SIST EN 301 357-1 V1.4.1:2009

• Abstract:

  The present document covers the minimum characteristics for cordless audio devices considered necessary in order to make the best use of the available frequencies. It does not necessarily include all the characteristics that may be required by a user, nor does it necessarily represent the optimum performance achievable. Cordless audio devices covered within the present document are considered, by definition, Short Range Devices (SRD), the power limits for different frequency bands can be found in the current version of CEPT/ERC/REC 70-03 [i.2], annex 13 (or European or national regulations). Stereo equipment can be designed for required channel bandwidths of 200 kHz or less, however consumer wideband (multi channel) audio equipment and stereo equipment using e.g. Zenith-GE pilot tone systems or digital modulation may need wider bandwidths as defined in the present document. The present document is intended to specify the minimum performance and the methods of measurement of cordless audio equipment in the range 25 MHz to 2 000 MHz, including:; • cordless headphones;; • cordless loudspeakers;; • consumer radio microphones in the range 863 MHz to 865 MHz;; • in-ear monitoring equipment using either 300 kHz bandwidth analogue modulation or 300 kHz, 600 kHz, 1 200 kHz digital FDMA modulation in the range 863 MHz to 865 MHz;; • in-vehicle cordless;; • personal cordless;; • broadband multi channel audio systems;; • Band II LPD (low power devices) in the 87,5 MHz to 108 MHz range (Broadcasting Band II) using up to 200 kHz bandwidth and analogue modulation;; • and other devices and frequency bands defined within CEPT/ERC/REC 70-03 [i.2], European or National regulation. The frequency bands for this equipment may differ from country to country as specified in their national regulations. All equipment is intended to be used with integral antennas.; Annex A provides normative specifications concerning radiated measurements.; Annex B provides the test configuration for the measurement of necessary bandwidth.; Annex C provides informative parameters on the receiver part, which are intended to give guidance to manufacturers.; Annex D provides information on the derivation of radiated emissions limits for Band II LPD.; Annex E provides a justification for field strength limits for Band II LPD.; Annex F provides details of a typical test layout for Band II LPD.; Annex G contains the Bibliography.

• Status: Published
• Public Enquiry End Date: 31-Mar-2008
• Publication Date: 05-Feb-2009
• ICS: 33.060.99 - Other equipment for radiocommunications
• ICS: 33.100.01 - Electromagnetic compatibility in general
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 09-Jan-2009
• Due Date: 16-Mar-2009
• Completion Date: 06-Feb-2009
• Ref Project: ETSI EN 301 357-1 V1.4.1 (2008-09) - 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

SIST EN 301 357-1 V1.4.1:2009 is the Slovenian adoption of ETSI EN 301 357-1 for cordless audio devices in the 25 MHz to 2 000 MHz range. It specifies minimum technical characteristics and test methods for equipment such as cordless headphones, loudspeakers, consumer radio microphones, in-ear monitoring equipment, in-vehicle and personal cordless systems, broadband multi channel audio systems, and Band II LPD.

The standard is aimed at manufacturers, test laboratories, and compliance teams that need a common basis for measuring radio performance and spectrum use. It focuses on practical test setups, transmitter and receiver measurements, and the uncertainty limits needed to judge whether a device meets the standard.

What does SIST EN 301 357-1 V1.4.1:2009 specify?

SIST EN 301 357-1 V1.4.1:2009 specifies the minimum characteristics and measurement methods for cordless audio equipment using integral antennas in the 25 MHz to 2 000 MHz range. The scope is intentionally limited to spectrum-use and testability: it does not try to define every user feature or the best performance a product could achieve.

The document covers cordless audio devices treated as Short Range Devices (SRD), with power limits linked to CEPT/ERC/REC 70-03 annex 13 or national or European regulations. It also notes that frequency bands may vary by country, so a product has to be checked against the rules where it is sold or used.

Main structure

• Clauses 1 to 3 cover scope, references, and definitions.
• Clause 4 describes the functional categories of cordless audio equipment.
• Clauses 5 to 7 set out how equipment is presented and tested.
• Clauses 8 to 10 give transmitter and receiver measurements, limits, and measurement uncertainty.
• Annexes A to G provide the detailed radiated methods, Band II LPD-specific material, and bibliography.

Annex	What it covers
Annex A	Normative radiated measurement methods, test sites, standard test position, coupling, and test fixture use
Annex B	Normative measurement of Necessary Bandwidth (BN)
Annex C	Normative receiver parameters, including blocking or desensitization and receiver frequency mask
Annex D	Informative derivation of radiated spurious emissions limits for Band II LPD
Annex E	Informative justification for field strength limits for Band II LPD
Annex F	Informative typical test layout for Band II LPD, including vehicle power leads
Annex G	Bibliography

What are the key requirements of SIST EN 301 357-1 V1.4.1:2009?

SIST EN 301 357-1 V1.4.1:2009 is built around repeatable test setups and a small set of spectrum-related checks that matter in practice: channel use, modulation, radiated emissions, bandwidth, and timeout. For a manufacturer or lab, the main task is to prove that the product behaves as declared across the intended operating range and under the specified test conditions.

Equipment submission and test setup

Clause 5 requires the submitted equipment to meet the standard on all channels over which it is intended to operate. The applicant must provide a test plan, the intended frequency range, relevant interface information, and the tools or fixtures needed to connect dc power, analogue audio, and any required test signals.

This matters because the lab needs a reproducible setup for deviation limiting, audio input level setting, and normal operation. For digital systems and integral antenna equipment, the document allows the use of a test fixture so that relative measurements can be made in a controlled way.

Test conditions and operating points

Clause 6 requires tests under normal conditions and, where stated, under extreme conditions. The power source may be replaced by a test power source, but the voltage must be controlled closely and measured at the equipment input terminals.

Clause 6 also calls for testing at the lowest, highest, and mid-way operating frequencies. In practice, that means you do not test every possible channel, but you must choose representative points that cover the declared tuning range.

Normal modulation and bandwidth testing

Clause 7 uses a 500 Hz sinusoidal tone as the normal test modulation for nominal deviation. For determining transmitter Necessary Bandwidth (BN), the standard uses coloured noise according to ITU-R Recommendation BS.559-2 and the method defined in clause 8.3.2.

That is important because the measured bandwidth must reflect the signal type the equipment is expected to transmit, not only a simple tone. If the device uses digital audio input, the test signal is applied through a suitable fixture.

