SIST EN 301 357 V1.1.1:2003

ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Technical characteristics and test methods for analogue cordless wideband audio devices using integral antennas operating in the CEPT recommended 863 MHz to 865 MHz frequency range

Amend I-ETS 300 422 to upgrade spectrum management aspects and convert to EN. Extend scope to cover: Cordless audio headphones (mono & stereo); cordless audio loudspeakers; professional in-ear monitoring systems.

Elektromagnetna združljivost in zadeve v zvezi z radijskim spektrom (ERM) – Tehnične karakteristike in preskusne metode za analogne brezvrvične širokopasovne avdio naprave, ki uporabljajo vgrajene antene in delujejo v frekvenčnem območju 863 MHz do 865 MHz, ki ga je priporočila konferenca CEPT

General Information

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.060.99 - Other equipment for radiocommunications
• ICS: 33.100.01 - Electromagnetic compatibility in general
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI EN 301 357 V1.1.1 (1999-04) - ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Technical characteristics and test methods for analogue cordless wideband audio devices using integral antennas operating in the CEPT recommended 863 MHz to 865 MHz frequency range

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.QHElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Technical characteristics and test methods for analogue cordless wideband audio devices using integral antennas operating in the CEPT recommended 863 MHz to 865 MHz frequency range33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general33.060.99Druga oprema za radijske komunikacijeOther equipment for radiocommunicationsICS:Ta slovenski standard je istoveten z:EN 301 357 Version 1.1.1SIST EN 301 357 V1.1.1:2003en01-december-2003SIST EN 301 357 V1.1.1:2003SLOVENSKI
STANDARD
ETSI EN 301 357 V1.1.1 (1999-07)European Standard (Telecommunications series)Electromagnetic compatibilityand Radio spectrum Matters (ERM);Technical characteristics and test methodsfor analogue cordless wideband audio devicesusing integral antennas operating in the CEPT recommended863 MHz to 865 MHz frequency rangeSIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)2ReferenceDEN/ERM-RP08-0307 (ckc00ico.PDF)Keywordsradio, 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 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)3ContentsIntellectual Property Rights.6Foreword.6Introduction.61Scope.82References.93Definitions, symbols and abbreviations.93.1Definitions.93.2Symbols.103.3Abbreviations.104Functional characteristics.104.1Cordless wideband audio.104.2In-ear monitoring.114.3In-vehicle cordless.114.4Personal cordless.115General.115.1Presentation of equipment for testing purposes.115.1.1Choice of model for type testing.115.1.2Definitions of alignment and switching ranges.125.1.3 Alignment Range.125.1.4Choice of frequencies.125.1.5Testing of single channel equipment.125.1.6Testing of two channel equipment.125.1.7Testing of multi-channel equipment (more than two channels).125.1.8Testing of equipment with an external frequency rotary control.135.1.9Testing of equipment with an integral antenna.135.1.9.1Equipment with a permanent internal RF port.135.1.9.2Equipment with a temporary RF port.135.2Mechanical and electrical design.135.2.1General.135.2.2Controls.135.2.3Integral antenna.135.2.4Marking.145.2.4.1Equipment identification.145.2.4.2Regulatory marking.145.3Interpretation of the measurement results.146Test conditions, power sources and ambient conditions.146.1Normal and extreme test-conditions.146.2Test power source.146.3Normal test conditions.156.3.1Normal temperature and humidity.156.3.2Normal test power source voltage.156.3.2.1Mains voltage.156.3.2.2Nickel-cadmium cells.156.3.2.3Other power sources.156.4Extreme test conditions.156.4.1Extreme temperatures.156.4.1.1Procedures for tests at extreme temperatures.156.4.2Extreme test power source voltages.166.4.2.1Mains voltage.166.4.2.2Re-chargeable battery power sources.166.4.2.3Power sources using other types of batteries.16SIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)46.4.2.4Other power sources.167General conditions.177.1Normal test modulation.177.2Test fixture.187.3Test site and general arrangements for radiated measurements.187.4Modes of operation of the transmitter.187.5Arrangement for test signals at the input of the transmitter.198Methods of measurement and limits for transmitter parameters.198.1Frequency error.198.1.1Definition.198.1.2Method of measurement.198.1.3Limit.198.2Carrier power.198.2.1Definition.198.2.2Method of measurement for equipment with integral antenna.208.2.2.1Method of measurement under normal test conditions.208.2.2.2Method of measurement