ETSI EN 300 422-1999 Electromagnetic Compatibility and Radio Spectrum Matters (ERM) Technical Charateristics and Test Methods for Wireless Microphones in the 25 MHz to 3 GHz Freque_1.pdf

1、ETSI EN 300 422 1.2.1 (1999-07) European Standad (Teiecornmunkatims senes) Electromagnetic compatibility and Radio spectrum Matters (ERM); Technical characteristics and test methods for wireless microphones in the 25 MHz to 3 GHz frequency range 2 ETSI EN 300 422 V1.2.1 (1 99947) Reference RENIERM-R

2、P08-0306 (3wdX)iOO.PDF) Kevwords ,- radio, radio mic, testing Postai address F-06921 Sophia Antipolis Cedex - FRANCE office address 650 Route des Lucioles - Sophia Antipoli Valbonne - FRANCE Association but non lucraif enregist Essential, or potentially Essential, IPRs notified to ETSI in respect of

3、 ETSI standards“, which is available free of charge from the ETSI Secretariat. Latest updates are available on the ETSI 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 guarantee can be given as to the ex

4、istence of other PRs not referenced in SR o00 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Electromagnetic compatibility an

5、d Radio spectrum Matters (ERM). Every EN prepared by ETSI is a voluntary standard. The present document may contain text concerning conformance testing of the equipment to which it relates. This text should be considered as guidance only and does not make the present document mandatory. Annex A prov

6、ides normative specifications concerning radiated measurements. Annex B describes the test set-up for the measurement of Necessary Bandwidth (EN). Annex C provides a graphic representation of the equipment and frequencies for the testing of single and multi-frequency equipment. I National transposit

7、ion dates Date of adoption of this EN: Date of latest announcement of this EN (doa): Date of latest publication of new National Standard or endorsement of this EN (dop/e): Date of withdrawal of any conflicting National Standard (dow): 18 June 1999 30 September 1999 31 March 2000 31 March2000 Introdu

8、ction The present document is based on the CEPT Recommendation T/R 20-06 i. This CEPT Recommendation has been a frame that led to many national prescriptions that differed, sometimes substantially, between European countries. The rapidly increasing quantities of wireless microphones (hereafter refer

9、red to as radio microphones) in operation, both legal and illegal, together with the greater mobility of the users, either professional or private, has led to a serious situation with many occurrences of interference and irregular operation. Legal radio microphones, being fundamentally low power dev

10、ices, are interfered with more than the generators of the interference, and suffer pnmarily from this situation. In preparing the present document, much attention has been given to assure a low interference probability, while at the same time allowing a maximum flexibility and service to the end-use

11、r. STDmETSI EN 300 422-ENGL L999 D 3400855 0423906 855 7 ETSI EN 300 422 V1.2.1 (199947) The 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

12、 frequency allocations. Common technical specifications and harmonized frequency allocations are expected to reduce greatly the present problems of interference and illegal use. The present document is a type testing standard based on spectrum utilization parameters and does not include performance

13、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 Radio Microphones and In-ear monitoring systems as specified in the scope. In-ear monitoring systems may b

14、e tested to either the present document (e 200 kHz max. occupied bandwidth) or to EN 301 357 9 (e 300 kHz max. occupied bandwidth) 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 - Cord

15、less headphoneslloudspeakekers and consumer In-ear monitoring. These are low power wideband systems that have some characteristics in common with radio microphones but are not compatible with multichannel radio microphones. This equipment is covered by EN 301 357 9. The present document also covers

16、radio microphones used in the 863 MHz to 865MHz band, with a maximum power of 10 mW. Type test measurements should be performed in one of the accredited test laboratories, accepted by the various national regulatory authorities in order to grant type approval, provided the national regulatory requir

17、ements are met. This is in compliance with CEPT/ERC Recommendation 01-06 2 and ERC Decision ERUDEC(97) 10 3. In addition, national administrations may accept a “certificate of conformity“ based on a type test report. If equipment available on the market is required to be checked. it should be tested

