Electromagnetic compatibility and Radio spectrum Matters (ERM) - 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

The present document, together with EN 301 489 1 [1], covers the assessment of wireless microphones, similar RF audio link equipment, cordless audio, including low power Band II transmitters and in-ear monitoring, intended for the transmission of music and speech, and associated ancillary equipment, in respect of ElectroMagnetic Compatibility (EMC). Technical specifications related to the antenna port and emissions from the enclosure port of wireless microphones, similar RF audio link equipment, cordless audio and in-ear monitoring are not included in the present document. Such technical specifications are found in the relevant product standards for the effective use of the radio spectrum. The present document specifies the applicable EMC tests, the test methods, the limits and the performance criteria for wireless microphones, similar RF audio link equipment, cordless audio, in-ear monitoring and associated ancillary equipment. This equipment can use analogue or digital modulation techniques. Examples of equipment types covered by the present document are given in annex A. Other types of transmitters or receivers, which are intended for combined use, with either wireless radio microphones, RF audio link equipment, cordless audio and in-ear monitoring shall be tested to their appropriate EMC standard. Low quality speech applications as toy microphone, babyphones etc. operating at frequencies below 50 MHz, occupied bandwidth < 25 kHz and operating according CEPT/ERC/REC 70-03 [6], annex 1 are excluded from the present document and are considered in EN 301 489-3. In case of differences (for instance concerning special conditions, definitions, abbreviations) between the present document and EN 301 489-1 [1], the provisions of the present document take precedence. The environmental classification and the emission and immunity requirements used in the present document are as stated in EN 301 489-1 [1], except for any special conditions included in the present document.

Elektromagnetna združljivost (EMC) in zadeve v zvezi z radijskim spektrom (ERM) - Standard elektromagnetne združljivosti (EMC) za radijsko opremo in storitve - 9. del: Posebni pogoji za brezžične mikrofone, podobno opremo za radiofrekvenčne (RF) zvokovne povezave, brezvrvične avdio in ušesne slušne naprave

General Information

Status
Published
Publication Date
24-Mar-2008
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
14-Mar-2008
Due Date
19-May-2008
Completion Date
25-Mar-2008
Mandate

Relations

Buy Standard

Standard
EN 301 489-9 V1.4.1:2008
English language
23 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day
Standard
ETSI EN 301 489-9 V1.4.1 (2007-11) - Electromagnetic compatibility and Radio spectrum Matters (ERM); 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
English language
23 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.LRIUHNYHQþQHHElectromagnetic compatibility and Radio spectrum Matters (ERM) - 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 devices33.160.50PriborAccessories33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general33.060.01Radijske komunikacije na splošnoRadiocommunications in generalICS:Ta slovenski standard je istoveten z:EN 301 489-9 Version 1.4.1SIST EN 301 489-9 V1.4.1:2008en01-maj-2008SIST EN 301 489-9 V1.4.1:2008SLOVENSKI
STANDARD



SIST EN 301 489-9 V1.4.1:2008



ETSI EN 301 489-9 V1.4.1 (2007-11)Harmonized European Standard (Telecommunications series) Electromagnetic compatibilityand Radio spectrum Matters (ERM);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
SIST EN 301 489-9 V1.4.1:2008



ETSI ETSI EN 301 489-9 V1.4.1 (2007-11) 2
Reference REN/ERM-EMC-250-9 Keywords audio, digital, EMC, radio, radio mic, regulation 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 Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the 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 http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2007. All rights reserved.
DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. SIST EN 301 489-9 V1.4.1:2008



ETSI ETSI EN 301 489-9 V1.4.1 (2007-11) 3
Contents Intellectual Property Rights.5 Foreword.5 1 Scope.6 2 References.6 3 Definitions and abbreviations.7 3.1 Definitions.7 3.2 Abbreviations.7 4 Test conditions.8 4.1 General.8 4.2 Arrangements for test signals.8 4.2.1 Arrangements for test signals at the input of transmitters.8 4.2.2 Arrangements for test signals at the output of transmitters.9 4.2.3 Arrangements for test signals at the input of receivers.9 4.2.4 Arrangements for test signals at the output of receivers.11 4.2.5 Arrangements for testing transmitter and receiver together (as a system).11 4.3 Exclusion bands.11 4.3.1 Receiver and receivers of transceivers exclusion band.11 4.3.2 Transmitter exclusion band.11 4.4 Narrow band responses of receivers.12 4.5 Normal test modulation.12 4.5.1 Transmitters.12 4.5.2 Receivers.12 5 Performance assessment.12 5.1 General.12 5.2 Equipment which can provide a continuous communications link.13 5.3 Equipment which does not provide a continuous communications link.13 5.4 Ancillary equipment.13 5.5 Equipment classification.13 6 Performance criteria.13 6.1 General performance criteria.14 6.2 Performance criteria for equipment which provides a continuous communication link.14 6.2.1 Performance criteria for Continuous phenomena applied to Transmitters (CT) and Receivers (CR).14 6.2.2 Performance criteria for Transient phenomena applied to Transmitters (TT) and Receivers (TR).15 6.3 Performance criteria for equipment which does not provide a continuous communication link.15 6.4 Performance criteria for ancillary equipment tested on a stand alone basis.16 7 Applicability overview.16 7.1 Emission.16 7.1.1 General.16 7.1.2 Special conditions.16 7.2 Immunity.16 7.2.1 General.16 7.2.2 Special conditions.16 Annex A (informative): Examples of wireless microphones, cordless audio, in-ear monitoring and similar RF audio link equipment within the scope of the present document.17 A.1 Wireless radio microphone equipment.17 A.2 Cordless audio equipment.17 A.3 RF audio link equipment covered within the scope of the present document.18 SIST EN 301 489-9 V1.4.1:2008



