ETSI EN 301 357 V2.1.1 (2017-06)
Cordless audio devices in the range 25 MHz to 2 000 MHz; Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU
Cordless audio devices in the range 25 MHz to 2 000 MHz; Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU
REN/ERM-TG17-19-2
Brezvrvične avdio naprave za frekvenčno območje od 25 MHz do 2000 MHz - Harmonizirani standard, ki zajema bistvene zahteve člena 3.2 direktive 2014/53/EU
Ta dokument določa tehnične lastnosti in merilne metode za brezvrvične avdio naprave za frekvenčno območje od 25–2000 MHz, vključno s/z:
• brezvrvičnimi slušalkami;
• brezvrvičnimi zvočniki;
• potrošniškimi radijskimi mikrofoni v območju 863–865 MHz;
• slušno opremo za spremljanje, ki uporablja 300 kHz analogno modulacijo ali 300 kHz, 600 kHz,
1200 kHz digitalno modulacijo FDMA v območju 863–865 MHz;
• brezvrvičnimi napravami v vozilih;
• osebnimi brezvrvičnimi napravami;
• širokopasovnimi večkanalnimi avdio sistemi;
• napravami majhne moči (LPD) II. pasu v območju 87,5–108 MHz (radiodifuzijski pas II), ki uporabljajo pasovno širino do 200 kHz in analogno modulacijo;
• drugimi napravami in frekvenčnimi pasovi, ki so določeni v CEPT/ERC/REC 70-03 [i.2], evropskih ali nacionalnih predpisih.
OPOMBA 1: Frekvenčni pasovi za to opremo se lahko razlikujejo od države do države, kot je določeno v nacionalnih predpisih. Vsa oprema je namenjena uporabi z vgrajenimi antenami.
General Information
Standards Content (Sample)
Draft ETSI EN 301 357 V2.0.1 (2017-03)
HARMONISED EUROPEAN STANDARD
Cordless audio devices in the range 25 MHz to 2 000 MHz;
Harmonised Standard covering the essential requirements
of article 3.2 of Directive 2014/53/EU
2 Draft ETSI EN 301 357 V2.0.1 (2017-03)
Reference
REN/ERM-TG17-19-2
Keywords
audio, harmonised standard, radio, radio MIC,
testing
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
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Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
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If you find errors in the present document, please send your comment to one of the following services:
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Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2017.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 Draft ETSI EN 301 357 V2.0.1 (2017-03)
Contents
Intellectual Property Rights . 7
Foreword . 7
Modal verbs terminology . 7
Introduction . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definitions, symbols and abbreviations . 10
3.1 Definitions . 10
3.2 Symbols . 11
3.3 Abbreviations . 11
4 Technical requirements specifications . 12
4.0 General . 12
4.1 Cordless audio . 12
4.1.1 In-vehicle cordless . 12
4.1.2 Personal cordless . 12
4.1.3 Broadband multi channel audio systems . 12
4.1.4 Band II LPD . 12
4.2 Consumer radio microphones . 12
4.3 In-ear monitoring . 12
4.4 Environmental profile . 12
5 Testing for compliance with technical requirements . 13
5.1 Presentation of equipment for testing purposes . 13
5.1.1 Introduction. 13
5.1.2 Choice of model for performance testing . 13
5.1.3 Definitions of alignment and switching ranges . 13
5.1.4 Alignment Range . 14
5.1.5 Choice of frequencies . 14
5.1.5.0 General . 14
5.1.5.1 Testing of single channel equipment . 14
5.1.5.2 Testing of two channel equipment . 14
5.1.5.3 Testing of multi-channel equipment (more than two channels) . 14
5.1.6 Testing of equipment with an external frequency control . 14
5.1.7 Testing of equipment with an integral antenna . 15
5.1.7.0 General . 15
5.1.7.1 Equipment with a permanent internal RF port . 15
5.1.7.2 Equipment with a temporary RF port . 15
5.2 Mechanical and electrical design . 15
5.2.1 General . 15
5.2.2 Physical Controls . 15
5.2.3 Performance testing with integral antenna . 15
6 Test conditions, power sources and ambient conditions . 15
6.1 Normal and extreme test-conditions . 15
6.2 Test power source . 16
6.3 Normal test conditions . 16
6.3.1 Normal temperature and humidity . 16
6.3.2 Normal test power source voltage . 16
6.3.2.1 Mains voltage . 16
6.3.2.2 Nickel-cadmium cells. 16
6.3.2.3 Other power sources . 16
6.4 Extreme test conditions . 17
ETSI
4 Draft ETSI EN 301 357 V2.0.1 (2017-03)
6.4.1 General . 17
6.4.2 Extreme temperatures . 17
6.4.2.0 General . 17
6.4.2.1 Procedures for tests at extreme temperatures . 17
6.4.3 Extreme test power source voltages . 17
6.4.3.1 Mains voltage . 17
6.4.3.2 Re-chargeable battery power sources . 17
6.4.3.3 Power sources using other types of batteries . 17
6.4.3.4 Other power sources . 18
7 General conditions for testing . 18
7.1 Band II LPD . 18
7.2 Normal test modulation . 18
7.3 Test fixture . 19
7.4 Test site and general arrangements for radiated measurements. 20
7.5 Modes of operation of the transmitter . 20
7.6 Arrangement for test signals at the input of the transmitter . 20
8 Methods of measurement and limits for transmitter parameters . 20
8.1 General . 20
8.2 Basic requirements for Band II LPD . 21
8.3 Methods of measurement and limits for transmitter parameters of Band II LPD . 21
8.3.1 General . 21
8.3.2 Test site and general arrangements for radiated measurements . 21
8.3.3 Test modulation . 22
8.3.4 Effective radiated power (e.r.p.) . 22
8.3.4.1 Definition . 22
8.3.4.2 Test procedure . 22
8.3.4.3 Limits . 22
8.3.4.4 Measurement uncertainty . 22
8.3.5 Occupied bandwidth . 23
8.3.5.1 Definition . 23
8.3.5.2 Test procedure . 23
8.3.5.3 Limits . 23
8.3.5.4 Measurement uncertainty . 23
8.3.6 Frequency error . 23
8.3.6.1 Definition . 23
