ETSI EN 300 422 V1.2.1 (1999-07)

ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Technical characteristics and test methods for wireless microphones in the 25 MHz to 3 GHz frequency range

REN/ERM-RP08-0306

Elektromagnetna združljivost in zadeve v zvezi z radijskim spektrom (ERM) – Tehnične karakteristike in preskusne metode za brezžične mikrofone v frekvenčnem območju od 25 MHz do 3 GHz

General Information

• Status: Published
• Publication Date: 15-Jul-1999
• Technical Committee: ERM RP08 - Land Mobile Radio C
• Current Stage: 12 - Completion
• Due Date: 02-Jul-1999
• Completion Date: 16-Jul-1999
• Ref Project: SIST EN 300 422 V1.2.1:2003 - ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Technical characteristics and test methods for wireless microphones in the 25 MHz to 3 GHz frequency range

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Technical characteristics and test methods for wireless microphones in the 25 MHz to 3 GHz frequency range33.160.50PriborAccessories33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general33.060.99Druga oprema za radijske komunikacijeOther equipment for radiocommunicationsICS:Ta slovenski standard je istoveten z:EN 300 422 Version 1.2.1SIST EN 300 422 V1.2.1:2003en01-december-2003SIST EN 300 422 V1.2.1:2003SLOVENSKI
STANDARD



SIST EN 300 422 V1.2.1:2003



ETSI EN 300 422 V1.2.1 (1999-07)European Standard (Telecommunications series)Electromagnetic compatibilityand Radio spectrum Matters (ERM);Technical characteristics and test methods for wirelessmicrophones in the 25 MHz to 3 GHz frequency rangeSIST EN 300 422 V1.2.1:2003



ETSIETSI EN 300 422 V1.2.1 (1999-07)2ReferenceREN/ERM-RP08-0306 (3wo00ioo.PDF)Keywordsradio, radio mic, testingETSIPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: [phone]
Fax: [phone]Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/[e-mail] copies of this ETSI deliverablecan be downloaded fromhttp://www.etsi.orgIf you find errors in the present document, send yourcomment to: [e-mail] NotificationNo 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 1999.All rights reserved.SIST EN 300 422 V1.2.1:2003



ETSIETSI EN 300 422 V1.2.1 (1999-07)3ContentsIntellectual Property Rights.6Foreword.6Introduction.61Scope.82References.93Definitions, symbols and abbreviations.93.1Definitions.93.2Symbols.103.3Abbreviations.104Functional characteristics.114.1Radio microphone descriptions.114.2In ear monitoring.115General.115.1Presentation of equipment for testing purposes.115.1.1Choice of model for type testing.125.1.2Definitions of alignment and switching ranges.125.1.3Definition of the categories of the Alignment Range (AR1 and AR2).125.1.4Choice of frequencies.135.1.5Testing of single channel equipment of category AR1.135.1.6Testing of single channel equipment of category AR2.135.1.7Testing of two channel equipment of category AR1.135.1.8Testing of two channel equipment of category AR2.135.1.9Testing of multi-channel equipment (more than two channels) of category AR1.135.1.10Testing of multi-channel equipment (more than two channels) of category AR2 (switching range lessthan alignment range).145.1.11Testing of multi-channel equipment (more than two channels) of category AR2 (switching rangeequals the alignment range).145.1.12Testing of equipment without a permanent external RF port.145.1.12.1Equipment with a permanent internal RF port.145.1.12.2Equipment with a temporary RF port.145.2Mechanical and electrical design.145.2.1General.145.2.2Limiting threshold.155.2.3Controls.155.2.4Type approval with Integral antenna.155.2.5Marking (equipment identification).155.2.5.1Regulatory marking.165.3Interpretation of the measurement results.166Test conditions, power sources and ambient conditions.166.1Normal and extreme test-conditions.166.2Test power source.166.3Normal test conditions.176.3.1Normal temperature and humidity.176.3.2Normal test power source voltage.176.3.2.1Mains voltage.176.3.2.2Nickel-cadmium cells.176.3.2.3Other power sources.176.4Extreme test conditions.176.4.1Extreme temperatures.176.4.1.1Procedures for tests at extreme temperatures.176.4.2Extreme test power source voltages.18SIST EN 300 422 V1.2.1:2003