ETSI ETSI EN 301 489-9 V1.4.1 (2007-11) 4
A.4 Low Power Band II Transmitters.18 Annex B (normative): Acoustic stimulation of wireless radio microphones and similar radio communications link equipment, conditions for the test set up and configuration.19 B.1 General.19 B.2 Audio excitation.19 Annex C (informative): The EN title in the official languages.20 Annex D (informative): Bibliography.22 History.23
SIST EN 301 489-9 V1.4.1:2008



ETSI ETSI EN 301 489-9 V1.4.1 (2007-11) 5
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 (http://webapp.etsi.org/IPR/home.asp). 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 Harmonized European Standard (Telecommunications series) has been produced by ETSI Technical Committee Electromagnetic compatibility and Radio spectrum Matters (ERM). The present document has been produced by ETSI in response to a mandate from the European Commission issued under Council Directive 98/34/EC (as amended) laying down a procedure for the provision of information in the field of technical standards and regulations. The present document is intended to become a Harmonized Standard, the reference of which will be published in the Official Journal of the European Communities referencing Directive 1999/5/EC of the European Parliament and of the Council of 9 March 1999 on radio equipment and telecommunications terminal equipment and the mutual recognition of their conformity ("the R&TTE Directive"). The present document is part 9 of a multi-part deliverable. Full details of the entire series can be found in part 1 [1].
National transposition dates Date of adoption of this EN: 16 November 2007 Date of latest announcement of this EN (doa): 29 February 2008 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 August 2008 Date of withdrawal of any conflicting National Standard (dow): 31 August 2009
SIST EN 301 489-9 V1.4.1:2008



ETSI ETSI EN 301 489-9 V1.4.1 (2007-11) 6
1 Scope The present document, together with EN 301 489 1 [1], covers the assessment of wireless microphones, similar RF audio link equipment, cordless audio, including low power Band II transmitters and in-ear monitoring, intended for the transmission of music and speech, and associated ancillary equipment, in respect of ElectroMagnetic Compatibility (EMC). Technical specifications related to the antenna port and emissions from the enclosure port of wireless microphones, similar RF audio link equipment, cordless audio and in-ear monitoring are not included in the present document. Such technical specifications are found in the relevant product standards for the effective use of the radio spectrum. The present document specifies the applicable EMC tests, the test methods, the limits and the performance criteria for wireless microphones, similar RF audio link equipment, cordless audio, in-ear monitoring and associated ancillary equipment. This equipment can use analogue or digital modulation techniques. Examples of equipment types covered by the present document are given in annex A. Other types of transmitters or receivers, which are intended for combined use, with either wireless radio microphones, RF audio link equipment, cordless audio and in-ear monitoring shall be tested to their appropriate EMC standard. Low quality speech applications as toy microphone, babyphones etc. operating at frequencies below 50 MHz, occupied bandwidth < 25 kHz and operating according CEPT/ERC/REC 70-03 [6], annex 1 are excluded from the present document and are considered in EN 301 489-3. In case of differences (for instance concerning special conditions, definitions, abbreviations) between the present document and EN 301 489-1 [1], the provisions of the present document take precedence. The environmental classification and the emission and immunity requirements used in the present document are as stated in EN 301 489-1 [1], except for any special conditions included in the present document. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication and/or edition number or version number) or non-specific. • For a specific reference, subsequent revisions do not apply. • For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://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. [1] ETSI EN 301 489-1 (V1.6.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 1: Common technical requirements". [2] ETSI EN 300 422-1 (V1.2.2): "Electromagnetic compatibility and Radio spectrum Matters (ERM); Wireless microphones in the 25 MHz to 3 GHz frequency range; Part 1: Technical characteristics and test methods". [3] ETSI EN 300 454-1 (V1.1.2): "Electromagnetic compatibility and Radio spectrum Matters (ERM); Wide band audio links; Part 1: Technical characteristics and test methods". SIST EN 301 489-9 V1.4.1:2008