8.3.6.2 Test procedure . 24
8.3.6.3 Limits . 24
8.3.6.4 Measurement uncertainty . 24
8.3.7 Transmitter timeout. 24
8.3.7.1 Definitions . 24
8.3.7.2 Test procedure . 24
8.3.7.3 Limits . 25
8.3.7.4 Measurement uncertainty . 25
8.3.8 Radiated spurious emissions . 25
8.3.8.1 Definition . 25
8.3.8.2 Measurement procedure . 25
8.3.8.3 Limits . 25
8.3.8.3.1 Band II LPD . 25
8.3.8.3.2 Combined equipments . 25
8.3.8.4 Measurement uncertainty . 26
8.4 Frequency error . 26
8.4.1 General . 26
8.4.2 Definition . 26
8.4.3 Method of measurement . 26
8.4.4 Limit . 26
8.5 Carrier power . 26
8.5.1 General . 26
8.5.2 Definition . 26
8.5.3 Method of measurement for equipment with integral antenna. 27
8.5.3.1 Method of measurement under normal test conditions . 27
ETSI
5 Draft ETSI EN 301 357 V2.0.1 (2017-03)
8.5.3.2 Method of measurement under extreme test conditions . 27
8.5.4 Limit . 28
8.6 Channel bandwidth . 28
8.6.1 General . 28
8.6.2 Definition . 28
8.6.3 Measurement of Necessary Bandwidth (BN) . 28
8.6.4 Limits . 29
8.7 Spurious emissions and cabinet radiation . 30
8.7.1 Definition . 30
8.7.2 Method of measuring the effective radiated power . 30
8.7.3 Limits . 31
8.7.4 Measuring receiver . 31
8.8 Cordless audio transmitter shutoff . 31
8.8.1 General . 31
8.8.2 Definition . 31
8.8.3 Method of measurement . 31
8.8.4 Limits . 31
9 Receiver . 32
9.1 General . 32
9.2 Spurious emissions and cabinet radiation . 32
9.2.1 Definition . 32
9.2.2 Method of measuring the power level in a specified load. 32
9.2.3 Method of measuring the effective radiated power of the enclosure . 32
9.2.4 Method of measuring the effective radiated power . 33
9.2.5 Limits . 33
9.3 Receiver sensitivity . 33
9.3.1 Definition . 33
9.3.2 Method of measurement . 33
9.3.3 Limits . 34
9.4 Receiver adjacent channel selectivity . 34
9.4.1 Definition . 34
9.4.2 Method of measurement . 34
9.4.3 Limits . 35
9.5 Receiver blocking . 35
9.5.1 Definition . 35
9.5.2 Method of measurement . 35
9.5.3 Limits . 36
10 Measurement uncertainty . 36
10.1 Compliance assessment when measurement uncertainty is equal to or less than maximum acceptable
uncertainty . 36
10.2 Compliance assessment when measurement uncertainty is greater than maximum acceptable uncertainty . 36
10.3 Maximum allowable measurement uncertainties for cordless audio and radio microphones. 37
10.4 Maximum allowable measurement uncertainties for Band II LPD . 37
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 38
Annex B (normative): Measurement of Necessary Bandwidth (B) for analogue systems . 40
B.1 Test configuration for measurement of the Necessary Bandwidth (B) for analogue systems . 40
Annex C (normative): Radiated measurement . 41
C.1 Test sites and general arrangements for measurements involving the use of radiated fields . 41
C.1.1 General . 41
C.1.2 Anechoic chamber . 41
C.1.3 Anechoic chamber with a conductive ground plane . 42
C.1.4 Open Area Test Site (OATS) . 43
C.1.5 Test antenna . 44
C.1.6 Substitution antenna . 44
C.1.7 Measuring antenna . 45
ETSI
6 Draft ETSI EN 301 357 V2.0.1 (2017-03)
C.1.8 Stripline arrangement . 45
C.1.8.1 General . 45
C.1.8.2 Description . 45
C.1.8.3 Calibration . 45
C.1.8.4 Mode of use . 45
C.2 Guidance on the use of radiation test sites . 45
C.2.1 General . 45
C.2.2 Verification of the test site . 45
C.2.3 Preparation of the DUT . 46
C.2.4 Power supplies to the DUT. 46
C.2.5 Volume control setting for analogue speech tests . 46
C.2.6 Range length . 46
C.2.7 Site preparation . 47
C.3 Coupling of signals . 47
C.3.1 General . 47
C.3.2 Data signals . 47
C.3.3 Speech and analogue signals . 48
C.3.3.0 General . 48
C.3.3.1 Acoustic coupler description. 48
C.3.3.2 Calibration . 48
C.4 Standard test position . 48
C.5 Test fixture . 49
C.5.1 General . 49
C.5.2 Description . 49
C.5.3 Calibration . 50
C.5.4 Mode of use . 50
Annex D (informative): Derivation of radiated spurious emissions limit for Band II LPD . 51
Annex E (informative): Justifications for field strength measurement . 52
Annex F (informative): Typical test layout . 53
F.1 Use of vehicle power leads . 53
Annex G (informative): Bibliography . 54
Annex H (informative): Change History . 55
History . 56
ETSI
7 Draft ETSI EN 301 357 V2.0.1 (2017-03)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This draft Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM), and is now submitted for the combined Public Enquiry and Vote
phase of the ETSI standards EN Approval Procedure.
The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.9] to
provide one voluntary means of conforming to the essential requirements of Directive 2014/53/EU on the harmonisation
of the laws of the Member States relating to the making available on the market of radio equipment and repealing
Directive 1999/5/EC [i.1].
Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with
the normative clauses of the present document given in table A.1 and table A.2 confers, within the limits of the scope of
the present document, a presumption of conformity with the corresponding essential requirements of that Directive and
associated EFTA regulations.
Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 18 months after doa
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The present document applies to cordless audio devices in the range 25 MHz to 2 000 MHz.
The present document contains requirements to demonstrate that radio equipment both effectively uses and supports the
efficient use of radio spectrum in order to avoid harmful interference.