under extreme test conditions.208.2.3Limit.208.3 Channel bandwidth.218.3.1Definition.218.3.2Measurement of Necessary Bandwidth (BN).218.3.3Limits.218.3.4Edge of Band Limits.218.4Spurious emissions.228.4.1Definitions.228.4.2Method of measuring the effective radiated power.228.4.3Limits.228.4.4Measuring receiver.238.5 Transmitter shutoff.238.5.1Definition.238.5.2Method of measurement.238.5.3Limits.239Receiver.249.1Spurious emissions.249.1.1Definitions.249.1.2Method of measuring the power level in a specified load.249.1.3Method of measuring the effective radiated power of the enclosure.249.1.4Method of measuring the effective radiated power.259.1.5Limits.2510Measurement uncertainty.25Annex A (normative):Radiated measurement.26A.1Test sites and general arrangements for measurements involving the use of radiated fields.26A.1.1Outdoor test site.26A.1.1.1Test support for body worn equipment.26A.1.1.2Standard position.27A.1.2Test antenna.27A.1.3Substitution antenna.27A.1.4Optional additional indoor site.28A.2Guidance on the use of radiation test sites.28A.2.1Measuring distance.29A.2.2Test antenna.29A.2.3Substitution antenna.29A.2.4Artificial antenna.29A.2.5Auxiliary cables.29SIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)5A.3Further optional alternative indoor test site using an anechoic chamber.29A.3.1Example of the construction of a shielded anechoic chamber.30A.3.2Influence of parasitic reflections in anechoic chambers.30A.3.3Calibration of the shielded anechoic chamber.31Bibliography.33History.34SIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (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 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:25 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 2000IntroductionIn 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.The present document provides the necessary parameters for equipment to obtain common approval throughout Europe.Common technical specifications and harmonized frequency allocations are expected to reduce the present problems ofinterference 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, widebandcordless audio equipment as specified in the scope. In-ear monitoring equipment may be tested to either EN 300 422 [8]for equipment with maximum occupied bandwidth < 200 kHz or the present document for equipment with maximumoccupied bandwidth < 300 kHz with due consideration of power and operating frequency.SIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)7Type 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/REC 01-06 [1] and CEPT/ERC/DEC (97) 10 [2].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 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (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 wideband cordless audio and in-ear monitoring equipment operating in the CEPTrecommended band 863 MHz to 865 MHz using analogue frequency modulation. In some countries this equipment maybe used in other frequency bands as specified in their national regulations.The present document does not apply to wideband cordless audio or in-ear monitoring systems employing digitalmodulation, Time Division Multiple Access (TDMA), frequency hopping and spread spectrum or similar forms ofmodulation.EN 300 422 [8] applies to consumer radio microphones operating in the CEPT recommended band 863 MHz to 865MHz with a maximum power level of 10mW.Electromagnetic Compatibility (EMC) requirements are covered by ETS 300 445 [7].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 re-usage offrequency allocations. National regulations on power output may apply up to the limits quoted in table 1.Table 1Equipmentmax effective radiated power (erp)Wideband cordless audio10 mWIn-ear monitoring10 mWIn-vehicle cordless2 mWPersonal cordless1 mWThe types of equipment covered by the present document are as follows:-cordless headphones;-cordless loudspeakers;-in-ear monitoring;-in-vehicle cordless;-personal cordless.SIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (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/ERC/REC 01-06: "Procedure for mutual recognition of type testing and type approval forradio equipment".[2]CEPT/ERC/DEC (97) 10: "ERC Decision of 30 June 1997 on the mutual recognition ofconformity assessment procedures including marking of radio equipment and radio terminalequipment".[3]ITU-R Recommendation BS.559-2: "Objective measurement of radio-frequency protection ratiosin LF, MF and HF broadcasting".[4]IEC 60244: "Methods of measurement for radio transmitters".[5]ETR 028: "Radio Equipment and Systems (RES); Uncertainties in the measurement of mobileradio equipment characteristics".[6]CEPT/ERC/REC 70-03: "Relating to the use of Short Range Devices (SRD)".