ETSI ETSI EN 301 489-9 V1.4.1 (2007-11) 7
[4] ETSI EN 301 357-1 (V1.3.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM); Cordless audio devices in the range 25 MHz to 2 000 MHz; Part 1: Technical characteristics and test methods". [5] ETSI EN 301 840-1 (V1.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM); Digital radio microphones operating in the CEPT Harmonized band 1 785 MHz to 1 800 MHz; Part 1: Technical characteristics and methods of measurement". [6] CEPT/ERC/REC 70-03 (05-2007): "Relating to the use of Short Range Devices (SRD)". 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in EN 301 489-1 [1], clause 3 and the following apply: companding: method of audio processing that compresses the audio dynamic range before transmission and then provides matching expansion of the signal in the receiver NOTE: The method is used to improve the audio performance in the RF link. integral antenna: antenna designed to be connected to the equipment without the use of a 50 Ω external connector and considered to be part of the equipment NOTE: An integral antenna may be fitted internally or externally to the equipment. low power band 2 transmitters: Band II LPD (low power devices) up to 200 kHz bandwidth and analogue modulation switching range: maximum frequency range over which the receiver or transmitter can be operated without reprogramming or realignment vehicle battery: battery used for the primary operation of the vehicle, i.e. the ignition or starting of the vehicle 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: CR Continuous phenomena applied to Receivers CT Continuous phenomena applied to Transmitters EMC Electromagnetic Compatibility e.r.p. effective radiated power EUT Equipment Under Test LPD Low Power Device PMR Professional Mobile Radio RF Radio Frequency SINAD Ratio of (Signal + Noise + Distortion) to (Noise + Distortion) TR Transient phenomena applied to Receivers TT Transient phenomena applied to Transmitters SIST EN 301 489-9 V1.4.1:2008



ETSI ETSI EN 301 489-9 V1.4.1 (2007-11) 8
4 Test conditions For the purposes of the present document, the test conditions of EN 301 489-1 [1], clause 4 shall apply as appropriate. Further product related test conditions for wireless microphones, similar RF audio link equipment, cordless audio, in-ear monitoring equipment and ancillary equipment are specified in the present document. 4.1 General For emission and immunity tests the test modulation, test arrangements, etc., as specified in the present document, clauses 4.1 to 4.5 shall apply. For the purpose of EMC tests, body worn or hand held transmitters shall be mounted on a non-conductive stand at least 0,8 m from any conducting surface. The EUT and any other equipment required for the performance assessment before, during, and after the conclusion of the tests, shall be connected in a manner typical of normal intended use. Whenever the EUT is provided with a detachable antenna, it shall be tested with the antenna fitted in a manner typical of normal intended use. For immunity tests, if the equipment is of a category which permits it, a communications link shall be established at the start of the test and maintained during the test.
The test conditions shall be as follows: - the transmitter shall be operated at its normal maximum RF output power modulated with a suitable modulation signal (see clause 4.5.1); - for stand alone receivers or receivers of transceivers operating in simplex mode, the wanted RF input signal, coupled to the receiver, shall be modulated with a suitable modulation signal (see clause 4.5.2); - for duplex transceivers, the wanted RF input signal, coupled to the receiver, shall be modulated with a suitable modulation signal (see clause 4.5.2). The transmitter shall be operated at its normal maximum output power, modulated with the test modulation signal, coupled to the transmitter from the output of the receiver (repeater mode); - digitally modulated systems shall use a defined interface to convert between analogue and digital domain (and vice versa). 4.2 Arrangements for test signals The provisions of EN 301 489-1 [1], clause 4.2 shall apply. 4.2.1 Arrangements for test signals at the input of transmitters The provisions of EN 301 489-1 [1], clause 4.2.1 shall apply with the following modifications. For transmitters designed to operate from an integral or dedicated microphone (see figure 2) it shall be permissible to use an acoustic coupling device to inject the normal test modulation signal (see figure 3). The acoustic coupling device may be provided by the manufacturer. For equipment which can use a variety of audio capsules, the manufacturer shall declare the type of capsule, e.g. dynamic, electret, or condenser, to be provided with the system. Only one type of capsule shall be tested. All other capsules shall be deemed as compliant. The transmitter shall be tested at its most sensitive input with the test capsule. For equipment not designed to use an integral or dedicated microphone, the test signal shall be fed in electrical form to the most sensitive input socket (see figure 1) using maximum length cables as normally supplied by the manufacturer with the equipment. The modulation signal used for the tests shall be a 1 kHz sine wave tone at a level declared by the manufacturer to obtain 100 % audio modulation. SIST EN 301 489-9 V1.4.1:2008