ETSI
8 Draft ETSI EN 301 357 V2.0.1 (2017-03)
1 Scope
The present document specifies technical characteristics and methods of measurements for cordless audio devices in the
range 25 MHz to 2 000 MHz, including:
• cordless headphones;
• cordless loudspeakers;
• consumer radio microphones in the range 863 MHz to 865 MHz;
• in-ear monitoring equipment using either 300 kHz bandwidth analogue modulation or 300 kHz, 600 kHz,
1 200 kHz digital FDMA modulation in the range 863 MHz to 865 MHz;
• in-vehicle cordless;
• personal cordless;
• broadband multi channel audio systems;
• Band II LPD (low power devices) in the 87,5 MHz to 108 MHz range (Broadcasting Band II) using up to
200 kHz bandwidth and analogue modulation;
• and other devices and frequency bands defined within CEPT/ERC/REC 70-03 [i.2], European or National
regulation.
NOTE 1: The frequency bands for this equipment may differ from country to country as specified in their national
regulations. All equipment is intended to be used with integral antennas.
Table 1: Radiocommunications service frequency bands
Radiocommunications service frequency bands
Transmit 25 MHz to 2 000 MHz
Receive 25 MHz to 2 000 MHz
NOTE 2: Cordless audio devices covered within the present document are considered, by definition, Short Range
Devices (SRD), the power limits for different frequency bands can be found in the current version of
CEPT/ERC/REC 70-03 [i.2], annex 13 (or European or national regulations).
NOTE 3: Electromagnetic Compatibility (EMC) requirements are covered by ETSI EN 301 489-9 [i.4].
2 References
2.1 Normative references
References are specific, identified by date of publication and/or edition number or version number. Only the cited
version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] Recommendation ITU-R BS.559-2 (1990): "Objective measurement of radio-frequency protection
ratios in LF, MF and HF broadcasting".
ETSI
9 Draft ETSI EN 301 357 V2.0.1 (2017-03)
[2] IEC 60244-13 (1991): "Methods of measurement for radio transmitters - Part 13: Performance
characteristics for FM sound broadcasting".
[3] ANSI C63.5 (2006): "American National Standard for Calibration of Antennas Used for Radiated
Emission Measurements in Electro Magnetic Interference".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
radio equipment and repealing Directive 1999/5/EC.
[i.2] CEPT/ERC/REC 70-03 relating to the use of Short Range Devices (SRD), annex 13.
[i.3] ETSI EN 300 220 (all parts): "Short Range Devices (SRD) operating in the frequency range
25 MHz to 1 000 MHz".
[i.4] ETSI EN 301 489-9: "ElectroMagnetic Compatibility (EMC) standard for radio equipment and
services; Part 9: Specific conditions for wireless microphones, similar Radio Frequency (RF)
audio link equipment, cordless audio and in-ear monitoring devices; Harmonised Standard
covering the essential requirements of article 3.1(b) of Directive 2014/53/EU".
[i.5] ETSI EN 301 908-1: "IMT cellular networks; Harmonised Standard covering the essential
requirements of article 3.2 of the Directive 2014/53/EU; Part 1: Introduction and common
requirements".
[i.6] ETSI EN 301 511: "Global System for Mobile communications (GSM); Mobile Stations (MS)
equipment; Harmonised Standard covering the essential requirements of article 3.2 of Directive
2014/53/EU".
[i.7] ETSI EN 301 489-1: "ElectroMagnetic Compatibility (EMC) standard for radio equipment and
services; Part 1: Common technical requirements; Harmonised Standard covering the essential
requirements of article 3.1(b) of Directive 2014/53/EU and the essential requirements of article 6
of Directive 2014/30/EU".
[i.8] CEPT/ECC Report 73: "Compatibility of SRD in the FM radio broadcasting band".
[i.9] Commission Implementing Decision C(2015) 5376 final of 4.8.2015 on a standardisation request
to the European Committee for Electrotechnical Standardisation and to the European
Telecommunications Standards Institute as regards radio equipment in support of Directive
2014/53/EU of the European Parliament and of the Council.
[i.10] European Commission: "The 'Blue Guide' on the implementation of EU products rules 2016
(2016/C 272/01)".
[i.11] ETSI TR 102 273 (all parts) (2001): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Improvement on Radiated Methods of Measurement (using test site) and evaluation of the
corresponding measurement uncertainties".
[i.12] ETSI TR 100 028 (all parts) (12-2001): "Electromagnetic compatibility and Radio spectrum
Matters (ERM); Uncertainties in the measurement of mobile radio equipment characteristics".
ETSI
10 Draft ETSI EN 301 357 V2.0.1 (2017-03)
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
allocated or applicable band: frequency band as defined in radio regulations of national administrations
artificial antenna: tuned reduced-radiating dummy load equal to the nominal impedance specified by the manufacturer
Broadband multi channel audio systems: used for the transmission of high quality digital audio. These can be e.g.
surround sound systems or uncompressed audio
channel bandwidth: frequency band of defined width including safety margin for operation on adjacent channels,
located symmetrically around the carrier frequency
consumer radio microphones: intended for non professional applications
cordless: link between at least two entities that does not require physical connection
NOTE: While the term "cordless" can refer to infra-red and other non-RF "wireless" links, in the context of the
present document it is restricted to RF operating systems only.
integral antenna: antenna, with or without a connector, designed as, and declared as by the manufacturer, an
indispensable part of the equipment
integral antenna for Band II LPD only: permanent fixed antenna, which may be built-in, designed as an
indispensable part of the equipment
In-ear monitoring: equipment which
...