Band II LPD-specific rules

Clause 8.1 gives the basic rules for Band II LPD. Band II LPD must stop transmitting within 1 minute after audio modulation is removed, and pilot tones may not be used to keep transmission going. The equipment must have an integral antenna, and the user interface must allow selectable frequencies within the stated Band II range using 50 kHz, 100 kHz, or 200 kHz steps.

For testing, Band II LPD is treated as battery powered unless a physically permanent connector exists for external power. Clause 8.2 also requires radiated power and radiated spurious emissions to be measured in both vertical and horizontal polarization.

Measurement limits, spurious emissions, and uncertainty

Clause 8 includes transmitter checks for effective radiated power, occupied bandwidth, frequency error, transmitter timeout, and radiated spurious emissions. For Band II LPD, the effective radiated power limit is given in clause 8.2.3, and the document also defines how to measure frequency error and occupied bandwidth.

Clauses 8.6 and 9 require spurious emissions and cabinet radiation to be measured for transmitter and receiver functions. Clause 10 then explains how to interpret results when measurement uncertainty is within, or above, the acceptable limit, and it gives allowable uncertainty values for cordless audio, radio microphones, and Band II LPD. In practice, that means the test report must show not only the measured values but also the uncertainty method used.

What terms does SIST EN 301 357-1 V1.4.1:2009 define?

• allocated or applicable band - The frequency band defined by national radio regulations for the equipment.
• artificial antenna - A tuned reduced-radiating dummy load used in place of a real antenna for testing.
• integral antenna - An antenna that is an indispensable part of the equipment as declared by the manufacturer.
• Necessary Bandwidth (BN) - The bandwidth just sufficient to transmit the information at the required rate and quality.
• occupied bandwidth - The width of spectrum containing the specified share of emitted power around the carrier.
• Equipment Under Test (EUT) - The item being measured in the test setup.
• spurious emission - Emission outside the necessary bandwidth that can be reduced without affecting the transmission of information.
• effective radiated power (e.r.p.) - The radiated power referenced to a dipole.

Who uses SIST EN 301 357-1 V1.4.1:2009?

SIST EN 301 357-1 V1.4.1:2009 is used by manufacturers of cordless audio products, test houses, and regulatory or quality teams checking radio performance. It is relevant to cordless headphones, loudspeakers, consumer radio microphones, in-ear monitoring equipment for stage and studio use, and in-vehicle or personal cordless systems.

It is also useful for buyers or product managers who need to compare test reports across suppliers, because it defines what is measured, how it is measured, and how the results are judged.

Which standards are used with SIST EN 301 357-1 V1.4.1:2009?

• ETSI EN 301 357-2 - The companion part covering the harmonized EN for essential requirements of article 3.2 of the R&TTE Directive.
• ETSI EN 301 489-9 - The EMC standard used for wireless microphones, similar RF audio link equipment, cordless audio, and in-ear monitoring devices.
• ETSI EN 301 489-1 - The common EMC technical requirements referenced for radio equipment.
• ETSI EN 300 220 - Used in the foreword for consumer audio equipment below 50 MHz with narrow band modulation.
• ETSI EN 300 422 - Used in the foreword for consumer radio microphones and in-ear monitoring equipment with occupied bandwidth below 200 kHz.
• ETSI TR 102 273 - Provides guidance on radiated methods of measurement and measurement uncertainties.
• ETSI TR 100 028 - Used for calculating measurement uncertainty.
• ANSI C63.5 - Used for calibration of antennas used in radiated emission measurements.
• IEC 60489-3 - Supports acoustic SINAD measurement for speech and analogue signal testing.
• ITU-R BS.559-2 - Provides the standardized noise used for necessary bandwidth measurement.

What does the SIST EN 301 357-1 V1.4.1:2009 document contain?

SIST EN 301 357-1 V1.4.1:2009 contains detailed test methods, setup guidance, and measurement logic rather than only limits. Clause 7 includes the standardized modulation and the figure-based noise/filter arrangement used for Necessary Bandwidth testing.

Annex A describes radiated test sites such as anechoic chambers and Open Area Test Site (OATS), plus standard positions, substitution methods, and fixture calibration. Annex B gives the setup for BN measurement, while Annex C gives receiver test guidance for blocking or desensitization and receiver frequency masks.

The document also includes Band II LPD-specific figures and explanations in Annexes D, E, and F, including the typical vehicle power lead layout used to avoid disturbing transmitter measurements.

Draft ETSI EN 301 357-1 V1.4.1 (2007-12)
European Standard (Telecommunications series)

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
2 Draft ETSI EN 301 357-1 V1.4.1 (2007-12)