ETSI ETSI EN 301 489-9 V1.4.1 (2007-11) 9
The manufacturer may provide a suitable companion receiver that can be used to set up a communications link. In this case a suitable attenuator in the companion receiver input may be necessary, see annex B for further details. In the case of systems with a digital audio input and outputs this test signal has to be presented via a suitable test fixture converting the analogue signal to the digital domain and vice-versa. The applicant shall provide details on the interface and test fixture used for the test. 4.2.2 Arrangements for test signals at the output of transmitters The provisions of EN 301 489-1 [1], clause 4.2.2 shall apply. 4.2.3 Arrangements for test signals at the input of receivers The provisions of EN 301 489-1 [1], clause 4.2.3 shall apply with the following modifications. The wanted RF input signal to the receiver should be modulated with a suitable signal corresponding to 100 % audio modulation (maximum channel loading). If it is not appropriate to provide a modulated RF signal to the receiver, the test may be performed using an unmodulated wanted RF input signal. The level and make up of the wanted RF input signal shall be declared by the manufacturer. The level chosen shall be set to a value 60 dB above the threshold sensitivity of the receiver. Other systems than analogue radio microphones can define another level more in line with the application. The level used shall be recorded in the test report. The manufacturer may provide a suitable companion transmitter that can be used to set up a communications link. In this case a suitable attenuator in the EUT input may be necessary. RF input Audio output Receiver Audio test equipment Absorber lined test chamber Audio
input Output Interfering signal Wanted signal EUT
Generator
Figure 1: Test configuration for integral antenna; transmitter operation - electrical input SIST EN 301 489-9 V1.4.1:2008



ETSI ETSI EN 301 489-9 V1.4.1 (2007-11) 10 RF input Audio output Receiver Audio test equipment Absorber lined test chamber Audio
input Output Interfering signal Wanted signal EUT Transducer Acoustic tube (see figure 3) Generator
Figure 2: Test configuration for integral antenna; transmitter operation - acoustic input Acoustic tubeSuggested minimum length 1 mFunnels (optional)E.U.T.TransducerPoweramplifier(optional)Audiosignalgenerator Figure 3: Example of acoustic coupling jig RF output Audio input Audio test equipment Absorber lined test chamber Audio Input output Interfering signal Wanted signal EUT RF generator
Generator
NOTE: The RF generator may be a companion transmitter sited inside the test chamber if necessary.
Figure 4: Test configuration for integral antenna; receiver operation SIST EN 301 489-9 V1.4.1:2008



ETSI ETSI EN 301 489-9 V1.4.1 (2007-11) 11 4.2.4 Arrangements for test signals at the output of receivers The provisions of EN 301 489-1 [1], clause 4.2.4 shall apply with the following modification. The audio frequency output of the equipment shall be suitably coupled to the SINAD measuring system outside of the test environment. The characteristics of the SINAD measuring system shall be such that the upper -3 dB frequency of its detector part is to exceed 16 kHz, and its electrical measurement flatness error between 40 Hz and 16 kHz is not to exceed ±2 dB. The coupling means actually used shall be recorded in the test report. In the case of systems with a digital audio output a suitable test fixture to convert from digital to analogue signals shall be defined by the applicant. The applicant shall provide details on the interface and test fixture used for the test. The interface shall be capable to meet the above specifications. 4.2.5 Arrangements for testing transmitter and receiver together (as a system) The provisions of EN 301 489-1 [1], clause 4.2.5 shall apply. In case of digitally modulated systems, the applicant shall define suitable test fixtures for converting from the analogue to the digital domain and vice versa. This definition shall be included in the test report. 4.3 Exclusion bands The provisions of EN 301 489-1 [1], clause 4.3 shall apply. 4.3.1 Receiver and receivers of transceivers exclusion band The exclusion band for receivers and receivers of transceivers is the frequency range determined by the switching range, as declared by the manufacturer, extended as follows: 1) Category 1 and 2 equipment (as defined in clause 6): - the lower frequency of the exclusion band is the lower frequency of the switching range, minus 5 % of the centre frequency of the switching range; - the upper frequency of the exclusion band is the upper frequency of the switching range, plus 5 % of the centre frequency of the switching range. 2) Category 3 equipment (as defined in clause 6): - the lower frequency of the exclusion band is the lower frequency of the switching range, minus 5 % of the centre frequency of the switching range, or minus 10 MHz, whichever will result in the lowest frequency; - the upper frequency of the exclusion band is the upper frequency of the switching range, plus 5 % of the centre frequency of the switching range, or plus 10 MHz, whichever will result in the highest frequency. The manufacturer shall state the category of equipment on the documentation accompanying the product, and shall declare the category to the test house in the form of a manufacturer's declaration. 4.3.2 Transmitter exclusion band The lower frequency of the exclusion band is the lower frequency of the switching range, minus 5 % of the centre frequency of the switching range. The upper frequency of the exclusion band is the upper frequency of the switching range, plus 5 % of the centre frequency of the switching range. SIST EN 301 489-9 V1.4.1:2008