HARMONISED EUROPEAN STANDARD
Cordless audio devices in the range 25 MHz to 2 000 MHz;
Harmonised Standard covering the essential requirements
of article 3.2 of Directive 2014/53/EU
2 ETSI EN 301 357 V2.1.1 (2017-06)
Reference
REN/ERM-TG17-19-2
Keywords
audio, harmonised standard, radio, radio MIC,
testing
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2017.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M logo is protected for the benefit of its Members
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 ETSI EN 301 357 V2.1.1 (2017-06)
Contents
Intellectual Property Rights . 7
Foreword . 7
Modal verbs terminology . 7
Introduction . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definitions, symbols and abbreviations . 10
3.1 Definitions . 10
3.2 Symbols . 11
3.3 Abbreviations . 11
4 Technical requirements specifications . 12
4.0 General . 12
4.1 Cordless audio . 12
4.1.1 In-vehicle cordless . 12
4.1.2 Personal cordless . 12
4.1.3 Broadband multi channel audio systems . 12
4.1.4 Band II LPD . 12
4.2 Consumer radio microphones . 12
4.3 In-ear monitoring . 12
4.4 Environmental profile . 12
5 Testing for compliance with technical requirements . 13
5.1 Presentation of equipment for testing purposes . 13
5.1.1 Introduction. 13
5.1.2 Choice of model for performance testing . 13
5.1.3 Definitions of alignment and switching ranges . 13
5.1.4 Alignment Range . 14
5.1.5 Choice of frequencies . 14
5.1.5.0 General . 14
5.1.5.1 Testing of single channel equipment . 14
5.1.5.2 Testing of two channel equipment . 14
5.1.5.3 Testing of multi-channel equipment (more than two channels) . 14
5.1.6 Testing of equipment with an external frequency control . 14
5.1.7 Testing of equipment with an integral antenna . 15
5.1.7.0 General . 15
5.1.7.1 Equipment with a permanent internal RF port . 15
5.1.7.2 Equipment with a temporary RF port . 15
5.2 Mechanical and electrical design . 15
5.2.1 General . 15
5.2.2 Physical Controls . 15
5.2.3 Performance testing with integral antenna . 15
6 Test conditions, power sources and ambient conditions . 15
6.1 Normal and extreme test-conditions . 15
6.2 Test power source . 16
6.3 Normal test conditions . 16
6.3.1 Normal temperature and humidity . 16
6.3.2 Normal test power source voltage . 16
6.3.2.1 Mains voltage . 16
6.3.2.2 Nickel-cadmium cells. 16
6.3.2.3 Other power sources . 16
6.4 Extreme test conditions . 17
ETSI
4 ETSI EN 301 357 V2.1.1 (2017-06)
6.4.1 General . 17
6.4.2 Extreme temperatures . 17
6.4.2.0 General . 17
6.4.2.1 Procedures for tests at extreme temperatures . 17
6.4.3 Extreme test power source voltages . 17
6.4.3.1 Mains voltage . 17
6.4.3.2 Re-chargeable battery power sources . 17
6.4.3.3 Power sources using other types of batteries . 17
6.4.3.4 Other power sources . 18
7 General conditions for testing . 18
7.1 Band II LPD . 18
7.2 Normal test modulation . 18
7.3 Test fixture . 19
7.4 Test site and general arrangements for radiated measurements. 20
7.5 Modes of operation of the transmitter . 20
7.6 Arrangement for test signals at the input of the transmitter . 20
8 Methods of measurement and limits for transmitter parameters . 20
8.1 General . 20
8.2 Basic requirements for Band II LPD . 21
8.3 Methods of measurement and limits for transmitter parameters of Band II LPD . 21
8.3.1 General . 21
8.3.2 Test site and general arrangements for radiated measurements . 21
8.3.3 Test modulation . 22
8.3.4 Effective radiated power (e.r.p.) . 22
8.3.4.1 Definition . 22
8.3.4.2 Test procedure . 22
8.3.4.3 Limits . 22
8.3.4.4 Measurement uncertainty . 22
8.3.5 Occupied bandwidth . 23
8.3.5.1 Definition . 23
8.3.5.2 Test procedure . 23
8.3.5.3 Limits . 23
8.3.5.4 Measurement uncertainty . 23
8.3.6 Frequency error . 23
8.3.6.1 Definition . 23
8.3.6.2 Test procedure . 24
8.3.6.3 Limits . 24
8.3.6.4 Measurement uncertainty . 24
8.3.7 Transmitter timeout. 24
8.3.7.1 Definitions . 24
8.3.7.2 Test procedure . 24
8.3.7.3 Limits . 25
8.3.7.4 Measurement uncertainty . 25
8.3.8 Radiated spurious emissions . 25
8.3.8.1 Definition . 25
8.3.8.2 Measurement procedure . 25
8.3.8.3 Limits . 25
8.3.8.3.1 Band II LPD . 25
8.3.8.3.2 Combined equipments . 25
8.3.8.4 Measurement uncertainty . 26
8.4 Frequency error . 26
8.4.1 General . 26
8.4.2 Definition . 26
8.4.3 Method of measurement . 26
8.4.4 Limit . 26
8.5 Carrier power . 26
8.5.1 General . 26
8.5.2 Definition . 26
8.5.3 Method of measurement for equipment with integral antenna. 27
8.5.3.1 Method of measurement under normal test conditions . 27
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5 ETSI EN 301 357 V2.1.1 (2017-06)
8.5.3.2 Method of measurement under extreme test conditions . 27
8.5.4 Limit . 28
8.6 Channel bandwidth . 28
8.6.1 General . 28
8.6.2 Definition . 28
8.6.3 Measurement of Necessary Bandwidth (BN) . 28
8.6.4 Limits . 29
8.7 Spurious emissions and cabinet radiation . 30
8.7.1 Definition . 30
8.7.2 Method of measuring the effective radiated power . 30
8.7.3 Limits . 31
8.7.4 Measuring receiver . 31
8.8 Cordless audio transmitter shutoff . 31
8.8.1 General . 31
8.8.2 Definition . 31
8.8.3 Method of measurement . 31
8.8.4 Limits . 31
9 Receiver . 32
9.1 General . 32
9.2 Spurious emissions and cabinet radiation . 32
9.2.1 Definition . 32
9.2.2 Method of measuring the power level in a specified load. 32
9.2.3 Method of measuring the effective radiated power of the enclosure . 32
9.2.4 Method of measuring the effective radiated power . 33
9.2.5 Limits . 33
9.3 Receiver sensitivity . 33
9.3.1 Definition . 33
9.3.2 Method of measurement . 33
9.3.3 Limits . 34
9.4 Receiver adjacent channel selectivity . 34
9.4.1 Definition . 34
9.4.2 Method of measurement . 34
9.4.3 Limits . 35
9.5 Receiver blocking . 35
9.5.1 Definition . 35
9.5.2 Method of measurement . 35
9.5.3 Limits . 36
10 Measurement uncertainty . 36
10.1 Compliance assessment when measurement uncertainty is equal to or less than maximum acceptable
uncertainty . 36
10.2 Compliance assessment when measurement uncertainty is greater than maximum acceptable uncertainty . 36
10.3 Maximum allowable measurement uncertainties for cordless audio and radio microphones. 37
10.4 Maximum allowable measurement uncertainties for Band II LPD . 37
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 38
Annex B (normative): Measurement of Necessary Bandwidth (B) for analogue systems . 40
B.1 Test configuration for measurement of the Necessary Bandwidth (B) for analogue systems . 40