[7]ETS 300 445 (including Amendment 1): "Radio Equipment and Systems (RES); ElectroMagneticCompatibility (EMC) standard for wireless microphones and similar Radio Frequency (RF) audiolink equipment".[8]EN 300 422 (V1.2): "Electromagnetic compatibility and Radio spectrum Matters (ERM);Technical characteristics and test methods for wireless microphones in the 25 MHz to 3 GHzfrequency range".3Definitions, symbols and abbreviations3.1DefinitionsFor the purposes of the present document, the following terms and definitions apply:integral antenna: permanent fixed antenna, which may be built-in, designed as an indispensable part of the equipmentartificial antenna: tuned reduced-radiating dummy load equal to the nominal impedance specified by the applicantradiated measurements: measurements that involve the absolute measurement of a radiated electromagnetic fieldchannel bandwidth: frequency band of defined width including safety margin for operation on adjacent channels,located symmetrically around the carrier frequencyport: any connection point on or within the Equipment Under Test (EUT) intended for the connection of cables to orfrom that equipmentSIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)103.2SymbolsFor the purposes of the present document, the following symbols apply:lwavelength in metresµFmicroFaradµWmicroWattdBcdB relative to the carrier levelEfield strengthEoreference field strength (see annex A)fccarrier frequencyfooperating frequencyGHzGigaHertzkHzkiloHertzMHzMegaHertzmWmilliWattnWnanoWattRdistance (see annex A)Roreference distance (see annex A)3.3AbbreviationsFor the purposes of the present document, the following abbreviations apply:acalternating currentBChannel BandwidthBNNecessary Bandwidthdcdirect currenterpeffective radiated powerEUTEquipment Under TestHFHigh FrequencyLFLow FrequencyMFMedium FrequencyRBWResolution BandWidthRFRadio FrequencySRDShort Range DevicesTDMATime Division Multiple AccessTxTransmitterVBWVideo BandWidth4Functional characteristics4.1Cordless wideband audioCordless wideband audio equipment encompasses radio linked headphones and loudspeakers. The transmitters may beinstalled in a building, fitted in a vehicle or body worn The term cordless is also used to describe infra red and other nonRF "wireless" links, but in the context of the present document It is restricted to RF operating systems only. Stereoequipment can be designed for required channel bandwidths of 200 kHz or less but only with a high cost penalty,however consumer wideband (multichannel) audio equipment and stereo equipment using Zenith-GE pilot tone systemsneed to declare wider bandwidths as defined in this part of the present document.Other equipment that may be connected to cordless audio equipment shall fulfil the standards applicable to thatequipment (if any).SIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)114.2In-ear monitoringIn-ear monitoring equipment is used by stage and studio performers to receive personal fold back (monitoring) of theperformance. This can be just their own voice or a complex mix of sources.Other equipment that may be connected to in-ear monitoring equipment shall fulfil the standards applicable to thatequipment (if any).4.3In-vehicle cordlessIn vehicle systems are used for private listening in automobiles and other methods of transport (where permitted).4.4Personal cordlessPersonal cordless transmitters are to enable the body worn personal stereo equipment to be wire free.5General5.1Presentation of equipment for testing purposesEach equipment submitted for type testing shall fulfil the requirements of the present document on all channels overwhich it is intended to operate.The applicant shall complete the appropriate application form when submitting equipment for type testing.The applicant shall state the channel bandwidth(s) within which the equipment is designed to operate.The applicant shall also supply all relevant interface information to allow:-direct current (dc) power connection;-audio connection;-the deviation limiting of the transmitter; and-the setting of any input audio level controls and input signal level for normal operation, for a sinusoidal inputsignal of 500 Hz. The manufacturer shall specify the settings of any other controls necessary to avoid invalidatingthe test measurements.Besides the technical documentation, the applicant should also supply an operating manual for the device(s).To simplify and harmonize the type testing procedures between the different test laboratories, measurement shall beperformed, according to the present document, on samples of equipment defined in subclauses 5.1.1 to 5.1.9.2These subclauses are intended to give confidence that the requirements set out in the present document have been metwithout the necessity of