ETSI ETSI EN 301 489-9 V1.4.1 (2007-11) 12 4.4 Narrow band responses of receivers The provision of EN 301 489-1 [1], clause 4.4 shall apply. The identification criterion for narrow band responses of the EUT is a reduction of the observed SINAD level of the audio output below the relevant category limit set out in table 2, see clause 6.2. The nominal frequency offset used for the identification of narrowband responses shall be twice the bandwidth of the receiver IF filter immediately preceding the demodulator, as declared by the manufacturer, for the first part of the identification procedure, and two and one half times the bandwidth of the receiver for its second part. For digital systems the narrowband response shall be limited to less than 3 times the declared bandwidth (B) of the system. See EN 300 422-1 [2], EN 300 454-1 [3], EN 301 357-1 [4] and EN 301 840-1 [5]. 4.5 Normal test modulation 4.5.1 Transmitters The transmitter shall be modulated with a sinusoidal audio frequency signal of 1 000 Hz, provided either by a suitable acoustic coupling means or by a shielded transmission line (e.g. a coaxial cable). The level of this audio signal shall be adjusted corresponding to 100 % audio modulation (maximum channel loading) of the wanted RF carrier. For digitally modulated systems the applicant shall specify the modulation method and its parameters and provide a suitable test fixture to allow for testing similar to 100 % audio modulation level. 4.5.2 Receivers The receivers wanted RF input signal shall be set to the operation frequency of the receiver within the designated operation frequency band and modulated with a sinusoidal audio frequency of 1 000 Hz, provided
...

ETSI EN 301 489-9 V1.4.1 (2007-11)
Harmonized European Standard (Telecommunications series)

Electromagnetic compatibility
and Radio spectrum Matters (ERM);
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

---------------------- Page: 1 ----------------------
2 ETSI EN 301 489-9 V1.4.1 (2007-11)



Reference
REN/ERM-EMC-250-9
Keywords
audio, digital, EMC, radio, radio mic, regulation
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
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the 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
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2007.
All rights reserved.

TM TM TM
DECT , PLUGTESTS and UMTS are Trade Marks of ETSI registered for the benefit of its Members.
TM
TIPHON and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI

---------------------- Page: 2 ----------------------
3 ETSI EN 301 489-9 V1.4.1 (2007-11)
Contents
Intellectual Property Rights.5
Foreword.5
1 Scope.6
2 References.6
3 Definitions and abbreviations.7
3.1 Definitions.7
3.2 Abbreviations.7
4 Test conditions .8
4.1 General.8
4.2 Arrangements for test signals .8
4.2.1 Arrangements for test signals at the input of transmitters.8
4.2.2 Arrangements for test signals at the output of transmitters.9
4.2.3 Arrangements for test signals at the input of receivers .9
4.2.4 Arrangements for test signals at the output of receivers .11
4.2.5 Arrangements for testing transmitter and receiver together (as a system) .11
4.3 Exclusion bands.11
4.3.1 Receiver and receivers of transceivers exclusion band.11
4.3.2 Transmitter exclusion band.11
4.4 Narrow band responses of receivers.12
4.5 Normal test modulation.12
4.5.1 Transmitters.12
4.5.2 Receivers.12
5 Performance assessment.12
5.1 General.12
5.2 Equipment which can provide a continuous communications link .13
5.3 Equipment which does not provide a continuous communications link.13
5.4 Ancillary equipment.13
5.5 Equipment classification.13
6 Performance criteria .13
6.1 General performance criteria.14
6.2 Performance criteria for equipment which provides a continuous communication link .14
6.2.1 Performance criteria for Continuous phenomena applied to Transmitters (CT) and Receivers (CR).14
6.2.2 Performance criteria for Transient phenomena applied to Transmitters (TT) and Receivers (TR) .15
6.3 Performance criteria for equipment which does not provide a continuous communication link.15
6.4 Performance criteria for ancillary equipment tested on a stand alone basis .16
7 Applicability overview.16
7.1 Emission.16
7.1.1 General.16
7.1.2 Special conditions.16
7.2 Immunity.16
7.2.1 General.16
7.2.2 Special conditions.16
Annex A (informative): Examples of wireless microphones, cordless audio, in-ear monitoring
and similar RF audio link equipment within the scope of the present
document .17
A.1 Wireless radio microphone equipment.17
A.2 Cordless audio equipment.17
A.3 RF audio link equipment covered within the scope of the present document.18
ETSI

---------------------- Page: 3 ----------------------
4 ETSI EN 301 489-9 V1.4.1 (2007-11)
A.4 Low Power Band II Transmitters .18
Annex B (normative): Acoustic stimulation of wireless radio microphones and similar radio
communications link equipment, conditions for the test set up and
configuration .19
B.1 General.19
B.2 Audio excitation .19
Annex C (informative): The EN title in the official languages .20
Annex D (informative): Bibliography.22
History .23

ETSI

---------------------- Page: 4 ----------------------
5 ETSI EN 301 489-9 V1.4.1 (2007-11)
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 (http://webapp.etsi.org/IPR/home.asp).
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 Harmonized European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM).
The present document has been produced by ETSI in response to a mandate from the European Commission issued
under Council Directive 98/34/EC (as amended) laying down a procedure for the provision of information in the field of
technical standards and regulations.
The present document is intended to become a Harmonized Standard, the reference of which will be published in the
Official Journal of the European Communities referencing Directive 1999/5/EC of the European Parliament and of the
Council of 9 March 1999 on radio equipment and telecommunications terminal equipment and the mutual recognition
of their conformity ("the R&TTE Directive").
The present document is part 9 of a multi-part deliverable. Full details of the entire series can be found in part 1 [1].