18、 in accordance with the methods of measurement specified in the present document. STD-ETSI EN 300 422-ENGL L999 ai 3400855 0423907 791 Equipment Radio Microphones In ear monitoring Tour guide systems Aids for the handicapped 8 ETSI EN 300 422 V1.2.1 (199947) effective radiated power (erp) or conduct

19、ed Class 1 Class 2 50 mW 2 mW 10 mW 2 mW 10 mW 2 mW 10 mW 2 mW The types of equipment covered by the present document are as follows: - - - in ear monitoring systems; - consumer radio microphones; - tour guide systems; - aids for the handicapped. professional hand held radio microphones; professiona

20、l body worn radio microphones; 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. 2 Ref e

21、re nces 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, edition number, version number, etc.) or non-specific. For a specific reference, subsequent revi

22、sions 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 same number. il CEPT Recommendation T/R 20-06 (1977): “Transmitters and receivers for low-power Cordless Microph

23、one systems“. CEF/ERC Recommendation 01-06: “Procedure for mutual recognition of type testing and type approval for radio equipment“. CEPTERCIDEC(97) 10 “The mutual recognition of conformity assessment procedures including marking of radio equipment and radio terminai equipment“. ITU-R Recommendatio

24、n BS.559-2 “Objective measurement of radio-frequency protection ratios in LF, MF and HF broadcasting“. IEC 60244: “Methods of measurement for radio transmitters“. ETR 028: “Radio Equipment and Systems (RES); Uncertainties in the measurement of mobile radio equipment characteristics“. ETS 300 454 inc

25、luding Al: “Radio Equipment and Systems (RES); Wide band audio links; Technical characteristics and test methods“. ETS 300 445 including Al: “Radio Equipment and Systems (RES); ElectroMagnetic Compatibility (EMC) standard for wireless microphones and similar Radio Frequency (RF) audio link equipment

26、“. EN 301 357: “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“. -R Recommendation BS.468-4: “Measurem

27、ent of audio-frequency noise voltage level in sound broadcasting“. CEPTERC Recommendation 70-03 relating to the use of short range devices (SRD). Pl 131 41 151 i61 i71 181 191 lo1 ill 3 3.1 Definitions, symbols and abbreviations Definit ions For the purposes of the present document, the following te

28、rms and definitions apply: conducted measurements: measurements that are made using a direct 50 R connection to the EUT integrai antenna: antenna, with or without a connector, designed as, and declared as by the manufacturer, an indispensable part of the equipment integral microphone: microphone, de

29、signed as, and declared as by the manufacturer, an indispensable fixed part of the equipment STD-ETSI EN 300 422-ENGL 3999 3400855 0423909 5b4 10 ETSI EN 300 422 V1.2.1 (199947) limiter threshold: audio input or output level at which the transmitter audio limiter action may be said to commence. It i

30、s specified with any accessible variable gain controls set according to the manufacturers instructions, with a sinusoidal input signal of 500 Hz radiated measurements measurements that involve the absolute measurement of a radiated electromagnetic field carrier grid: evenly spaced raster in a given

31、frequency band for the allocation of carrier frequencies. The minimum distance of two carriers in use is a multiple of the raster dependent on type and usage of the equipment channel bandwidth: frequency band of defined width (as a multiple of the carrier grid) including safety margin for operation

32、on adjacent channels, located symmetrically around carrier frequency in the carrier grid pork any connection point on or within the Equipment Under Test (EUT) intended for the connection of cables to or from that equipment Radio Frequency (RF) port: any connection point on or within the EUT intended

33、 for the connection of RF cables. RF ports are treated as 50 R connection points unless otherwise specified by the manufacturer 3.2 Symbols For the purposes of the present document, the following symbols apply: h CiF Ciw dBC E Eo fc fo GHZ H kHZ lim MHZ mW nW R Ro 3.3 wavelength in metres microFarad

34、 microwatt dB relative to the carrier level field strength reference field strength, (see annex A) carrier frequency operating frequency gigaHertz Henry kiloHertz limiting megaHertz milliwatt nanoWatt distance, (see annex A) reference distance, (see annex A) Abbreviations For the purposes of the pre