performing measurements on all channels.5.1.1Choice of model for type testingThe applicant shall provide one sample of each model to be tested.If type approval is given on the basis of tests on a preliminary model, the corresponding production models shall beidentical in all respects with the preliminary model tested.SIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)125.1.2Definitions of alignment and switching rangesThe alignment range is defined as the frequency range over which the receiver and the transmitter can be programmedand/or re-aligned to operate with a single oscillator frequency multiplication, without any physical change ofcomponents other than:-programmable read only memories supplied by the manufacturer or the manufacturer's nominee;-crystals;-frequency setting elements (for the receiver and transmitter). These elements shall not be accessible to the enduser and shall be declared by the applicant in the application form.The switching range is the maximum frequency range over which the receiver or the transmitter can be operated withoutre-programming or realignment.The applicant shall, when submitting equipment for test, state the alignment ranges for the receiver and transmitter. Theapplicant shall also state the switching range of the receiver and the transmitter (which may differ).5.1.3 Alignment RangeThe alignment range for the receiver and transmitter, which may be different, is within the band 863 MHz to 865 MHz.5.1.4Choice of frequenciesThe frequencies for testing shall be chosen by the applicant, in accordance with subclauses 5.1.5 to 5.1.7.5.1.5Testing of single channel equipmentFull tests shall be carried out on a channel within 100 kHz of the centre frequency of the alignment range on one sampleof the equipment.5.1.6Testing of two channel equipmentOne sample shall be submitted to enable tests to be carried out on both channels.The frequency of the upper channel shall be within 100 kHz of the highest frequency of the switching range. Thefrequency of the lower channel shall be within 100 kHz of the lowest frequency of the switching range. In addition, theaverage of the frequencies of the two channels shall be within 100 kHz of the centre frequency of the alignment range.Full tests shall be carried out on both channels.5.1.7Testing of multi-channel equipment (more than two channels)One sample of the equipment shall be submitted to enable tests to be carried out on three channels. The centre frequencyof the switching range of the sample shall correspond to the centre frequency of the alignment range.Full tests shall be carried out on a frequency within 100 kHz of the centre, lowest and highest frequencies of theswitching range.SIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)135.1.8Testing of equipment with an external frequency rotary control.One sample shall be submitted to enable tests to be performed across the entire frequency band allowed by the rotarycontrol.The following tests shall be performed at either edge of the tuneable range of the equipment:-subclause 8.1: Frequency Error;-subclause 8.2: Carrier Power;-subclause 8.3: Channel Bandwidth.The following tests shall be performed with the frequency set to the middle of the tuneable range of the equipment:-subclause 8.4: Spurious Emissions;-subclause 8.5: Transmitter shutoff.5.1.9Testing of equipment with an integral antennaTo facilitate relative measurements, use may be made of a test fixture as described in subclause 7.3, or the equipmentmay be supplied with a permanent internal or temporary internal/external RF port.5.1.9.1Equipment with a permanent internal RF portThe way to access a permanent internal RF port shall be stated by the applicant with the aid of a diagram. The fact thatuse has been made of a permanent internal RF port shall be recorded in the test report.5.1.9.2Equipment with a temporary RF portThe applicant shall submit two sets of equipment to the test laboratory, one fitted with a temporary 50 W RF connectorwith the antenna disconnected and the other with the antenna connected. Each equipment shall be used for theappropriate tests.The way the temporary RF port is implemented shall be stated by the applicant with the aid of a diagram. The fact thatuse has been made of the temporary RF port to facilitate measurements shall be stated in the test report. The addition ofa temporary RF port should not influence the performance of the EUT.5.2Mechanical and electrical design5.2.1GeneralThe equipment submitted by the applicant shall be designed, constructed and manufactured in accordance with soundengineering practice, and with the aim of minimizing harmful interference to other equipment and services.5.2.2ControlsThose controls that, if maladjusted, might increase