ETSIETSI EN 300 422 V1.2.1 (1999-07)46.4.2.1Mains voltage.186.4.2.2Re-chargeable battery power sources.186.4.2.3Power sources using other types of batteries.186.4.2.4Other power sources.187General conditions.197.1Normal test modulation.197.2Artificial antenna.207.3Test fixture.207.4Test site and general arrangements for radiated measurements.207.5Modes of operation of the transmitter.217.6Arrangement for test signals at the input of the transmitter.218Methods of measurement and limits for transmitter parameters.218.1Frequency error.218.1.1Definition.218.1.2Method of measurement.218.1.3Limit.218.2Carrier power.228.2.1Definition.228.2.2Method of measurement for equipment without integral antenna.228.2.3Method of measurement for equipment with integral antenna.228.2.3.1Method of measurement under normal test conditions.228.2.3.2Method of measurement under extreme test conditions.228.2.4Limit.238.3Channel bandwidth.238.3.1Definition.238.3.2Measurement of Necessary Bandwidth (BN).238.3.3Limits.248.4Spurious emissions.258.4.1Definitions.258.4.2Method of measuring the effective radiated power.258.4.3Limits.258.4.4Measuring receiver.259Receiver.269.1Spurious emissions.269.1.1Definitions.269.1.2Method of measuring the power level in a specified load.269.1.3Method of measuring the effective radiated power of the enclosure.269.1.4Method of measuring the effective radiated power.279.1.5Limits.2710Measurement uncertainty.27Annex A (normative):Radiated measurement.28A.1Test sites and general arrangements for measurements involving the use of radiated fields.28A.1.1Outdoor test site.28A.1.1.1Test support for body worn equipment.28A.1.1.2Standard position.29A.1.2Test antenna.29A.1.3Substitution antenna.29A.1.4Optional additional indoor site.30A.2Guidance on the use of radiation test sites.31A.2.1Measuring distance.31A.2.2Test antenna.31A.2.3Substitution antenna.31A.2.4Artificial antenna.31A.2.5Auxiliary cables.31SIST EN 300 422 V1.2.1:2003



ETSIETSI EN 300 422 V1.2.1 (1999-07)5A.3Further optional alternative indoor test site using an anechoic chamber.32A.3.1Example of the construction of a shielded anechoic chamber.32A.3.2Influence of parasitic reflections in anechoic chambers.32A.3.3Calibration of the shielded anechoic chamber.33Annex B (normative):Measurement of Necessary Bandwidth (BN).35Annex C (informative):Graphic representation of the selection of equipment andfrequencies for testing of single and multi-frequency equipment.36History.38SIST EN 300 422 V1.2.1:2003



ETSIETSI EN 300 422 V1.2.1 (1999-07)6Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respectof ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on theETSI Web server (http://www.etsi.org/ipr).Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guaranteecan be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)which are, or may be, or may become, essential to the present document.ForewordThis European Standard (Telecommunications series) has been produced by ETSI Technical CommitteeElectromagnetic compatibility and Radio spectrum Matters (ERM).Every EN prepared by ETSI is a voluntary standard. The present document may contain text concerning conformancetesting of the equipment to which it relates. This text should be considered as guidance only and does not make thepresent document mandatory.Annex A provides normative specifications concerning radiated measurements.Annex B describes the test set-up for the measurement of Necessary Bandwidth (BN).Annex C provides a graphic representation of the equipment and frequencies for the testing of single andmulti-frequency equipment.National transposition datesDate of adoption of this EN:18 June 1999Date of latest announcement of this EN (doa):30 September 1999Date of latest publication of new National Standardor endorsement of this EN (dop/e):31 March 2000Date of withdrawal of any conflicting National Standard (dow):31 March 2000IntroductionThe present document is based on the CEPT Recommendation T/R 20-06 [1].This CEPT Recommendation has been a frame that led to many national prescriptions that differed, sometimessubstantially, between European countries. The rapidly increasing quantities of wireless microphones (hereafter referredto as radio microphones) in operation, both legal and illegal, together with the greater mobility of the users, eitherprofessional or private, has led to a serious situation with many occurrences of interference and irregular operation.Legal radio microphones, being fundamentally low power devices, are interfered with more than the generators of theinterference, and suffer primarily from this situation.In preparing the present document, much attention has been given to assure a low interference probability, while at thesame time allowing a maximum flexibility and service to the end-user.SIST EN 300 422 V1.2.1:2003