Annex C (normative): Radiated measurement . 41
C.1 Test sites and general arrangements for measurements involving the use of radiated fields . 41
C.1.1 General . 41
C.1.2 Anechoic chamber . 41
C.1.3 Anechoic chamber with a conductive ground plane . 42
C.1.4 Open Area Test Site (OATS) . 43
C.1.5 Test antenna . 44
C.1.6 Substitution antenna . 44
C.1.7 Measuring antenna . 45
ETSI
6 ETSI EN 301 357 V2.1.1 (2017-06)
C.1.8 Stripline arrangement . 45
C.1.8.1 General . 45
C.1.8.2 Description . 45
C.1.8.3 Calibration . 45
C.1.8.4 Mode of use . 45
C.2 Guidance on the use of radiation test sites . 45
C.2.1 General . 45
C.2.2 Verification of the test site . 45
C.2.3 Preparation of the DUT . 46
C.2.4 Power supplies to the DUT. 46
C.2.5 Volume control setting for analogue speech tests . 46
C.2.6 Range length . 46
C.2.7 Site preparation . 47
C.3 Coupling of signals . 47
C.3.1 General . 47
C.3.2 Data signals . 47
C.3.3 Speech and analogue signals . 48
C.3.3.0 General . 48
C.3.3.1 Acoustic coupler description. 48
C.3.3.2 Calibration . 48
C.4 Standard test position . 48
C.5 Test fixture . 49
C.5.1 General . 49
C.5.2 Description . 49
C.5.3 Calibration . 50
C.5.4 Mode of use . 50
Annex D (informative): Derivation of radiated spurious emissions limit for Band II LPD . 51
Annex E (informative): Justifications for field strength measurement . 52
Annex F (informative): Typical test layout . 53
F.1 Use of vehicle power leads . 53
Annex G (informative): Bibliography . 54
Annex H (informative): Change History . 55
History . 56
ETSI
7 ETSI EN 301 357 V2.1.1 (2017-06)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM).
The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.9] to
provide one voluntary means of conforming to the essential requirements of Directive 2014/53/EU on the harmonisation
of the laws of the Member States relating to the making available on the market of radio equipment and repealing
Directive 1999/5/EC [i.1].
Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with
the normative clauses of the present document given in table A.1 and table A.2 confers, within the limits of the scope of
the present document, a presumption of conformity with the corresponding essential requirements of that Directive and
associated EFTA regulations.
National transposition dates
Date of adoption of this EN: 6 June 2017
Date of latest announcement of this EN (doa): 30 September 2017
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 March 2018
Date of withdrawal of any conflicting National Standard (dow): 31 March 2019
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The present document applies to cordless audio devices in the range 25 MHz to 2 000 MHz.
The present document contains requirements to demonstrate that radio equipment both effectively uses and supports the
efficient use of radio spectrum in order to avoid harmful interference.
ETSI
8 ETSI EN 301 357 V2.1.1 (2017-06)
1 Scope
The present document specifies technical characteristics and methods of measurements for cordless audio devices in the
range 25 MHz to 2 000 MHz, including:
• cordless headphones;
• cordless loudspeakers;
• consumer radio microphones in the range 863 MHz to 865 MHz;
• in-ear monitoring equipment using either 300 kHz bandwidth analogue modulation or 300 kHz, 600 kHz,
1 200 kHz digital FDMA modulation in the range 863 MHz to 865 MHz;
• in-vehicle cordless;
• personal cordless;
• broadband multi channel audio systems;
• Band II LPD (low power devices) in the 87,5 MHz to 108 MHz range (Broadcasting Band II) using up to
200 kHz bandwidth and analogue modulation;
• and other devices and frequency bands defined within CEPT/ERC/REC 70-03 [i.2], European or National
regulation.
NOTE 1: The frequency bands for this equipment may differ from country to country as specified in their national
regulations. All equipment is intended to be used with integral antennas.
Table 1: Radiocommunications service frequency bands
Radiocommunications service frequency bands
Transmit 25 MHz to 2 000 MHz
Receive 25 MHz to 2 000 MHz
NOTE 2: Cordless audio devices covered within the present document are considered, by definition, Short Range
Devices (SRD), the power limits for different frequency bands can be found in the current version of
CEPT/ERC/REC 70-03 [i.2], annex 13 (or European or national regulations).
NOTE 3: Electromagnetic Compatibility (EMC) requirements are covered by ETSI EN 301 489-9 [i.4].
2 References
2.1 Normative references
References are specific, identified by date of publication and/or edition number or version number. Only the cited
version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] Recommendation ITU-R BS.559-2 (1990): "Objective measurement of radio-frequency protection
ratios in LF, MF and HF broadcasting".
ETSI
9 ETSI EN 301 357 V2.1.1 (2017-06)
[2] IEC 60244-13 (1991): "Methods of measurement for radio transmitters - Part 13: Performance
characteristics for FM sound broadcasting".
[3] ANSI C63.5 (2006): "American National Standard for Calibration of Antennas Used for Radiated
Emission Measurements in Electro Magnetic Interference".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
radio equipment and repealing Directive 1999/5/EC.
[i.2] CEPT/ERC/REC 70-03 relating to the use of Short Range Devices (SRD), annex 13.
[i.3] ETSI EN 300 220 (all parts): "Short Range Devices (SRD) operating in the frequency range
25 MHz to 1 000 MHz".
[i.4] ETSI EN 301 489-9: "ElectroMagnetic Compatibility (EMC) standard for radio equipment and
services; Part 9: Specific conditions for wireless microphones, similar Radio Frequency (RF)
audio link equipment, cordless audio and in-ear monitoring devices; Harmonised Standard
covering the essential requirements of article 3.1(b) of Directive 2014/53/EU".
[i.5] ETSI EN 301 908-1: "IMT cellular networks; Harmonised Standard covering the essential
requirements of article 3.2 of the Directive 2014/53/EU; Part 1: Introduction and common
requirements".
[i.6] ETSI EN 301 511: "Global System for Mobile communications (GSM); Mobile Stations (MS)
equipment; Harmonised Standard covering the essential requirements of article 3.2 of Directive
2014/53/EU".
[i.7] ETSI EN 301 489-1: "ElectroMagnetic Compatibility (EMC) standard for radio equipment and
services; Part 1: Common technical requirements; Harmonised Standard covering the essential
requirements of article 3.1(b) of Directive 2014/53/EU and the essential requirements of article 6
of Directive 2014/30/EU".