the interfering potentialities of the equipment shall only be accessibleby partial or complete disassembly of the device and requiring the use of tools.5.2.3Integral antennaType approval of equipment with integral antenna only applies to that equipment together with the antenna originallyprovided by the manufacturer for type testing.SIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)145.2.4MarkingThe equipment shall be marked in a visible place. This marking shall be legible and durable.5.2.4.1Equipment identificationThe marking shall include as a minimum:-the name of the applicant or his trade mark;-the type designation.5.2.4.2Regulatory markingThe equipment shall be marked, where applicable, in accordance with CEPT/ERC Recommendation 70-03 [6]. Wherethis is not applicable the equipment shall be marked in accordance with national regulatory requirements.5.3Interpretation of the measurement resultsThe interpretation of the results recorded in the appropriate test report for the measurements described in the presentdocument shall be as follows:-the measured value related to the corresponding limit shall be used to decide whether an equipment meets therequirements of the present document;-the measurement uncertainty value for the measurement of each parameter shall be separately included in the testreport;-the recorded value of the measurement uncertainty shall be, for each measurement, equal to or lower than thefigures in the table of measurement uncertainty as in clause 10.6Test conditions, power sources and ambientconditions6.1Normal and extreme test-conditionsType tests shall be made under normal test conditions, and also, where stated, under extreme test conditions.The test conditions and procedures shall be as specified in subclauses 6.2 to 6.4.2.4.6.2Test power sourceDuring type tests the power source of the equipment shall be replaced by a test power source, capable of producingnormal and extreme test voltages as specified in subclauses 6.3.2 and 6.4.2. The internal impedance of the test powersource shall be low enough for its effect on the test results to be negligible. For the purpose of the tests, the voltage ofthe power source shall be measured at the input terminals of the equipment.For battery operated equipment, the battery shall be removed and the test power source shall be suitably decoupled andapplied as close to the equipment battery terminals as practicable. For radiated measurements any external power leadsshould be arranged so as not to affect the measurements. If necessary the external power supply may be replaced withthe equipment's own internal batteries at the required voltage, this shall be stated on the test report.If the equipment is provided with a power cable or power socket, the test voltage shall be that measured at the point ofconnection of the power cable to the equipment.SIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)15During tests the power source voltages shall be within a tolerance of < ±1 % relative to the voltage at the beginning ofeach test. The value of this tolerance can be critical for certain measurements. Using a smaller tolerance provides abetter uncertainty value for these measurements. If internal batteries are used, at the end of each test the voltage shall bewithin a tolerance of < ±1 % relative to the voltage at the beginning of each test.6.3Normal test conditions6.3.1Normal temperature and humidityThe normal temperature and humidity conditions for tests shall be any convenient combination of temperature andhumidity within the following ranges:-temperature:+15 °C to +35 °C;-relative humidity:20 % to 75 %.When it is impracticable to carry out the tests under the conditions stated above, a note to this effect, stating the actualtemperature and relative humidity during the tests, shall be added to the test report.6.3.2Normal test power source voltage6.3.2.1Mains voltageThe normal test voltage for equipment to be connected to the mains shall be the nominal mains voltage. For the purposeof the present document, the nominal voltage shall be the declared mains voltage, or any of the declared mains voltages,for which the equipment was designed.The frequency of the test power source corresponding to the alternating current (ac) mains shall be between 49 Hz and51 Hz.6.3.2.2Nickel-cadmium cellsWhen the radio equipment is intended for operation from the usual types of nickel-cadmium cell the nominal test voltageshall be 1,2 V per cell.6.3.2.3Other power sourcesFor operation from other power sources or types of battery (primary or secondary), the normal test voltage shall be thatdeclared by the equipment manufacturer and approved by the test laboratory. The values shall be stated in the testreport.6.4Extreme test