ETSIETSI EN 300 422 V1.2.1 (1999-07)7The present document provides the necessary parameters for equipment to obtain common approval throughout Europe.It also is intended to make it easier for the frequency management authorities to find harmonized frequency allocations.Common technical specifications and harmonized frequency allocations are expected to reduce greatly the presentproblems of interference and illegal use.The present document is a type testing standard based on spectrum utilization parameters and does not includeperformance characteristics that may be required by the user or requirements for interfacing equipment.The present document is intended to specify the minimum performance and the methods of measurement of RadioMicrophones and In-ear monitoring systems as specified in the scope. In-ear monitoring systems may be tested to eitherthe present document (< 200 kHz max. occupied bandwidth) or to EN 301 357 [9] (< 300 kHz max. occupiedbandwidth) with due consideration of power and operating frequency.Since the initial adoption of I-ETS 300 422 there has been the introduction of further types of equipment - Cordlessheadphones/loudspeakers and consumer In-ear monitoring. These are low power wideband systems that have somecharacteristics in common with radio microphones but are not compatible with multichannel radio microphones. Thisequipment is covered by EN 301 357 [9].The present document also covers radio microphones used in the 863 MHz to 865MHz band, with a maximum power of10 mW.Type test measurements should be performed in one of the accredited test laboratories, accepted by the various nationalregulatory authorities in order to grant type approval, provided the national regulatory requirements are met. This is incompliance with CEPT/ERC Recommendation 01-06 [2] and ERC Decision ERC/DEC(97) 10 [3].In addition, national administrations may accept a "certificate of conformity" based on a type test report. If equipmentavailable on the market is required to be checked, it should be tested in accordance with the methods of measurementspecified in the present document.SIST EN 300 422 V1.2.1:2003



ETSIETSI EN 300 422 V1.2.1 (1999-07)81ScopeThe present document covers the minimum characteristics considered necessary in order to make the best use of theavailable frequencies. It does not necessarily include all the characteristics that may be required by a user, nor does itnecessarily represent the optimum performance achievable.The present document applies to equipment with modulation systems operating on radio frequencies between 25 MHzand 3 GHz. Although analogue Frequency Modulation (FM) is at present used for the majority of radio microphones andother equipment covered by the present document, this specification does not preclude any other constant carriermodulation technique, e.g. Gaussian Filtered Minimum Shift Keying (GMSK) or Generalized Tamed FrequencyModulation (GTFM), provided that the modulation spectrum lies within a standardized spectral mask.The present document does not apply to radio microphones or in ear monitoring equipment employing Time DivisionMultiple Access (TDMA), frequency hopping and spread spectrum or similar forms of modulation.Electromagnetic compatibility (EMC) requirements are covered by ETS 300 445 [8].Additional standards or specifications may be required for equipment intended to interface to the Public SwitchedTelephone Network (PSTN). This facility may be submitted to regulatory conditions.The present document may be used by accredited test laboratories for type testing of the equipment. The performance ofthe equipment submitted for type testing should be representative of the performance of the corresponding productionmodels.The present document contains instructions for the presentation of equipment for type testing purposes.Power limits recommended in the present document have been chosen to allow maximum simultaneous reusage offrequency allocations. National regulations on power output may apply up to the limits quoted below.NOTE:For higher power equipment reference should be made to ETS 300 454 [7] Wide band audio links.Equipmenteffective radiated power (erp)or conductedClass 1Class 2Radio Microphones50 mW2 mWIn ear monitoring10 mW2 mWTour guide systems10 mW2 mWAids for the handicapped10 mW2 mWThe types of equipment covered by the present document are as follows:-professional hand held radio microphones;-professional body worn radio microphones;-in ear monitoring systems;-consumer radio microphones;-tour guide systems;-aids for the handicapped.The classes of equipment given in the present document are as follows:-class 1 equipment would normally be considered as a category requiring an operator licence;-class 2 equipment would be considered in some countries as not requiring an operator licence.SIST EN 300 422 V1.2.1:2003