[i.8] CEPT/ECC Report 73: "Compatibility of SRD in the FM radio broadcasting band".
[i.9] Commission Implementing Decision C(2015) 5376 final of 4.8.2015 on a standardisation request
to the European Committee for Electrotechnical Standardisation and to the European
Telecommunications Standards Institute as regards radio equipment in support of Directive
2014/53/EU of the European Parliament and of the Council.
[i.10] European Commission: "The 'Blue Guide' on the implementation of EU products rules 2016
(2016/C 272/01)".
[i.11] ETSI TR 102 273 (all parts) (2001): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Improvement on Radiated Methods of Measurement (using test site) and evaluation of the
corresponding measurement uncertainties".
[i.12] ETSI TR 100 028 (all parts) (12-2001): "Electromagnetic compatibility and Radio spectrum
Matters (ERM); Uncertainties in the measurement of mobile radio equipment characteristics".
ETSI
10 ETSI EN 301 357 V2.1.1 (2017-06)
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
allocated or applicable band: frequency band as defined in radio regulations of national administrations
artificial antenna: tuned reduced-radiating dummy load equal to the nominal impedance specified by the manufacturer
Broadband multi channel audio systems: used for the transmission of high quality digital audio. These can be e.g.
surround sound systems or uncompressed audio
channel bandwidth: frequency band of defined width including safety margin for operation on adjacent channels,
located symmetrically around the carrier frequency
consumer radio microphones: intended for non professional applications
cordless: link between at least two entities that does not require physical connection
NOTE: While the term "cordless" can refer to infra-red and other non-RF "wireless" links, in the context of the
present document it is restricted to RF operating systems only.
integral antenna: antenna, with or without a connector, designed as, and declared as by the manufacturer, an
indispensable part of the equipment
integral antenna for Band II LPD only: permanent fixed antenna, which may be built-in, designed as an
indispensable part of the equipment
In-ear monitoring: equipment which is used by stage and studio performers to receive personal fold back (monitoring)
of the performance
NOTE: This can be just their own voice or a complex mi
...
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Cordless audio devices in the range 25 MHz to 2 000 MHz - Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU33.060.99Druga oprema za radijske komunikacijeOther equipment for radiocommunicationsICS:Ta slovenski standard je istoveten z:ETSI EN 301 357 V2.1.1 (2017-06)SIST EN 301 357 V2.1.1:2017en01-september-2017SIST EN 301 357 V2.1.1:2017SLOVENSKI
STANDARD
HARMONISED EUROPEAN STANDARD SIST EN 301 357 V2.1.1:2017
ETSI ETSI EN 301 357 V2.1.1 (2017-06) 2
Reference REN/ERM-TG17-19-2 Keywords audio, harmonised standard, radio, radio MIC, testing ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88
Important notice The present document can be downloaded from: http://www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the following services: https://portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2017. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. SIST EN 301 357 V2.1.1:2017
ETSI ETSI EN 301 357 V2.1.1 (2017-06) 3 Contents Intellectual Property Rights . 7 Foreword . 7 Modal verbs terminology . 7 Introduction . 7 1 Scope . 8 2 References . 8 2.1 Normative references . 8 2.2 Informative references . 9 3 Definitions, symbols and abbreviations . 10 3.1 Definitions . 10 3.2 Symbols . 11 3.3 Abbreviations . 11 4 Technical requirements specifications . 12 4.0 General . 12 4.1 Cordless audio . 12 4.1.1 In-vehicle cordless . 12 4.1.2 Personal cordless . 12 4.1.3 Broadband multi channel audio systems . 12 4.1.4 Band II LPD . 12 4.2 Consumer radio microphones . 12 4.3 In-ear monitoring . 12 4.4 Environmental profile . 12 5 Testing for compliance with technical requirements . 13 5.1 Presentation of equipment for testing purposes . 13 5.1.1 Introduction. 13 5.1.2 Choice of model for performance testing . 13 5.1.3 Definitions of alignment and switching ranges . 13 5.1.4 Alignment Range . 14 5.1.5 Choice of frequencies . 14 5.1.5.0 General . 14 5.1.5.1 Testing of single channel equipment . 14 5.1.5.2 Testing of two channel equipment . 14 5.1.5.3 Testing of multi-channel equipment (more than two channels) . 14 5.1.6 Testing of equipment with an external frequency control . 14 5.1.7 Testing of equipment with an integral antenna . 15 5.1.7.0 General . 15 5.1.7.1 Equipment with a permanent internal RF port . 15 5.1.7.2 Equipment with a temporary RF port . 15 5.2 Mechanical and electrical design . 15 5.2.1 General . 15 5.2.2 Physical Controls . 15 5.2.3 Performance testing with integral antenna . 15 6 Test conditions, power sources and ambient conditions . 15 6.1 Normal and extreme test-conditions . 15 6.2 Test power source . 16 6.3 Normal test conditions . 16 6.3.1 Normal temperature and humidity . 16 6.3.2 Normal test power source voltage . 16 6.3.2.1 Mains voltage . 16 6.3.2.2 Nickel-cadmium cells. 16 6.3.2.3 Other power sources . 16 6.4 Extreme test conditions . 17 SIST EN 301 357 V2.1.1:2017
