power.8
6.2 Frequency .9
7 Transmission performance characteristics .11
7.1 Spurious emissions.11
7.2 Out-of-band emissions (spectrum mask) .12
7.3 Modulation error ratio (MER).13
7.4 Bit error ratio (BER) .13
8 Protection against atmospheric discharge .14
9 Acoustic noise .15
10 Safety.15

Annex A (informative) Measuring arrangements.16
Annex B (informative) Out-of-band emission limits for DRM transmitters.18
Annex C (informative) Additional measuring details .20

Figure 1 – Spectrum occupancy for 9 kHz channels.10
Figure 2 – Spectrum occupancy for 10 kHz channels .10
Figure 3 – PRBS generator .14
Figure A.1 – Arrangement A .16
Figure A.2 – Arrangement B .16
Figure A.3 – Arrangement C.17
Figure A.4 – Arrangement D.17
Figure B.1 – Out-of-band emission limits (upper half only of a symmetrical spectrum
mask shown).18

Table B.1 – Out-of-band emission limits .18

62272-2 © IEC:2007(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL RADIO MONDIALE (DRM) –

Part 2: Digital radio in the bands below 30 MHz –
Methods of measurement for DRM transmitters

FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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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 62272-2 has been prepared by IEC technical committee 103:
Transmitting equipment for radiocommunication.
The text of this standard is based on the following documents:
FDIS Report on voting
103/64/FDIS 103/66/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – 62272-2 © IEC:2007(E)
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

62272-2 © IEC:2007(E) – 5 –
DIGITAL RADIO MONDIALE (DRM) –

Part 2: Digital radio in the bands below 30 MHz –
Methods of measurement for DRM transmitters

1 Scope
This part of IEC 62272 describes the methods of measurement to assess the performance
characteristics of digital modulated radio transmitters in the bands below 30 MHz for sound
and/or data broadcasting in the LF, MF and HF bands, and to facilitate the comparison of
measurements which are carried out by different personnel.
It contains details of specially selected methods for determining the most important
performance parameters of digital radio transmitters. The measurement methods described
apply to a limited number of performance parameters, i.e. those which can give rise to
ambiguous interpretation due to the use of different methods and conditions. They are neither
restrictive nor mandatory: measurements can be chosen for each particular case.
The measurement methods described in this standard are intended to be used for type
approval tests, quality control tests or acceptance test measurements in factories and on site.
Fewer or additional measurements may be carried out by agreement between customer and
supplier. Any additional test should comply with standards which have been established by
other study groups, subcommittees of the IEC or other international or suitably accredited
organizations.
This standard does not specify limiting values for acceptable performance as these are usually
given in the equipment specification or in requirements laid down by the responsible regulation
bodies. However, some values are quoted, where appropriate, for guidance in the presentation
of the results.
2 Normative references
The following referenced documents are indispensable for the application 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 60244-1, Methods of measurement for radio transmitters – Part 1: General characteristics
for broadcast transmitters
IEC 60244-15, Methods of measurement for radio transmitters – Part 15: Amplitude-modulated
transmitters for sound broadcasting
IEC 60215, Safety requirements for radio transmitting equipment
ITU Radio Regulations
ITU-R Recommendation V.663, Use of certain terms linked with physical quantities

– 6 – 62272-2 © IEC:2007(E)
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
DRM standard
digital modulation standard for frequencies in the bands below 30 MHz for the purposes of
audio and data broadcasting
3.1.2
DRM transmitters
sound broadcasting transmitters operating in the bands below 30 MHz and incorporating digital
modulation in accordance with IEC 62272-1
3.1.3
power definitions
nominal outpu
...