CISPR TR 31:2012

Database on the characteristics of radio services

CISPR/TR 31:2012 covers the rationale behind the actual database covering the characteristics of radio services. The objective of the database is to register those characteristics which are relevant for derivation and specification of limits for disturbance emissions from electric and/or electronic equipment, systems and installations. Committees responsible for generic and/or product emission EMC standards should use this information together with CISPR 23. This second edition includes the replacement of CISPR 23 as reference standard for the determination of limits by CISPR 16-4-4:2007 on "model for the calculation of limits for the protection of radio services".

Base de données des caractéristiques des services radioélectriques

La CISPR/TR 31:2012 traite la justification sous-jacente à la base de données réelle traitant les caractéristiques des services radioélectriques. L'objectif de la base de données est d'enregistrer les caractéristiques pertinentes pour la détermination et la spécification des limites des émissions de perturbations provenant de matériels, systèmes et installations électriques et/ou électroniques. Il convient que les comités responsables des normes de CEM d'émission générique et/ou de produit utilisent cette information avec la CISPR 16-4-4. Cette deuxième édition annule et remplace la première édition parue en 2003. Cette édition inclut le remplacement de la CISPR 23 comme norme de référence pour la détermination des limites par la CISPR 16-4-4:2007 concernant "le modèle de calcul des limites pour la protection des services radioélectriques".

General Information

• Status: Published
• Publication Date: 17-Sep-2012
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.160 - Rotating machinery
• ICS: 33.100.10 - Emission
• Technical Committee: H - Limits for the protection of radio services
• Current Stage: PPUB - Publication issued
• Start Date: 18-Sep-2012
• Completion Date: 18-Sep-2012

Standards Content (Sample)

CISPR/TR 31
Edition 2.0 2012-09
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
colour
inside
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
Database on the characteristics of radio services
Base de données des caractéristiques des services radioélectriques
CISPR/TR 31:2012
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
CISPR/TR 31
Edition 2.0 2012-09
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
colour
inside
INTERNATIONAL SPECIAL COMMITTEE ON RADIO INTERFERENCE
COMITÉ INTERNATIONAL SPÉCIAL DES PERTURBATIONS RADIOÉLECTRIQUES
Database on the characteristics of radio services
Base de données des caractéristiques des services radioélectriques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX K
ICS 33.100.10 ISBN 978-2-83220-362-0

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
---------------------- Page: 3 ----------------------
– 2 – TR CISPR 31 © IEC:2012
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope ............................................................................................................................... 5

2 Normative references ....................................................................................................... 5

3 General ............................................................................................................................ 5

4 Outline of database .......................................................................................................... 5

5 Input to database ............................................................................................................. 8

6 Usage of database ........................................................................................................... 8

Annex A (informative) Reporting form .................................................................................... 9

Bibliography .......................................................................................................................... 10

Table 1 – Explanation of columns in the spreadsheet .............................................................. 5

Table 2 – Example based on the principles defined in Table 1 ................................................ 7

Table A.1 – Reporting form ..................................................................................................... 9

---------------------- Page: 4 ----------------------
TR CISPR 31 © IEC:2012 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DATABASE ON THE CHARACTERISTICS OF RADIO SERVICES
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

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The main task of IEC technical committees is to prepare International Standards. However, a

technical committee may propose the publication of a technical report when it has collected

data of a different kind from that which is normally published as an International Standard, for

example "state of the art".

CISPR 31, which is a technical report, has been prepared by CISPR subcommittee H: Limits

for the protection of radio services.

This second edition cancels and replaces the first edition published in 2003. This edition

constitutes a technical revision.

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

edition:

a) replacement of CISPR 23 as reference standard for the determination of limits by CISPR

16-4-4:2007 on "model for the calculation of limits for the protection of radio services".

---------------------- Page: 5 ----------------------
– 4 – TR CISPR 31 © IEC:2012
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
CISPR/H/228/DTR CISPR/H/234/RVC

Full information on the voting for the approval of this technical report 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.

The committee has decided that the contents of this publication will remain unchanged until

the stability 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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
---------------------- Page: 6 ----------------------
TR CISPR 31 © IEC:2012 – 5 –
DATABASE ON THE CHARACTERISTICS OF RADIO SERVICES
1 Scope

This Technical Report covers the rationale behind the actual database covering the

characteristics of radio services. The database is a “living document” in the format of a

spreadsheet file in the EMC Zone of the IEC web site (http://www.iec.ch/emc/database).

The objective of the database is to register those characteristics which are relevant for

derivation and specification of limits for disturbance emissions from electric and/or electronic

equipment, systems and installations. Committees responsible for generic and/or product

emission EMC standards should use this information together with CISPR 16-4-4.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any
amendments) applies.