ETSIETSI EN 300 422 V1.2.1 (1999-07)92ReferencesThe following documents contain provisions which, through reference in this text, constitute provisions of the presentdocument.· References are either specific (identified by date of publication, edition number, version number, etc.) ornon-specific.· For a specific reference, subsequent revisions do not apply.· For a non-specific reference, the latest version applies.· A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the samenumber.[1]CEPT Recommendation T/R 20-06 (1977): "Transmitters and receivers for low-power CordlessMicrophone systems".[2]CEPT/ERC Recommendation 01-06: "Procedure for mutual recognition of type testing and typeapproval for radio equipment".[3]CEPT/ERC/DEC(97) 10: "The mutual recognition of conformity assessment procedures includingmarking of radio equipment and radio terminal equipment".[4]ITU-R Recommendation BS.559-2: "Objective measurement of radio-frequency protection ratiosin LF, MF and HF broadcasting".[5]IEC 60244: "Methods of measurement for radio transmitters".[6]ETR 028: "Radio Equipment and Systems (RES); Uncertainties in the measurement of mobileradio equipment characteristics".[7]ETS 300 454 including A1: "Radio Equipment and Systems (RES); Wide band audio links;Technical characteristics and test methods".[8]ETS 300 445 including A1: "Radio Equipment and Systems (RES); ElectroMagnetic Compatibility(EMC) standard for wireless microphones and similar Radio Frequency (RF) audio linkequipment".[9]EN 301 357: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Technicalcharacteristics and test methods for analogue cordless wideband audio devices using integralantennas operating in the CEPT recommended 863 MHz to 865 MHz frequency range".[10]ITU-R Recommendation BS.468-4: "Measurement of audio-frequency noise voltage level in soundbroadcasting".[11]CEPT/ERC Recommendation 70-03 relating to the use of short range devices (SRD).3Definitions, symbols and abbreviations3.1DefinitionsFor the purposes of the present document, the following terms and definitions apply:conducted measurements: measurements that are made using a direct 50 W connection to the EUTintegral antenna: antenna, with or without a connector, designed as, and declared as by the manufacturer, anindispensable part of the equipmentintegral microphone: microphone, designed as, and declared as by the manufacturer, an indispensable fixed part of theequipmentSIST EN 300 422 V1.2.1:2003



ETSIETSI EN 300 422 V1.2.1 (1999-07)10limiter threshold: audio input or output level at which the transmitter audio limiter action may be said to commence. Itis specified with any accessible variable gain controls set according to the manufacturer's instructions, with a sinusoidalinput signal of 500 Hzradiated measurements: measurements that involve the absolute measurement of a radiated electromagnetic fieldcarrier grid: evenly spaced raster in a given frequency band for the allocation of carrier frequencies. The minimumdistance of two carriers in use is a multiple of the raster dependent on type and usage of the equipmentchannel bandwidth: frequency band of defined width (as a multiple of the carrier grid) including safety margin foroperation on adjacent channels, located symmetrically around carrier frequency in the carrier gridport: any connection point on or within the Equipment Under Test (EUT) intended for the connection of cables to
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