Reference
REN/ERM-TG17WG3-261-1
Keywords
audio, radio, radio MIC, testing
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ETSI
3 Draft ETSI EN 301 357-1 V1.4.1 (2007-12)
Contents
Intellectual Property Rights.7
Foreword.7
Introduction .8
1 Scope.9
2 References.10
2.1 Normative references.10
3 Definitions, symbols and abbreviations .10
3.1 Definitions.10
3.2 Symbols.11
3.3 Abbreviations.11
4 Functional characteristics.12
4.1 Cordless audio.12
4.1.1 In-vehicle cordless.12
4.1.2 Personal cordless.12
4.1.3 Broadband multi channel systems .12
4.1.4 Band II LPD.12
4.2 Consumer radio microphones.12
4.3 In-ear monitoring.12
5 General.13
5.1 Presentation of equipment for testing purposes.13
5.1.1 Choice of model for performance testing .13
5.1.2 Definitions of alignment and switching ranges.13
5.1.3 Alignment Range.14
5.1.4 Choice of frequencies.14
5.1.5 Testing of single channel equipment .14
5.1.6 Testing of two channel equipment.14
5.1.7 Testing of multi-channel equipment (more than two channels).14
5.1.8 Testing of equipment with an external frequency control.14
5.1.9 Testing of equipment with an integral antenna.15
5.1.9.1 Equipment with a permanent internal RF port .15
5.1.9.2 Equipment with a temporary RF port.15
5.2 Mechanical and electrical design.15
5.2.1 General.15
5.2.2 Controls.15
5.2.3 Integral antenna.15
5.2.4 Marking.15
5.3 Interpretation of the measurement results .15
6 Test conditions, power sources and ambient conditions .16
6.1 Normal and extreme test-conditions.16
6.2 Test power source.16
6.3 Normal test conditions.16
6.3.1 Normal temperature and humidity.16
6.3.2 Normal test power source voltage.17
6.3.2.1 Mains voltage.17
6.3.2.2 Nickel-cadmium cells.17
6.3.2.3 Other power sources.17
6.4 Extreme test conditions .17
6.4.1 Extreme temperatures.17
6.4.1.1 Procedures for tests at extreme temperatures .17
6.4.2 Extreme test power source voltages.17
6.4.2.1 Mains voltage.17
6.4.2.2 Re-chargeable battery power sources.18
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4 Draft ETSI EN 301 357-1 V1.4.1 (2007-12)
6.4.2.3 Power sources using other types of batteries.18
6.4.2.4 Other power sources.18
7 General conditions.18
7.1 Normal test modulation.18
7.2 Test fixture.19
7.3 Test site and general arrangements for radiated measurements.20
7.4 Modes of operation of the transmitter .20
7.5 Arrangement for test signals at the input of the transmitter .20
8 Methods of measurement and limits for transmitter parameters .20
8.1 Basic requirements for Band II LPD .20
8.2 Methods of measurement and limits for transmitter parameters of Band II LPD.21
8.2.1 Test site and general arrangements for radiated measurements.21
8.2.2 Test modulation.21
8.2.3 Effective radiated power (e.r.p.) .22
8.2.3.1 Definition.22
8.2.3.2 Test procedure.22
8.2.3.3 Limits.22
8.2.3.4 Measurement uncertainty.22
8.2.4 Occupied bandwidth.22
8.2.4.1 Definition.22
8.2.4.2 Test procedure.22
8.2.4.3 Limits.23
8.2.4.4 Measurement uncertainty.23
8.2.5 Frequency step size.23
8.2.5.1 Definition.23
8.2.5.2 Test procedure.23
8.2.5.3 Limits.24
8.2.5.4 Measurement uncertainty.24
8.2.6 Frequency error.24
8.2.6.1 Definition.24
8.2.6.2 Test procedure.24
8.2.6.3 Limits.25
8.2.6.4 Measurement uncertainty.25
8.2.7 Transmitter timeout.25
8.2.7.1 Definitions.25
8.2.7.2 Test procedure.25
8.2.7.3 Limits.25
8.2.7.4 Measurement uncertainty.25
8.2.8 Radiated spurious emissions.25
8.2.8.1 Definitions.25
8.2.8.2 Measurement procedure.25
8.2.8.3 Limits.26
8.2.8.3.1 Band II LPD .26
8.2.8.3.2 Combined equipments.26
8.2.8.4 Measurement uncertainty.26
8.3 Frequency error.26
8.3.1 Definition.26
8.3.2 Method of measurement.26
8.3.3 Limit.27
8.4 Carrier power.27
8.4.1 Definition.27
8.4.2 Method of measurement for equipment with integral antenna.27
8.4.2.1 Method of measurement under normal test conditions .27
8.4.2.2 Method of measurement under extreme test conditions.28
8.4.3 Limit.28
8.5 Channel bandwidth.28
8.5.1 Definition.28
8.5.2 Measurement of Necessary Bandwidth (BN) .28
8.5.3 Limits.29
8.5.4 Edge of Band Limits.29
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5 Draft ETSI EN 301 357-1 V1.4.1 (2007-12)
8.6 Spurious emissions and cabinet radiation.30
8.6.1 Definitions.30
8.6.2 Method of measuring the effective radiated power.31
8.6.3 Limits.31
8.6.4 Measuring receiver.31
8.7 Cordless audio transmitter shutoff.32
8.7.1 Definition.32
8.7.2 Method of measurement.32
8.7.3 Limits.32
9 Receiver.32
9.1 Spurious emissions and cabinet radiation.32
9.1.1 Definitions.32
9.1.2 Method of measuring the power level in a specified load.32
9.1.3 Method of measuring the effective radiated power of the enclosure .33
9.1.4 Method of measuring the effective radiated power.33
9.1.5 Limits.33
10 Measurement uncertainty .34
10.1 Compliance assessment when measurement uncertainty is equal to or less than maximum acceptable
uncertainty.34
10.2 Compliance assessment when measurement uncertainty is greater than maximum acceptable uncertainty .34
10.3 Maximum allowable measurement uncertainties .34
Annex A (normative): Radiated measurement.35
A.1 Test sites and general arrangements for measurements involving the use of radiated fields .35
A.1.1 Anechoic chamber.35
A.1.2 Anechoic chamber with a conductive ground plane.36
A.1.3 Open Area Test Site (OATS) .37
A.1.4 Test antenna.38
A.1.5 Substitution antenna.39
A.1.6 Measuring antenna.39
A.1.7 Stripline arrangement.39
A.1.7.1 General.39
A.1.7.2 Description.39
A.1.7.3 Calibration.39
A.1.7.4 Mode of use .39
A.2 Guidance on the use of radiation test sites .40
A.2.1 Verification of the test site .40
A.2.2 Preparation of the EUT.40
A.2.3 Power supplies to the EUT.40
A.2.4 Volume control setting for analogue speech tests .40
A.2.5 Range length.41
A.2.6 Site preparation.41
A.3 Coupling of signals.42
A.3.1 General.42
A.3.2 Data Signals.42
A.3.3 Speech and analogue signals .42
A.3.3.1 Acoustic coupler description.42
A.3.3.2 Calibration.43
A.4 Standard test position .43
A.5 Test fixture.43
A.5.1 Description.43
A.5.2 Calibration.44
A.5.3 Mode of use.45
Annex B (normative): Measurement of Necessary Bandwidth (BN) .46
Annex C (informative): Receiver parameters.47
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6 Draft ETSI EN 301 357-1 V1.4.1 (2007-12)
C.1 Blocking or desensitization .47
C.1.1 Definition.47
C.1.2 Method of measurement.47
C.1.2.1 Measurement procedure.47
C.1.2.2 Definitions.47
C.1.2.3 Limits for applications below 1 GHz.48
C.1.2.4 Limits for applications above 1 GHz .48
C.2 Frequency mask for the receiver part.48
C.2.1 Definition.48
C.2.2 Method of measurement.48
C.2.3 Typical values for receivers.49
C.2.3.1 Typical values for receivers with analogue modulation.49
C.2.3.2 Typical values for receivers with digital modulation.49
Annex D (informative): Derivation of radiated spurious emissions limit for Band II LPD .50
Annex E (informative): Justifications for field strength measurement.51
Annex F (informative): Typical test layout.52
F.1 Use of vehicle power leads.52
Annex G (informative): Bibliography.53
History .54

ETSI
7 Draft ETSI EN 301 357-1 V1.4.1 (2007-12)
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 European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM), and is now submitted for the Public Enquiry phase
of the ETSI standards Two-step Approval Procedure.
The present document is part 1 of a multi-part deliverable covering cordless audio devices in the range 25 MHz to
2 000 MHz; as identified below:
Part 1: "Technical characteristics and test methods";
Part 2: "Harmonized EN covering essential requirements of article 3.2 of the R&TTE Directive".