ETSI ETSI EN 301 357 V2.1.1 (2017-06) 4 6.4.1 General . 17 6.4.2 Extreme temperatures . 17 6.4.2.0 General . 17 6.4.2.1 Procedures for tests at extreme temperatures . 17 6.4.3 Extreme test power source voltages . 17 6.4.3.1 Mains voltage . 17 6.4.3.2 Re-chargeable battery power sources . 17 6.4.3.3 Power sources using other types of batteries . 17 6.4.3.4 Other power sources . 18 7 General conditions for testing . 18 7.1 Band II LPD . 18 7.2 Normal test modulation . 18 7.3 Test fixture . 19 7.4 Test site and general arrangements for radiated measurements. 20 7.5 Modes of operation of the transmitter . 20 7.6 Arrangement for test signals at the input of the transmitter . 20 8 Methods of measurement and limits for transmitter parameters . 20 8.1 General . 20 8.2 Basic requirements for Band II LPD . 21 8.3 Methods of measurement and limits for transmitter parameters of Band II LPD . 21 8.3.1 General . 21 8.3.2 Test site and general arrangements for radiated measurements . 21 8.3.3 Test modulation . 22 8.3.4 Effective radiated power (e.r.p.) . 22 8.3.4.1 Definition . 22 8.3.4.2 Test procedure . 22 8.3.4.3 Limits . 22 8.3.4.4 Measurement uncertainty . 22 8.3.5 Occupied bandwidth . 23 8.3.5.1 Definition . 23 8.3.5.2 Test procedure . 23 8.3.5.3 Limits . 23 8.3.5.4 Measurement uncertainty . 23 8.3.6 Frequency error . 23 8.3.6.1 Definition . 23 8.3.6.2 Test procedure . 24 8.3.6.3 Limits . 24 8.3.6.4 Measurement uncertainty . 24 8.3.7 Transmitter timeout. 24 8.3.7.1 Definitions . 24 8.3.7.2 Test procedure . 24 8.3.7.3 Limits . 25 8.3.7.4 Measurement uncertainty . 25 8.3.8 Radiated spurious emissions . 25 8.3.8.1 Definition . 25 8.3.8.2 Measurement procedure . 25 8.3.8.3 Limits . 25 8.3.8.3.1 Band II LPD . 25 8.3.8.3.2 Combined equipments . 25 8.3.8.4 Measurement uncertainty . 26 8.4 Frequency error . 26 8.4.1 General . 26 8.4.2 Definition . 26 8.4.3 Method of measurement . 26 8.4.4 Limit . 26 8.5 Carrier power . 26 8.5.1 General . 26 8.5.2 Definition . 26 8.5.3 Method of measurement for equipment with integral antenna. 27 8.5.3.1 Method of measurement under normal test conditions . 27 SIST EN 301 357 V2.1.1:2017
ETSI ETSI EN 301 357 V2.1.1 (2017-06) 5 8.5.3.2 Method of measurement under extreme test conditions . 27 8.5.4 Limit . 28 8.6 Channel bandwidth . 28 8.6.1 General . 28 8.6.2 Definition . 28 8.6.3 Measurement of Necessary Bandwidth (BN) . 28 8.6.4 Limits . 29 8.7 Spurious emissions and cabinet radiation . 30 8.7.1 Definition . 30 8.7.2 Method of measuring the effective radiated power . 30 8.7.3 Limits . 31 8.7.4 Measuring receiver . 31 8.8 Cordless audio transmitter shutoff . 31 8.8.1 General . 31 8.8.2 Definition . 31 8.8.3 Method of measurement . 31 8.8.4 Limits . 31 9 Receiver . 32 9.1 General . 32 9.2 Spurious emissions and cabinet radiation . 32 9.2.1 Definition . 32 9.2.2 Method of measuring the power level in a specified load. 32 9.2.3 Method of measuring the effective radiated power of the enclosure . 32 9.2.4 Method of measuring the effective radiated power . 33 9.2.5 Limits . 33 9.3 Receiver sensitivity . 33 9.3.1 Definition . 33 9.3.2 Method of measurement . 33 9.3.3 Limits . 34 9.4 Receiver adjacent channel selectivity . 34 9.4.1 Definition . 34 9.4.2 Method of measurement . 34 9.4.3 Limits . 35 9.5 Receiver blocking . 35 9.5.1 Definition . 35 9.5.2 Method of measurement . 35 9.5.3 Limits . 36 10 Measurement uncertainty . 36 10.1 Compliance assessment when measurement uncertainty is equal to or less than maximum acceptable uncertainty . 36 10.2 Compliance assessment when measurement uncertainty is greater than maximum acceptable uncertainty . 36 10.3 Maximum allowable measurement uncertainties for cordless audio and radio microphones. 37 10.4 Maximum allowable measurement uncertainties for Band II LPD . 37 Annex A (informative): Relationship between the present document and the essential requirements of Directive 2014/53/EU . 38 Annex B (normative): Measurement of Necessary Bandwidth (B) for analogue systems . 40 B.1 Test configuration for measurement of the Necessary Bandwidth (B) for analogue systems . 40 Annex C (normative): Radiated measurement . 41 C.1 Test sites and general arrangements for measurements involving the use of radiated fields . 41 C.1.1 General . 41 C.1.2 Anechoic chamber . 41 C.1.3 Anechoic chamber with a conductive ground plane . 42 C.1.4 Open Area Test Site (OATS) . 43 C.1.5 Test antenna . 44 C.1.6 Substitution antenna . 44 C.1.7 Measuring antenna . 45 SIST EN 301 357 V2.1.1:2017
ETSI ETSI EN 301 357 V2.1.1 (2017-06) 6 C.1.8 Stripline arrangement . 45 C.1.8.1 General . 45 C.1.8.2 Description . 45 C.1.8.3 Calibration . 45 C.1.8.4 Mode of use . 45 C.2 Guidance on the use of radiation test sites . 45 C.2.1 General . 45 C.2.2 Verification of the test site . 45 C.2.3 Preparation of the DUT . 46 C.2.4 Power supplies to the DUT. 46 C.2.5 Volume control setting for analogue speech tests . 46 C.2.6 Range length . 46 C.2.7 Site preparation . 47 C.3 Coupling of signals . 47 C.3.1 General . 47 C.3.2 Data signals . 47 C.3.3 Speech and analogue signals . 48 C.3.3.0 General . 48 C.3.3.1 Acoustic coupler description. 48 C.3.3.2 Calibration . 48 C.4 Standard test position . 48 C.5 Test fixture . 49 C.5.1 General . 49 C.5.2 Description . 49 C.5.3 Calibration . 50 C.5.4 Mode of use . 50 Annex D (informative): Derivation of radiated spurious emissions limit for Band II LPD . 51 Annex E (informative): Justifications for field strength measurement . 52 Annex F (informative): Typical test layout . 53 F.1 Use of vehicle power leads . 53 Annex G (informative): Bibliography . 54 Annex H (informative): Change History . 55 History . 56
ETSI ETSI EN 301 357 V2.1.1 (2017-06) 7 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https://ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility and Radio spectrum Matters (ERM). The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.9] to provide one voluntary means of conforming to the essential requirements of Directive 2014/53/EU on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC [i.1]. Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with the normative clauses of the present document given in table A.1 and table A.2 confers, within the limits of the scope of the present document, a presumption of conformity with the corresponding essential requirements of that Directive and associated EFTA regulations.