National transposition dates
Date of adoption of this EN: 16 November 2007
Date of latest announcement of this EN (doa): 29 February 2008
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 August 2008
Date of withdrawal of any conflicting National Standard (dow): 31 August 2009

ETSI

---------------------- Page: 5 ----------------------
6 ETSI EN 301 489-9 V1.4.1 (2007-11)
1 Scope
The present document, together with EN 301 489 1 [1], covers the assessment of wireless microphones, similar RF
audio link equipment, cordless audio, including low power Band II transmitters and in-ear monitoring, intended for the
transmission of music and speech, and associated ancillary equipment, in respect of ElectroMagnetic Compatibility
(EMC).
Technical specifications related to the antenna port and emissions from the enclosure port of wireless microphones,
similar RF audio link equipment, cordless audio and in-ear monitoring are not included in the present document. Such
technical specifications are found in the relevant product standards for the effective use of the radio spectrum.
The present document specifies the applicable EMC tests, the test methods, the limits and the performance criteria for
wireless microphones, similar RF audio link equipment, cordless audio, in-ear monitoring and associated ancillary
equipment. This equipment can use analogue or digital modulation techniques.
Examples of equipment types covered by the present document are given in annex A.
Other types of transmitters or receivers, which are intended for combined use, with either wireless radio microphones,
RF audio link equipment, cordless audio and in-ear monitoring shall be tested to their appropriate EMC standard.
Low quality speech applications as toy microphone, babyphones etc. operating at frequencies below 50 MHz, occupied
bandwidth < 25 kHz and operating according CEPT/ERC/REC 70-03 [6], annex 1 are excluded from the present
document and are considered in EN 301 489-3.
In case of differences (for instance concerning special conditions, definitions, abbreviations) between the present
document and EN 301 489-1 [1], the provisions of the present document take precedence.
The environmental classification and the emission and immunity requirements used in the present document are as
stated in EN 301 489-1 [1], except for any special conditions included in the present document.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://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.
[1] ETSI EN 301 489-1 (V1.6.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 1:
Common technical requirements".
[2] ETSI EN 300 422-1 (V1.2.2): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Wireless microphones in the 25 MHz to 3 GHz frequency range; Part 1: Technical characteristics
and test methods".
[3] ETSI EN 300 454-1 (V1.1.2): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Wide band audio links; Part 1: Technical characteristics and test methods".
ETSI

---------------------- Page: 6 ----------------------
7 ETSI EN 301 489-9 V1.4.1 (2007-11)
[4] ETSI EN 301 357-1 (V1.3.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Cordless audio devices in the range 25 MHz to 2 000 MHz; Part 1: Technical characteristics and
test methods".
[5] ETSI EN 301 840-1 (V1.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Digital radio microphones operating in the CEPT Harmonized band 1 785 MHz to 1 800 MHz;
Part 1: Technical characteristics and methods of measurement".
[6] CEPT/ERC/REC 70-03 (05-2007): "Relating to the use of Short Range Devices (SRD)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in EN 301 489-1 [1], clause 3 and the
following apply:
companding: method of audio processing that compresses the audio dynamic range before transmission and then
provides matching expansion of the signal in the receiver
NOTE: The method is used to improve the audio performance in the RF link.
integral antenna: antenna designed to be connected to the equipment without the use of a 50 Ω external connector and
considered to be part of the equipment
NOTE: An integral antenna may be fitted internally or externally to the equipment.
low power band 2 transmitters: Band II LPD (low power devices) up to 200 kHz bandwidth and analogue modulation
switching range: maximum frequency range over which the receiver or transmitter can be operated without
reprogramming or realignment
vehicle battery: battery used for the primary operation of the vehicle, i.e. the ignition or starting of the vehicle
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
CR Continuous phenomena applied to Receivers
CT Continuous phenomena applied to Transmitters
EMC Electromagnetic Compatibility
e.r.p. effective radiated power
EUT Equipment Under Test
LPD Low Power Device
PMR Professional Mobile Radio
RF Radio Frequency
SINAD Ratio of (Signal + Noise + Distortion) to (Noise + Distortion)
TR Transient phenomena applied to Receivers
TT Transient phenomena applied to Transmitters
ETSI