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

ETSI
8 Draft ETSI EN 301 357-1 V1.4.1 (2007-12)
Introduction
In preparing the present document, attention has been given to assure a low interference probability, while at the same
time allowing a maximum flexibility and service to the end-user.
The harmonized standard EN 301 357-2 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 of interference and illegal use.
The present document is used for conformity testing based on spectrum utilization parameters and does not include
performance 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 cordless
audio equipment in the range 25 MHz to 2 000 MHz, including:
• consumer radio microphones and in ear monitoring equipment in the range 863 MHz to 865 MHz;
• Band II LPD (low power devices) in the 87,5 MHz to 108 MHz range (Broadcasting Band II);
• and other devices and frequency bands defined within CEPT/ERC/REC 70-03 or National regulation.
Consumer radio microphones and in ear monitoring equipment may be tested to either EN 300 422 for equipment with
maximum occupied bandwidth < 200 kHz or to the present document for equipment with maximum occupied
bandwidth > 200 kHz with due consideration of power and operating frequency.
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9 Draft ETSI EN 301 357-1 V1.4.1 (2007-12)
1 Scope
The present document covers the minimum characteristics considered necessary in order to make the best use of the
available frequencies. It does not necessarily include all the characteristics that may be required by a user, nor does it
necessarily represent the optimum performance achievable.
Cordless audio devices covered within the present document are considered, by definition, Short Range Devices (SRD),
the power limits for different frequency bands can be found in the current version of CEPT/ERC/REC 70-03, annex 13
(or national regulations).
Stereo equipment can be designed for required channel bandwidths of 200 kHz or less, however consumer wideband
(multi channel) audio equipment and stereo equipment using e.g. Zenith-GE pilot tone systems or digital modulation
may need wider bandwidths as defined in the present document.
The present document applies to cordless audio consumer radio microphones, in ear monitoring equipment using either
300 kHz bandwidth analogue modulation or:
• 300 kHz, 600 kHz, 1 200 kHz digital FDMA modulation; and
• Band II LPD (low power devices) using up to 200 kHz bandwidth and analogue modulation.
The frequency bands for this equipment may differ from country to country as specified in their national regulations.
All equipment is intended to be used with integral antennas.
Consumer audio equipment intended for audio and voice operating below 50 MHz and using narrow band modulation
are considered and tested according to EN 300 220.
Electromagnetic Compatibility (EMC) requirements are covered by EN 301 489-9.
The types of equipment covered by the present document are as follows:
- cordless headphones;
- cordless loudspeakers;
- consumer radio microphones;
- in-ear monitoring;
- in-vehicle cordless;
- personal cordless;
- broadband multi channel audio systems;
- Band II LPD.
Annex A provides normative specifications concerning radiated measurements.
Annex B provides the test configuration for the measurement of necessary bandwidth.
Annex C provides informative parameters on the receiver part, which are intended to give guidance to manufacturers.
Annex D provides information on the derivation of radiated emissions limits for Band II LPD.
Annex E provides a justification for field strength limits for Band II LPD.
Annex F provides details of a typical test layout for Band II LPD.
Annex G contains the Bibliography.
ETSI
10 Draft ETSI EN 301 357-1 V1.4.1 (2007-12)
2 References
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.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ITU-R Recommendation BS.559-2 (1990): "Objective measurement of radio-frequency protection
ratios in LF, MF and HF broadcasting".
[2] IEC 60244-13 (1991): "Methods of measurement for radio transmitters - Part 13: Performance
characteristics for FM sound broadcasting".
[3] ETSI TR 102 273 (all parts) (2001): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Improvement on Radiated Methods of Measurement (using test site) and evaluation of the
corresponding measurement uncertainties".
[4] ANSI C63.5 (2006): "American National Standard for Calibration of Antennas Used for Radiated
Emission Measurements in Electro Magnetic Interference".
[5] IEC 60489-3 (1988): "Methods of measurement for radio equipment used in the mobile services.
Part 3: Receivers for A3E or F3E emissions".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
artificial antenna: tuned reduced-radiating dummy load equal to the nominal impedance specified by the applicant
channel bandwidth: frequency band of defined width including safety margin for operation on adjacent channels,
located symmetrically around the carrier frequency
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11 Draft ETSI EN 301 357-1 V1.4.1 (2007-12)
integral antenna: antenna, with or without a connector, designed as, and declared as by the manufacturer, an
indispensable part of the equipment
integral antenna for Band II LPD only: permanent fixed antenna, which may be built-in, designed as an
indispensable part of the equipment
necessary bandwidth: for a given class of emission, the width of the frequency band which is just sufficient to ensure
the transmission of information at the rate and with the quality required under specified conditions
NOTE: However, the necessary bandwidths of most digital modulation formats are presently not referred to
ITU-R Recommendations of SM series.
occupied bandwidth: width of a frequency band such that, below the lower and above the upper frequency limits, the
mean powers emitted are each equal to a specified percentage β/2 of the total mean power of a given emission
NOTE: Unless otherwise specified in an ITU-R Recommendation for the appropriate class of emission, the value
of β/2 should be taken as 0,5 %.
port: any connection point on or within the Equipment Under Test (EUT) intended for the connection of cables to or
from that equipment
radiated measurements: measurements that involve the absolute measurement of a radiated electromagnetic field
spurious emission: emission on a frequency or frequencies which are outside the necessary bandwidth and the level of
which may be reduced without affecting the corresponding transmission of information
NOTE: Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and
frequency conversion products.
3.2 Symbols
For the purposes of the present document, the following symbols apply:
λ wavelength in metres
µF micro Farad
µW micro Watt
Ω ohm
dBc dB relative to the carrier level
E field strength
fc carrier frequency
fo operating frequency
GHz Giga Hertz
kHz kilo Hertz
MHz Mega Hertz
mW milli Watt
nW nano Watt
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ac alternating current
B channel Bandwidth
BN Necessary Bandwidth
CW Continuous Wave
dc direct current
e.r.p. effective radiated power
EUT Equipment Under Test
FDMA Frequency Division Multiple Access
FM Frequency Modulation
HF High Frequency
LF Low Frequency
ETSI
12 Draft ETSI EN 301 357-1 V1.4.1 (2007-12)
LPD Low Power Device
MF Medium Frequency
OATS Open Area Test Site
RBW Resolution BandWidth
RF Radio Frequency
SINAD (Signal + Noise + Distortion) to (Noise + Distortion)
SRD Short Range Devices
Tx Transmitter
VBW Video BandWidth
VSWR Voltage Standing Wave Ratio
4 Functional characteristics
4.1 Cordless audio
Cordless audio equipment encompasses e.g. radio linked headphones and loudspeakers. The transmitters may be
installed in a building, fitted in a vehicle or body worn. The term cordless is also used to describe infra red and other
non-RF "wireless" links, but in the context of the present document it is restricted to RF operating systems only. Stereo
equipment can be designed for required channel bandwidths of 200 kHz or less, however consumer wideband (multi
channel) audio equipment and stereo equipment using e.g. Zenith-GE pilot tone systems or digital modulation may need
wider bandwidths as defined in the present document.
Other equipment that may be connected to cordless audio equipment shall fulfil the standards applicable to that
equipment (if any).
4.1.1 In-vehicle cordless
In-vehicle systems are used for private listening in automobiles and other methods of transport (where permitted).
4.1.2 Personal cordless
Personal cordless transmitters are to enable the body worn personal stereo equipment to be wire free.
4.1.3 Broadband multi channel systems
Broadband multi channel systems are used for the transmission of high quality digital audio. These can be e.g. surround
sound systems or uncompressed audio. They are intended to be used in spectrum above 1 GHz.
4.1.4 Band II LPD
Short range low power FM transmitters operating in the FM Broadcast band 87,5 MHz to 108 MHz are used for the
provision of an RF link between a personal audio device, including mobile phone, and the in-car or home entertainment
system.
4.2 Consumer radio microphones
Consumer radio microphones are intended for non-professional applications.
4.3 In-ear monitoring
In-ear monitoring equipment is used
...