National transposition dates Date of adoption of this EN: 6 June 2017 Date of latest announcement of this EN (doa): 30 September 2017 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 March 2018 Date of withdrawal of any conflicting National Standard (dow): 31 March 2019
Modal verbs terminology In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and "cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). "must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation. Introduction The present document applies to cordless audio devices in the range 25 MHz to 2 000 MHz. The present document contains requirements to demonstrate that radio equipment both effectively uses and supports the efficient use of radio spectrum in order to avoid harmful interference. SIST EN 301 357 V2.1.1:2017
ETSI ETSI EN 301 357 V2.1.1 (2017-06) 8 1 Scope The present document specifies technical characteristics and methods of measurements for cordless audio devices in the range 25 MHz to 2 000 MHz, including: • cordless headphones; • cordless loudspeakers; • consumer radio microphones in the range 863 MHz to 865 MHz; • in-ear monitoring equipment using either 300 kHz bandwidth analogue modulation or 300 kHz, 600 kHz, 1 200 kHz digital FDMA modulation in the range 863 MHz to 865 MHz; • in-vehicle cordless; • personal cordless; • broadband multi channel audio systems; • Band II LPD (low power devices) in the 87,5 MHz to 108 MHz range (Broadcasting Band II) using up to 200 kHz bandwidth and analogue modulation; • and other devices and frequency bands defined within CEPT/ERC/REC 70-03 [i.2], European or National regulation. NOTE 1: The frequency bands for this equipment may differ from country to country as specified in their national regulations. All equipment is intended to be used with integral antennas. Table 1: Radiocommunications service frequency bands
Radiocommunications service frequency bands Transmit 25 MHz to 2 000 MHz Receive 25 MHz to 2 000 MHz
NOTE 2: Cordless audio devices covered within the present document are considered, by definition, Short Range Devices (SRD), the power limits for different frequency bands can be found in the current version of CEPT/ERC/REC 70-03 [i.2], annex 13 (or European or national regulations). NOTE 3: Electromagnetic Compatibility (EMC) requirements are covered by ETSI EN 301 489-9 [i.4]. 2 References 2.1 Normative references References are specific, identified by date of publication and/or edition number or version number. Only the cited version applies. Referenced documents which are not found to be publicly available in the expected location might be found at https://docbox.etsi.org/Reference/. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are necessary for the application of the present document. [1] Recommendation ITU-R BS.559-2 (1990): "Objective measurement of radio-frequency protection ratios in LF, MF and HF broadcasting". SIST EN 301 357 V2.1.1:2017
ETSI ETSI EN 301 357 V2.1.1 (2017-06) 9 [2] IEC 60244-13 (1991): "Methods of measurement for radio transmitters - Part 13: Performance characteristics for FM sound broadcasting". [3] ANSI C63.5 (2006): "American National Standard for Calibration of Antennas Used for Radiated Emission Measurements in Electro Magnetic Interference". 2.2 Informative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. [i.1] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC. [i.2] CEPT/ERC/REC 70-03 relating to the use of Short Range Devices (SRD), annex 13. [i.3] ETSI EN 300 220 (all parts): "Short Range Devices (SRD) operating in the frequency range 25 MHz to 1 000 MHz". [i.4] ETSI EN 301 489-9: "ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 9: Specific conditions for wireless microphones, similar Radio Frequency (RF) audio link equipment, cordless audio and in-ear monitoring devices; Harmonised Standard covering the essential requirements of article 3.1(b) of Directive 2014/53/EU". [i.5] ETSI EN 301 908-1: "IMT cellular networks; Harmonised Standard covering the essential requirements of article 3.2 of the Directive 2014/53/EU; Part 1: Introduction and common requirements". [i.6] ETSI EN 301 511: "Global System for Mobile communications (GSM); Mobile Stations (MS) equipment; Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU". [i.7] ETSI EN 301 489-1: "ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 1: Common technical requirements; Harmonised Standard covering the essential requirements of article 3.1(b) of Directive 2014/53/EU and the essential requirements of article 6 of Directive 2014/30/EU". [i.8] CEPT/ECC Report 73: "Compatibility of SRD in the FM radio broadcasting band". [i.9] Commission Implementing Decision C(2015) 5376 final of 4.8.2015 on a standardisation request to the European Committee for Electrotechnical Standardisation and to the European Telecommunications Standards Institute as regards radio equipment in support of Directive 2014/53/EU of the European Parliament and of the Council. [i.10] European Commission: "The 'Blue Guide' on the implementation of EU products rules 2016 (2016/C 272/01)". [i.11] ETSI TR 102 273 (all parts) (2001): "Electromagnetic compatibility and Radio spectrum Matters (ERM); Improvement on Radiated Methods of Measurement (using test site) and evaluation of the corresponding measurement uncertainties". [i.12] ETSI TR 100 028 (all parts) (12-2001): "Electromagnetic compatibility and Radio spectrum Matters (ERM); Uncertainties in the measurement of mobile radio equipment characteristics". SIST EN 301 357 V2.1.1:2017
ETSI ETSI EN 301 357 V2.1.1 (2017-06) 10 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: allocated or applicable band: frequency band as defined in radio regulations of national administrations artificial antenna: tuned reduced-radiating dummy load equal to the nominal impedance specified by the manufacturer Broadband multi channel audio systems: used for the transmission of high quality digital audio. These can be e.g. surround sound systems or uncompressed audio channel bandwidth: frequency band of defined width including safety margin for operation on adjacent channels, located symmetrically around the carrier frequency consumer radio microphones: intended for non professional applications cordless: link between at least two entities that does not require physical connection NOTE: While the term "cordless" can refer to infra-red and other non-RF "wireless" links, in the context of the present document it is restricted to RF operating systems only. integral antenna: antenna, with or without a connector, designed as, and declared as by the manufacturer, an indispensable part of the equipment integral antenna for Band II LPD only: permanent fixed antenna, which may be built-in, designed as an indispensable part of the equipment In-ear monitoring: equipment which is used by stage and studio performers to receive personal fold back (monitoring) of the performance NOTE: This can be just their own voice or a complex mix of sources. This equipment is usually stereo or 2 channel audio. necessary bandwidth: for a given class of emission, width of th
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