CISPR 16-4-4:2007, Specification for radio disturbance and immunity measuring apparatus

and methods – Part 4-4: Uncertainties, statistics, and limit modelling – Statistics of complaints

and a model for the calculation of limits for the protection of radio services
3 General

The database content is comprised of objective radio system characteristics and subjective

information on typical intended usage.
4 Outline of database
The explanation of the columns in the spreadsheet is given in Table 1.
Table 1 – Explanation of columns in the spreadsheet
Characteristics Explanation/purpose
Radio system (name) Identification of the system
Reference document (specification) Reference to the system specification
Receiving frequency band (MHz) Frequency band in MHz specified by the band edge
frequencies

Field strength to protect or sensitivity Typically the lowest useable field strength or specified

sensitivity in dB(µV/m)
Protection ratio R (dB) Ratio of the minimum useable field strength for the
wanted RF signal to the maximum acceptable level of
an interfering signal
Receiving antenna gain Gr (dB) Typical gain in dB in the main lobe of an antenna
intended for use with a system
Receiving bandwidth Brec (kHz) Bandwidth in kHz between
“–3 dB” points
Isolation distance d (m) Typical distance in m between a receiver and a likely
source of interference
---------------------- Page: 7 ----------------------
– 6 – TR CISPR 31 © IEC:2012
Characteristics Explanation/purpose

Systematic isolation Is (dB) Typical extra isolation in dB because, for example, of

typical installation practice
Existing number of units Estimated number of units (expressed as less than 100,
or 100 up to 1 million or > 1 million)
Is it fixed or mobile? Is the typical application mobile or is it fixed?
If both then state both

Duty cycle (is the equipment always on, in stand-by or Percentage of time where the receiver is active

used off and on?)
Modulation Modulation scheme and duplex/simplex system

Is it a safety-related service? Is the service part of a security- or safety system?

Characteristics of most harmful interference An indication of what type of interference is the most

(modulation/bandwidth) harmful, e.g. broadband, narrowband, pulsed, CW etc.

Output power and effective radiated power (ERP) Transmitter output power or ERP from an integrated

system in W

Antenna characteristics (maximum gain) if different Typical gain in dB in the main lope of an antenna

from the RX antenna intended for use with the system

Usage area (country and/or region) Is the typical area of use restricted to one country,

region or is it worldwide
---------------------- Page: 8 ----------------------
TR CISPR 31 © IEC:2012 – 7 –
An example of the table based on the above principles is given in Table 2.
Table 2 – Example based on the principles defined in Table 1

Radio Reference Receiving Field Protection Receiving Receiving Isolation Systema- Existing Is it Receiver Modulation Is it a Characterist Output Antenna Usage

system document frequency strength to ratio antenna band- distance tic number fixed or operating safety- ics of most power and character- area

(name) (specificat band protect gain width d isolation of units mobile? period (is related harmful ERP istics (country

ion) MHz or Gr m Is the service interference (effective (max. and/or
dB Brec
sensitivity dB dB equipment (modulation/ radiated gain) if region)
kHz
Eo always on, bandwidth) power) different
in stand- W from the
dBµV/m by or used RX
off and antenna
on?)
En route 1 215 1 350 −7 10 35 360 5 000 18
radar
Radio 1 240 1 300 10 20 0,2 30 16 up to 1 fixed 10 % SSB, No 250 World-
−30
amateur million and CW, FM wide
mobile

DECT ETSI EN 1 880 1 900 60 10 0 1 000 3 6 > 1 both 100 % GMSK- No unknown 0,25 Europe

300175-2 TDMA
million
---------------------- Page: 9 ----------------------
– 8 – TR CISPR 31 © IEC:2012
5 Input to database

Input can be made by using the template (Annex A reporting form) and by forwarding the input

to the CISPR H Secretariat.
See Annex A.
6 Usage of database
The database is placed in the EMC zone of the IEC web site

(http://www.iec.ch/emc/database) and is freely accessible. Product committees preparing

EMC emission standards should consider at which frequency ranges their equipment are

likely to generate emissions. The relevant frequency ranges in this database should be

consulted in order to identify which radio services can be affected and which are the related

levels of tolerable interference. CISPR 16-4-4 shall be used for the principles of setting

emission limits based on the information in the database.
---------------------- Page: 10 ----------------------
TR CISPR 31 © IEC:2012 – 9 –
Annex A
(informative)
Reporting form

Please use the reporting form to fill in the required information and return it either on a disc or

by e-mail. Your information for the database will not be scrutinized.
The following characteristics shall be included (see Table A.1).
Table A.1 – Reporting form
Characteristics Input column Explanation/purpose
Radio system (name) Identification of the system
Reference document (specification) Reference to the system specification
Receiving frequency band (MHz) Frequency band in MHz specified by the band
edge frequencies

Field strength to protect or Typically the lowest useable field strength or

sensitivity Eo(dBµV/m) specified sensitivity in dB(µV/m)
Protection ratio R (dB) Ratio of the minimum useable field strength for
the wanted RF signal to the maximum
acceptable level of an interfering signal
Receiving antenna gain Gr (dB) Typical gain in dB in the main lobe of an
antenna intended for use with a system
Receiving bandwidth Brec (kHz) Bandwidth in kHz between
“–3 dB” points
Isolation distance d (m)
...