Final draft ETSI EN 301 357-1 V1.4.1 (2008-09)
European Standard (Telecommunications series)

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
2 Final draft ETSI EN 301 357-1 V1.4.1 (2008-09)

Reference
REN/ERM-TG17WG3-261-1
Keywords
audio, radio, radio MIC, testing
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

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 2008.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
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
3 Final draft ETSI EN 301 357-1 V1.4.1 (2008-09)
Contents
Intellectual Property Rights.7
Foreword.7
Introduction .7
1 Scope.8
2 References.9
2.1 Normative references.9
2.2 Informative references.9
3 Definitions, symbols and abbreviations .11
3.1 Definitions.11
3.2 Symbols.11
3.3 Abbreviations.12
4 Functional characteristics.12
4.1 Cordless audio.12
4.1.1 In-vehicle cordless.12
4.1.2 Personal cordless.12
4.1.3 Broadband multi channel systems .12
4.1.4 Band II LPD.13
4.2 Consumer radio microphones.13
4.3 In-ear monitoring.13
5 General.13
5.1 Presentation of equipment for testing purposes.13
5.1.1 Choice of model for performance testing .14
5.1.2 Definitions of alignment and switching ranges.14
5.1.3 Alignment Range.14
5.1.4 Choice of frequencies.14
5.1.4.1 Testing of single channel equipment.14
5.1.4.2 Testing of two channel equipment .14
5.1.4.3 Testing of multi-channel equipment (more than two channels) .14
5.1.5 Testing of equipment with an external frequency control.15
5.1.6 Testing of equipment with an integral antenna.15
5.1.6.1 Equipment with a permanent internal RF port .15
5.1.6.2 Equipment with a temporary RF port.15
5.2 Mechanical and electrical design.15
5.2.1 General.15
5.2.2 Controls.15
5.2.3 Integral antenna.15
5.2.4 Marking.16
5.3 Interpretation of the measurement results .16
6 Test conditions, power sources and ambient conditions .16
6.1 Normal and extreme test-conditions.16
6.2 Test power source.16
6.3 Normal test conditions.16
6.3.1 Normal temperature and humidity.17
6.3.2 Normal test power source voltage.17
6.3.2.1 Mains voltage.17
6.3.2.2 Nickel-cadmium cells.17
6.3.2.3 Other power sources.17
6.4 Extreme test conditions .17
6.4.1 Extreme temperatures.17
6.4.1.1 Procedures for tests at extreme temperatures .17
6.4.2 Extreme test power source voltages.18
6.4.2.1 Mains voltage.18
ETSI
4 Final draft ETSI EN 301 357-1 V1.4.1 (2008-09)
6.4.2.2 Re-chargeable battery power sources.18
6.4.2.3 Power sources using other types of batteries.18
6.4.2.4 Other power sources.18
7 General conditions.18
7.1 Normal test modulation.18
7.2 Test fixture.19
7.3 Test site and general arrangements for radiated measurements.20
7.4 Modes of operation of the transmitter .20
7.5 Arrangement for test signals at the input of the transmitter .20
8 Methods of measurement and limits for transmitter parameters .20
8.1 Basic requirements for Band II LPD .20
8.2 Methods of measurement and limits for transmitter parameters of Band II LPD.21
8.2.1 Test site and general arrangements for radiated measurements.21
8.2.2 Test modulation.21
8.2.3 Effective radiated power (e.r.p.) .22
8.2.3.1 Definition.22
8.2.3.2 Test procedure.22
8.2.3.3 Limits.22
8.2.3.4 Measurement uncertainty.22
8.2.4 Occupied bandwidth.22
8.2.4.1 Definition.22
8.2.4.2 Test procedure.23
8.2.4.3 Limits.23
8.2.4.4 Measurement uncertainty.23
8.2.5 Frequency error.23
8.2.5.1 Definition.23
8.2.5.2 Test procedure.23
8.2.5.3 Limits.24
8.2.5.4 Measurement uncertainty.24
8.2.6 Transmitter timeout.24
8.2.6.1 Definitions.24
8.2.6.2 Test procedure.24
8.2.6.3 Limits.25
8.2.6.4 Measurement uncertainty.25
8.2.7 Radiated spurious emissions.25
8.2.7.1 Definitions.25
8.2.7.2 Measurement procedure.25
8.2.7.3 Limits.25
8.2.7.3.1 Band II LPD .25
8.2.7.3.2 Combined equipments.25
8.2.7.4 Measurement uncertainty.25
8.3 Frequency error.26
8.3.1 Definition.26
8.3.2 Method of measurement.26
8.3.3 Limit.26
8.4 Carrier power.26
8.4.1 Definition.26
8.4.2 Method of measurement for equipment with integral antenna.26
8.4.2.1 Method of measurement under normal test conditions .26
8.4.2.2 Method of measurement under extreme test conditions.27
8.4.3 Limit.27
8.5 Channel bandwidth.28
8.5.1 Definition.28