35、sent document, the following abbreviations apply: ac AR1 AR2 B BN dc erp EUT GMSK GTFM LF PSTN RBW RF alternating current Alignment Range 1 Alignment Range 2 declared channel Bandwidth (see table 1) Necessary Bandwidth direct current effective radiated power Equipment Under Test Gaussian Filtered Mi

36、nimum Shift Keying Generalized Tamed Frequency Modulation Low Frequency Public Switched Telephone Network Resolution Bandwidth Radio Frequency 11 Declared channel Bandwidth (e) 50 kHz 75 kHz 1 O0 kHz 150 kHz 200 kHz ETSI EN 300 422 V1.2.1 (199947) eslgnation L M P Q R TDMA Time Division Multiple Acc

37、ess Tx Transmitter VBW Video Bandwidth 4 Functional characteristics 4.1 Radio microphone descriptions Radio microphones normally use wide band frequency modulation to achieve the necessary audio performance for professional use. For the majority of applications the modulated transmitter signal requi

38、res a channel bandwidth of 200 kH2. The radio part of the transmitter and receiver shall be made up exclusively from equipment that has been approved according to the present document. Other equipment that may be connected to radio microphones shall fulfil the standards applicable to that equipment

39、(if any). 4.2 In ear monitoring In ear monitoring equipment is used by stage and studio performers to receive personal fold back (monitoring) of the performance. This can be just their own voice or a complex mix of sources. The bandwidth requirement of professional in ear monitoring equipment is sim

40、ilar to those of radio microphones. The radio part of the transmitter and receiver shall be made up exclusively from equipment that has been approved according to the present document. Other equipment that may be connected to in ear monitoring equipment shall fulfil the standards applicable to that

41、equipment (if any). 5 General 5.1 Presentation of equipment for testing purposes Each equipment submitted for type testing shall fulfil the requirements of the present document on all channels over which it is intended to operate. The applicant shall complete the appropriate application form when su

42、bmitting equipment for type testing. For radio microphones that may use a variety of audio capsules the manufacturer shall supply the test sample with an audio test fixture, to substitute the audio capsule, with suitable input and output impedance. The applicant shall state the channel bandwidth(s)

43、within which the equipment is designed to operate chosen from table 1. Table 1 : Channel bandwidth The applicant shall state the audio input limiting threshold, (see subclause 5.2.2). STD*ETSI EN 300 422-ENGL 1999 3400855 042L9LL LL2 m 12 ETSI EN 300 422 V1.2.1 (1 99407) The applicant shall also sup

44、ply all relevant interface information to allow: - direct current (dc) power connection: - RF connection; - audio connection; - - the limiting of the transmitter; and the setting of any input audio level controls for normal operation, for a sinusoidal input signal of 500 Hz. The manufacturer shall s

45、pecify the settings of any other controls necessary to avoid invalidating the test measurements. Besides the technical documentation. the applicant should also supply an operating manual for the device). To simplify and harmonize the type testing procedures between the different test laboratories. m

46、easurement shall be performed, according to the present document, on samples of equipment defined in subclauses 5.1.1 to 5.1.12.2. These subclauses are intended to give confidence that the requirements set out in the present document have been met without the necessity of performing measurements on

47、all channels. 5.1 .I Choice of model for type testing The applicant shall provide one or more production model(s) of the equipment, including all antenna) designed for the equipment, and that are required to be covered by the type testing. If type approval is given on the basis of tests on a prelimi

48、nary model, the corresponding production models shall be identical in all respects with the preliminary model tested. in the case of radio microphone equipment without a permanent external RF port, see subclause 5.1.12. 5.1.2 Definitions of alignment and switching ranges The alignment range is defin

49、ed as the frequency range over which the receiver and the transmitter can be programmed andlor re-aligned to operate with a single oscillator frequency multiplication, without any physical change of components other than: - programmable read only memories supplied by the manufacturer or the manufacturers nominee; - crystals; - frequency setting elements (for the receiver and transmitter). These elements shall not be accessible to the end user and shall be declared by the applicant in the application form. The switching range is the maximum frequency range ov