conditions6.4.1Extreme temperaturesFor tests at extreme temperatures, measurements shall be made in accordance with the procedures specified insubclause 6.4.1.1, at:a)-10 °C and +45 °C, for in-vehicle equipment;b)+5 °C and +45 °C, for all other types of equipment.6.4.1.1Procedures for tests at extreme temperaturesBefore measurements are made the equipment shall have reached thermal balance in the test chamber. The equipmentshall be switched off during the temperature stabilizing period. If the thermal balance is not checked by measurements, atemperature stabilizing period of at least one hour shall be allowed.SIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)16The sequence of measurements shall be chosen and the humidity content in the test chamber shall be controlled so thatexcessive condensation does not occur.Before tests at the higher temperatures, the equipment shall be placed in the test chamber and left until thermal balanceis attained. The equipment shall then be switched on for one minute in the transmit condition, after which the equipmentshall meet the specified requirements.For tests at the lower extreme temperature the equipment shall be left in the test chamber until thermal balance isattained, then switched to the standby or receive condition for one minute after which the equipment shall meet thespecified requirements.6.4.2Extreme test power source voltages6.4.2.1Mains voltageThe extreme test voltages for equipment to be connected to an ac mains source shall be the nominal mains voltage+10 %.The frequency of the test power source corresponding to the ac mains shall be between 49 Hz and 51 Hz.6.4.2.2Re-chargeable battery power sourcesWhen the radio equipment is intended for operation from nickel-cadmium cells, the extreme test voltage shall be 1,3 and0,9 times the nominal voltage of the battery. For other types of battery the lower extreme test voltage for dischargedcondition shall be declared by the equipment manufacturer.6.4.2.3Power sources using other types of batteriesThe lower extreme test voltages for equipment with power sources using primary batteries shall be as follows:-for Leclanché or lithium type of battery:-0,85 times the nominal voltage of the battery;-for mercury type of battery:-0,9 times the nominal voltage of the battery;-for other types of primary batteries:-end-point voltage declared by the equipment manufacturer.The nominal voltage is considered to be the upper extreme test voltage in this case.6.4.2.4Other power sourcesFor equipment using other power sources, or capable of being operated from a variety of power sources, the extreme testvoltages shall be those agreed between the equipment manufacturer and the testing laboratory and shall be recorded withthe results.SIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)177General conditions7.1Normal test modulationThe normal test modulation to produce the declared nominal deviation shall be a sinusoidal tone of 500 Hz, set at aninput level to the transmitter as defined by the manufacturer.For the purpose of determining the transmitter necessary bandwidth, coloured noise according toITU-R Recommendation BS.559-2 [3] shall be used, according to the method laid down in subclause 8.3.2. Theresulting spectral distribution is shown in figure 1. This noise may be generated by a white noise source followed by apassive filter shown in figure 2.Frequency (Hz)Curve A = Frequency spectrum of standardized noise (measured with one-third octave filters).Curve B = Frequency response characteristics of filter circuit.Figure 1: Spectral distribution for determining transmitter necessary bandwidthSIST EN 301 357 V1.1.1:2003

ETSIETSI EN 301 357 V1.1.1 (1999-07)18sR < 1006000,68 uF0,8 H7001 uF2,4 kR > = 5 k0,27 H3,5 kWWWWWWFigure 2: Filter circuit7.2Test fixtureThe applicant may be required to supply a test fixture suitable to allow relative measurements to be made on thesubmitted sample.In all cases, the test fixture shall provide:-a connection to an external power supply;-an audio interface.In addition, the test fixture for integral antenna equipment shall contain a radio frequency coupling device associatedwith an integral antenna equipment for coupling the integral antenna to an RF port at the working frequencies of the(EUT). This allows certain measurements to be performed using the conducted measurement methods. Only relativemeasurements may be performed and only those at or near frequencies for which the test fixture has been calibrated.The performance characteristics of the test fixture shall be agreed upon with the accredited test laboratory and shallconform to the following basic parameters:-the circuitry associated with the RF coupling shal
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