8.5.2 Measurement of Necessary Bandwidth (BN) .28
8.5.3 Limits.28
8.5.4 Edge of Band Limits.28
8.6 Spurious emissions and cabinet radiation.29
8.6.1 Definitions.30
8.6.2 Method of measuring the effective radiated power.30
8.6.3 Limits.30
ETSI
5 Final draft ETSI EN 301 357-1 V1.4.1 (2008-09)
8.6.4 Measuring receiver.30
8.7 Cordless audio transmitter shutoff.31
8.7.1 Definition.31
8.7.2 Method of measurement.31
8.7.3 Limits.31
9 Receiver.31
9.1 Spurious emissions and cabinet radiation.31
9.1.1 Definitions.31
9.1.2 Method of measuring the power level in a specified load.31
9.1.3 Method of measuring the effective radiated power of the enclosure .32
9.1.4 Method of measuring the effective radiated power.32
9.1.5 Limits.32
10 Measurement uncertainty .33
10.1 Compliance assessment when measurement uncertainty is equal to or less than maximum acceptable
uncertainty.33
10.2 Compliance assessment when measurement uncertainty is greater than maximum acceptable uncertainty .33
10.3 Maximum allowable measurement uncertainties for cordless audio and radio microphones.33
10.4 Maximum allowable measurement uncertainties for Band II LPD .34
Annex A (normative): Radiated measurement.35
A.1 Test sites and general arrangements for measurements involving the use of radiated fields .35
A.1.1 Anechoic chamber.35
A.1.2 Anechoic chamber with a conductive ground plane.36
A.1.3 Open Area Test Site (OATS) .37
A.1.4 Test antenna.38
A.1.5 Substitution antenna.39
A.1.6 Measuring antenna.39
A.1.7 Stripline arrangement.39
A.1.7.1 General.39
A.1.7.2 Description.39
A.1.7.3 Calibration.39
A.1.7.4 Mode of use .39
A.2 Guidance on the use of radiation test sites .40
A.2.1 Verification of the test site .40
A.2.2 Preparation of the EUT.40
A.2.3 Power supplies to the EUT.40
A.2.4 Volume control setting for analogue speech tests .40
A.2.5 Range length.41
A.2.6 Site preparation.41
A.3 Coupling of signals.42
A.3.1 General.42
A.3.2 Data Signals.42
A.3.3 Speech and analogue signals .42
A.3.3.1 Acoustic coupler description.42
A.3.3.2 Calibration.43
A.4 Standard test position .43
A.5 Test fixture.43
A.5.1 Description.43
A.5.2 Calibration.44
A.5.3 Mode of use.45
Annex B (normative): Measurement of Necessary Bandwidth (BN) .46
Annex C (normative): Receiver parameters.47
C.1 Blocking or desensitization .47
C.1.1 Definition.47
C.1.2 Method of measurement.47
ETSI
6 Final draft ETSI EN 301 357-1 V1.4.1 (2008-09)
C.1.2.1 Measurement procedure.47
C.1.2.2 Definitions.47
C.1.2.3 Limits for applications below 1 GHz.48
C.1.2.4 Limits for applications above 1 GHz .48
C.2 Frequency mask for the receiver part.48
C.2.1 Definition.48
C.2.2 Method of measurement.48
C.2.3 Typical values for receivers.49
C.2.3.1 Typical values for receivers with analogue modulation.49
C.2.3.2 Typical values for receivers with digital modulation.49
Annex D (informative): Derivation of radiated spurious emissions limit for Band II LPD .50
Annex E (informative): Justifications for field strength measurement.51
Annex F (informative): Typical test layout.52
F.1 Use of vehicle power leads.52
Annex G (informative): Bibliography.53
History .54

ETSI
7 Final draft ETSI EN 301 357-1 V1.4.1 (2008-09)
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 European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM), and is now submitted for the Vote phase of the
ETSI standards Two-step Approval Procedure.
Consumer audio equipment intended for audio and voice operating below 50 MHz and using narrow band modulation
are considered and tested according to EN 300 220 [i.3]. Consumer radio microphones and in ear monitoring equipment
may be tested to either EN 300 422 [i.4] for equipment with maximum occupied bandwidth < 200 kHz or to the present
document for equipment with maximum occupied bandwidth > 200 kHz with due consideration of power and operating
frequency.
Electromagnetic Compatibility (EMC) requirements are covered by EN 301 489-9 [i.5].
The present document is part 1 of a multi-part deliverable covering cordless audio devices in the range 25 MHz to
2 000 MHz; as identified below:
Part 1: "Technical characteristics and test methods";
Part 2: "Harmonized EN covering essential requirements of article 3.2 of the R&TTE Directive".