---------------------- Page: 7 ----------------------
8 ETSI EN 301 489-9 V1.4.1 (2007-11)
4 Test conditions
For the purposes of the present document, the test conditions of EN 301 489-1 [1], clause 4 shall apply as appropriate.
Further product related test conditions for wireless microphones, similar RF audio link equipment, cordless audio,
in-ear monitoring equipment and ancillary equipment are specified in the present document.
4.1 General
For emission and immunity tests the test modulation, test arrangements, etc., as specified in the present document,
clauses 4.1 to 4.5 shall apply.
For the purpose of EMC tests, body worn or hand held transmitters shall be mounted on a non-conductive stand at least
0,8 m from any conducting surface. The EUT and any other equipment required for the performance assessment before,
during, and after the conclusion of the tests, shall be connected in a manner typical of normal intended use.
Whenever the EUT is provided with a detachable antenna, it shall be tested with the antenna fitted in a manner typical
of normal intended use.
For immunity tests, if the equipment is of a category which permits it, a communications link shall be established at the
start of the test and maintained during the test.
The test conditions shall be as follows:
- the transmitter shall be operated at its normal maximum RF output power modulated with a suitable
modulation signal (see clause 4.5.1);
- for stand alone receivers or receivers of transceivers operating in simplex mode, the wanted RF input signal,
coupled to the receiver, shall be modulated with a suitable modulation signal (see clause 4.5.2);
- for duplex transceivers, the wanted RF input signal, coupled to the receiver, shall be modulated with a suitable
modulation signal (see clause 4.5.2). The transmitter shall be operated at its normal maximum output power,
modulated with the test modulation signal, coupled to the transmitter from the output of the receiver (repeater
mode);
- digitally modulated systems shall use a defined interface to convert between analogue and digital domain (and
vice versa).
4.2 Arrangements for test signals
The provisions of EN 301 489-1 [1], clause 4.2 shall apply.
4.2.1 Arrangements for test signals at the input of transmitters
The provisions of EN 301 489-1 [1], clause 4.2.1 shall apply with the following modifications.
For transmitters designed to operate from an integral or dedicated microphone (see figure 2) it shall be permissible to
use an acoustic coupling device to inject the normal test modulation signal (see figure 3). The acoustic coupling device
may be provided by the manufacturer.
For equipment which can use a variety of audio capsules, the manufacturer shall declare the type of capsule,
e.g. dynamic, electret, or condenser, to be provided with the system. Only one type of capsule shall be tested. All other
capsules shall be deemed as compliant. The transmitter shall be tested at its most sensitive input with the test capsule.
For equipment not designed to use an integral or dedicated microphone, the test signal shall be fed in electrical form to
the most sensitive input socket (see figure 1) using maximum length cables as normally supplied by the manufacturer
with the equipment.
The modulation signal used for the tests shall be a 1 kHz sine wave tone at a level declared by the manufacturer to
obtain 100 % audio modulation.
ETSI

---------------------- Page: 8 ----------------------
9 ETSI EN 301 489-9 V1.4.1 (2007-11)
The manufacturer may provide a suitable companion receiver that can be used to set up a communications link. In this
case a suitable attenuator in the companion receiver input may be necessary, see annex B for further details.
In the case of systems with a digital audio input and outputs this test signal has to be presented via a suitable test fixture
converting the analogue signal to the digital domain and vice-versa. The applicant shall provide details on the interface
and test fixture used for the test.
4.2.2 Arrangements for test signals at the output of transmitters
The provisions of EN 301 489-1 [1], clause 4.2.2 shall apply.
4.2.3 Arrangements for test signals at the input of receivers
The provisions of EN 301 489-1 [1], clause 4.2.3 shall apply with the following modifications.
The wanted RF input signal to the receiver should be modulated with a suitable signal corresponding to 100 % audio
modulation (maximum channel loading). If it is not appropriate to provide a modulated RF signal to the receiver, the
test may be performed using an unmodulated wanted RF input signal.
The level and make up of the wanted RF input signal shall be declared by the manufacturer. The level chosen shall be
set to a value 60 dB above the threshold sensitivity of the receiver. Other systems than analogue radio microphones can
define another level more in line with the application. The level used shall be recorded in the test report.
The manufacturer may provide a suitable companion transmitter that can be used to set up a communications link. In
this case a suitable attenuator in the EUT input may be necessary.
Absorber lined test chamber
RF input Audio
Wanted
output
signal
Receiver
Interfering
signal
Audio test
equipment
EUT
Audio
Output
input
Generator

Figure 1: Test configuration for integral antenna; transmitter operation - electrical input
ETSI

---------------------- Page: 9 ----------------------
10 ETSI EN 301 489-9 V1.4.1 (2007-11)
Absorber lined test chamber
RF input Audio
Wanted
output
signal
Receiver
Interfering signal
Transducer
Audio test
EUT
Acoustic tube
equipment
Audio
(see figure 3)
Output
input
Generator

Figure 2: Test configuration for integral antenna; transmitter operation - acoustic input
Funnels (optional) Transducer
E.U.T.
Audio
signal
generator
Acoustic tube
Power
amplifier
Suggested minimum length 1 m
(optional)

Figure 3: Example of acoustic coupling jig
Absorber lined test chamber
RF output Audio
Wanted
input
signal
RF generator
Interfering
signal
Audio test
EUT equipment
Audio
Input
output
Generator

NOTE: The RF generator may be a companion transmitter sited inside the test chamber if necessary.