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

Introduction
In preparing the present document, attention has been given to assure a low interference probability, while at the same
time allowing a maximum flexibility and service to the end-user.
The harmonized standard EN 301 357-2 [i.6] provides the necessary parameters for equipment to obtain presumption of
conformity with article 3.2 of the R&TTE Directive [i.1]. Common technical specifications and harmonized frequency
allocations are expected to reduce the present problems of interference and illegal use.
The present document may be used for conformity testing based on spectrum utilization parameters and does not
include performance characteristics that may be required by the user or requirements for interfacing equipment.
If you are planning to use RDS please go to: http://www.rds.org.uk/rds98/rds98.htm for further information.
ETSI
8 Final draft ETSI EN 301 357-1 V1.4.1 (2008-09)
1 Scope
The present document covers the minimum characteristics for cordless audio devices considered necessary in order to
make the best use of the available frequencies. It does not necessarily include all the characteristics that may be required
by a user, nor does it necessarily represent the optimum performance achievable.
Cordless audio devices covered within the present document are considered, by definition, Short Range Devices (SRD),
the power limits for different frequency bands can be found in the current version of CEPT/ERC/REC 70-03 [i.2],
annex 13 (or European or national regulations).
Stereo equipment can be designed for required channel bandwidths of 200 kHz or less, however consumer wideband
(multi channel) audio equipment and stereo equipment using e.g. Zenith-GE pilot tone systems or digital modulation
may need wider bandwidths as defined in the present document.
The present document is intended to specify the minimum performance and the methods of measurement of cordless
audio equipment in the range 25 MHz to 2 000 MHz, including:
• cordless headphones;
• cordless loudspeakers;
• consumer radio microphones in the range 863 MHz to 865 MHz;
• in-ear monitoring equipment using either 300 kHz bandwidth analogue modulation or 300 kHz, 600 kHz,
1 200 kHz digital FDMA modulation in the range 863 MHz to 865 MHz;
• in-vehicle cordless;
• personal cordless;
• broadband multi channel audio systems;
• Band II LPD (low power devices) in the 87,5 MHz to 108 MHz range (Broadcasting Band II) using up to
200 kHz bandwidth and analogue modulation;
• and other devices and frequency bands defined within CEPT/ERC/REC 70-03 [i.2], European or National
regulation.
The frequency bands for this equipment may differ from country to country as specified in their national regulations.
All equipment is intended to be used with integral antennas.
Annex A provides normative specifications concerning radiated measurements.
Annex B provides the test configuration for the measurement of necessary bandwidth.
Annex C provides informative parameters on the receiver part, which are intended to give guidance to manufacturers.
Annex D provides information on the derivation of radiated emissions limits for Band II LPD.
Annex E provides a justification for field strength limits for Band II LPD.
Annex F provides details of a typical test layout for Band II LPD.
Annex G contains the Bibliography.
ETSI
9 Final draft ETSI EN 301 357-1 V1.4.1 (2008-09)
2 References
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.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ITU-R Recommendation BS.559-2 (1990): "Objective measurement of radio-frequency protection
ratios in LF, MF and HF broadcasting".
[2] IEC 60244-13 (1991): "Methods of measurement for radio transmitters - Part 13: Performance
characteristics for FM sound broadcasting".
[3] ETSI TR 102 273 (all parts) (2001): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Improvement on Radiated Methods of Measurement (using test site) and evaluation of the
corresponding measurement uncertainties".
[4] ANSI C63.5 (2006): "American National Standard for Calibration of Antennas Used for Radiated
Emission Measurements in Electro Magnetic Interference".
[5] IEC 60489-3 (1988): "Methods of measurement for radio equipment used in the mobile services.
Part 3: Receivers for A3E or F3E emissions".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[i.1] 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 (R&TTE Directive).
[i.2] CEPT/ERC/REC 70-03 relating to the use of Short Range Devices (SRD), annex 13.
ETSI
10 Final draft ETSI EN 301 357-1 V1.4.1 (2008-09)
[i.3] ETSI EN 300 220 (all parts): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Short Range Devices (SRD); Radio equipment to be used in the 25 MHz to 1 000 MHz frequency
range with power levels ranging up to 500 mW".
[i.4] ETSI EN 300 422: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Wireless
microphones in the 25 MHz to 3 GHz frequency range".
[i.5] ETSI EN 301 489-9: "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".
[i.6] ETSI EN 301 357-2: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Cordless audio devices in the range 25 MHz to 2 000 MHz; Part 2: Harmonized EN covering
essential requirements of article 3.2 of the R&TTE Directive".
[i.7] Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the
harmonization of the laws of Member States relating to electrical equipment designed for use
within certain voltage limits.
[i.8] Directive 2004/108/EC of the European Parliament and of the Council of 15 December 2004 on
the approximation of the laws of the Member States relating to electromagnetic compatibility and
repealing Directive 89/336/EEC (EMC Directive).
[i.9] Commission directive 2006/28/EC of 6 March 2006 amending, for the purposes of their adaptation
to technical progress, Council Directive 72/245/EEC of 20 June 1972 relating to the radio
interference (electromagnetic compatibility) of vehicles and Council Directive 70/156/EEC on the
approximation of the laws of the Member States relating to the type-approval of motor vehicles
and their trailers.
[i.10] ETSI EN 301 908-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Base
Stations (BS), Repeaters and User Equipment (UE) for IMT-2000 Third-Generation cellular
networks; Part 1: Harmonized EN for IMT-2000, introduction and common requirements,
covering essential requirements of article 3.2 of the R&TTE Directive".
[i.11] ETSI EN 301 511: "Global System for Mobile communications (GSM); Harmonized EN for
mobile stations in the GSM 900 and GSM 1800 bands covering essential requirements under
article 3.2 of the R&TTE directive (1999/5/EC)".
[i.12] ETSI TR 100 028: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics".
[i.13] ETSI TR 100 027: "ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Methods
of measurement for private mobile radio equipment".
[i.14] ETSI EN 301 489-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
ElectroMagnetic Compatibility (EMC) standard for radio equipment and services;
Part 1: Common technical requirements".
[i.15] CEPT/ECC Report 73: "Compatibility of SRD in the FM radio broadcasting band".
ETSI
11 Final draft ETSI EN 301 357-1 V1.4.1 (2008-09)
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
allocated or applicable band: frequency band as defined in radio regulations of national administrations
artificial antenna: tuned reduced-radiating dummy load equal to the nominal impedance specified by the applicant
channel bandwidth: frequency band of defined width including safety margin for operation on adjacent channels,
located symmetrically around the carrier frequency
cordless: link between at least two entities that does not require physical connection. While the term "cordless" can
refer to infra-red and other non-RF "wireless" links, in the context of the present document it is restricted to RF
operating systems only
integral antenna: antenna, with or without a connector, designed as, and declared as by the manufacturer, an
indispensable part of the equipment
integral antenna for Band II LPD only: permanent fixed antenna, which may be built-in, designed as an
indispensable part of the equipment
necessary bandwidth: for a given class of emission, the width of the frequency band which is just sufficient to ensure
the transmission of information at the rate and with the quality required under specified conditions
NOTE: However, the necessary bandwidths of most digital modulation formats are presently not referred to
ITU-R Recommendations of SM series.
nominal channel frequency: that declared by the manufacturer
occupied bandwidth: width of a frequency band such that, below the lower and above the upper frequency limits, the
mean powers emitted are each equal to a specified percentage β/2 of the total mean power of a given emission
NOTE: Unless otherwise specified in an ITU-R Recommendation for the appropriate class of
...