Figure 4: Test configuration for integral antenna; receiver operation
ETSI

---------------------- Page: 10 ----------------------
11 ETSI EN 301 489-9 V1.4.1 (2007-11)
4.2.4 Arrangements for test signals at the output of receivers
The provisions of EN 301 489-1 [1], clause 4.2.4 shall apply with the following modification.
The audio frequency output of the equipment shall be suitably coupled to the SINAD measuring system outside of the
test environment. The characteristics of the SINAD measuring system shall be such that the upper -3 dB frequency of
its detector part is to exceed 16 kHz, and its electrical measurement flatness error between 40 Hz and 16 kHz is not to
exceed ±2 dB. The coupling means actually used shall be recorded in the test report.
In the case of systems with a digital audio output a suitable test fixture to convert from digital to analogue signals shall
be defined by the applicant. The applicant shall provide details on the interface and test fixture used for the test. The
interface shall be capable to meet the above specifications.
4.2.5 Arrangements for testing transmitter and receiver together
(as a system)
The provisions of EN 301 489-1 [1], clause 4.2.5 shall apply.
In case of digitally modulated systems, the applicant shall define suitable test fixtures for converting from the analogue
to the digital domain and vice versa. This definition shall be included in the test report.
4.3 Exclusion bands
The provisions of EN 301 489-1 [1], clause 4.3 shall apply.
4.3.1 Receiver and receivers of transceivers exclusion band
The exclusion band for receivers and receivers of transceivers is the frequency range determined by the switching
range, as declared by the manufacturer, extended as follows:
1) Category 1 and 2 equipment (as defined in clause 6):
- the lower frequency of the exclusion band is the lower frequency of the switching range, minus 5 % of
the centre frequency of the switching range;
- the upper frequency of the exclusion band is the upper frequency of the switching range, plus 5 % of the
centre frequency of the switching range.
2) Category 3 equipment (as defined in clause 6):
- the lower frequency of the exclusion band is the lower frequency of the switching range, minus 5 % of
the centre frequency of the switching range, or minus 10 MHz, whichever will result in the lowest
frequency;
- the upper frequency of the exclusion band is the upper frequency of the switching range, plus 5 % of the
centre frequency of the switching range, or plus 10 MHz, whichever will result in the highest frequency.
The manufacturer shall state the category of equipment on the documentation accompanying the product, and shall
declare the category to the test house in the form of a manufacturer's declaration.
4.3.2 Transmitter exclusion band
The lower frequency of the exclusion band is the lower frequency of the switching range, minus 5 % of the centre
frequency of the switching range.
The upper frequency of the exclusion band is the upper frequency of the switching range, plus 5 % of the centre
frequency of the switching range.
ETSI

---------------------- Page: 11 ----------------------
12 ETSI EN 301 489-9 V1.4.1 (2007-11)
4.4 Narrow band responses of receivers
The provision of EN 301 489-1 [1], clause 4.4 shall apply.
The identification criterion for narrow band responses of the EUT is a reduction of the observed SINAD level of the
audio output below the relevant category limit set out in table 2, see clause 6.2.
The nominal frequency offset used for the identification of narrowband responses shall be twice the bandwidth of the
receiver IF filter immediately preceding the demodulator, as declared by the manufacturer, for the first part of the
identification procedure, and two and one half times the bandwidth of the receiver for its second part.
For digital systems the narrowband response shall be limited to less than 3 times the declared bandwidth (B) of the
system. See EN 300 422-1 [2], EN 300 454-1 [3], EN 301 357-1 [4] and EN 301 840-1 [5].
4.5 Normal test modulation
4.5.1 Transmitters
The transmitter shall be modulated with a sinusoidal audio frequency signal of 1 000 Hz, provided either by a suitable
acoustic coupling means or by a shielded transmission line (e.g. a coaxial cable). The level of this audio signal shall be
adjusted corresponding to 100 % audio modulation (maximum channel loading) of the wanted RF carrier.
For digitally modulated systems the applicant shall specify the modulation method and its parameters and provide a
suitable test fixture to allow for testing similar to 100 % audio modulation level.
4.5.2 Receivers
The receivers wanted RF input signal shall be set to the operation frequency of the receiver within the designated
operation frequency band and modulated with a sinusoidal audio frequency of 1 000 Hz, provided either by a test
antenna located within the test environment (integral
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.