ETSI EN 301 357-1 V1.4.1 (2008-11)
European Standard (Telecommunications series)

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
2 ETSI EN 301 357-1 V1.4.1 (2008-11)

Reference
REN/ERM-TG17WG3-261-1
Keywords
audio, radio, radio MIC, testing
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

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 2008.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
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
3 ETSI EN 301 357-1 V1.4.1 (2008-11)
Contents
Intellectual Property Rights.7
Foreword.7
Introduction .7
1 Scope.8
2 References.9
2.1 Normative references.9
2.2 Informative references.9
3 Definitions, symbols and abbreviations .11
3.1 Definitions.11
3.2 Symbols.11
3.3 Abbreviations.12
4 Functional characteristics.12
4.1 Cordless audio.12
4.1.1 In-vehicle cordless.12
4.1.2 Personal cordless.12
4.1.3 Broadband multi channel systems .12
4.1.4 Band II LPD.13
4.2 Consumer radio microphones.13
4.3 In-ear monitoring.13
5 General.13
5.1 Presentation of equipment for testing purposes.13
5.1.1 Choice of model for performance testing .14
5.1.2 Definitions of alignment and switching ranges.14
5.1.3 Alignment Range.14
5.1.4 Choice of frequencies.14
5.1.4.1 Testing of single channel equipment.14
5.1.4.2 Testing of two channel equipment .14
5.1.4.3 Testing of multi-channel equipment (more than two channels) .14
5.1.5 Testing of equipment with an external frequency control.15
5.1.6 Testing of equipment with an integral antenna.15
5.1.6.1 Equipment with a permanent internal RF port .15
5.1.6.2 Equipment with a temporary RF port.15
5.2 Mechanical and electrical design.15
5.2.1 General.15
5.2.2 Controls.15
5.2.3 Integral antenna.15
5.2.4 Marking.16
5.3 Interpretation of the measurement results .16
6 Test conditions, power sources and ambient conditions .16
6.1 Normal and extreme test-conditions.16
6.2 Test power source.16
6.3 Normal test conditions.16
6.3.1 Normal temperature and humidity.17
6.3.2 Normal test power source voltage.17
6.3.2.1 Mains voltage.17
6.3.2.2 Nickel-cadmium cells.17
6.3.2.3 Other power sources.17
6.4 Extreme test conditions .17
6.4.1 Extreme temperatures.17
6.4.1.1 Procedures for tests at extreme temperatures .17
6.4.2 Extreme test power source voltages.18
6.4.2.1 Mains voltage.18
ETSI
4 ETSI EN 301 357-1 V1.4.1 (2008-11)
6.4.2.2 Re-chargeable battery power sources.18
6.4.2.3 Power sources using other types of batteries.18
6.4.2.4 Other power sources.18
7 General conditions.18
7.1 Normal test modulation.18
7.2 Test fixture.19
7.3 Test site and general arrangements for radiated measurements.20
7.4 Modes of operation of the transmitter .20
7.5 Arrangement for test signals at the input of the transmitter .20
8 Methods of measurement and limits for transmitter parameters .20
8.1 Basic requirements for Band II LPD .20
8.2 Methods of measurement and limits for transmitter parameters of Band II LPD.21
8.2.1 Test site and general arrangements for radiated measurements.21
8.2.2 Test modulation.21
8.2.3 Effective radiated power (e.r.p.) .22
8.2.3.1 Definition.22
8.2.3.2 Test procedure.22
8.2.3.3 Limits.22
8.2.3.4 Measurement uncertainty.22
8.2.4 Occupied bandwidth.22
8.2.4.1 Definition.22
8.2.4.2 Test procedure.23
8.2.4.3 Limits.23
8.2.4.4 Measurement uncertainty.23
8.2.5 Frequency error.23
8.2.5.1 Definition.23
8.2.5.2 Test procedure.23
8.2.5.3 Limits.24
8.2.5.4 Measurement uncertainty.24
8.2.6 Transmitter timeout.24
8.2.6.1 Definitions.24
8.2.6.2 Test procedure.24
8.2.6.3 Limits.25
8.2.6.4 Measurement uncertainty.25
8.2.7 Radiated spurious emissions.25
8.2.7.1 Definitions.25
8.2.7.2 Measurement procedure.25
8.2.7.3 Limits.25
8.2.7.3.1 Band II LPD .25
8.2.7.3.2 Combined equipments.25
8.2.7.4 Measurement uncertainty.25
8.3 Frequency error.26
8.3.1 Definition.26
8.3.2 Method of measurement.26
8.3.3 Limit.26
8.4 Carrier power.26
8.4.1 Definition.26
8.4.2 Method of measurement for equipment with integral antenna.26
8.4.2.1 Method of measurement under normal test conditions .26
8.4.2.2 Method of measurement under extreme test conditions.27
8.4.3 Limit.27
8.5 Channel bandwidth.28
8.5.1 Definition.28
8.5.2 Measurement of Necessary Bandwidth (BN) .28
8.5.3 Limits.28
8.5.4 Edge of Band Limits.28
8.6 Spurious emissions and cabinet radiation.29
8.6.1 Definitions.30
8.6.2 Method of measuring the effective radiated power.30
8.6.3 Limits.30
ETSI
5 ETSI EN 301 357-1 V1.4.1 (2008-11)
8.6.4 Measuring receiver.30
8.7 Cordless audio transmitter shutoff.31
8.7.1 Definition.31
8.7.2 Method of measurement.31
8.7.3 Limits.31
9 Receiver.31
9.1 Spurious emissions and cabinet radiation.31
9.1.1 Definitions.31
9.1.2 Method of measuring the power level in a specified load.31
9.1.3 Method of measuring the effective radiated power of the enclosure .32
9.1.4 Method of measuring the effective radiated power.32
9.1.5 Limits.32
10 Measurement uncertainty .33
10.1 Compliance assessment when measurement uncertainty is equal to or less than maximum acceptable
uncertainty.33
10.2 Compliance assessment when measurement uncertainty is greater than maximum acceptable uncertainty .33
10.3 Maximum allowable measurement uncertainties for cordless audio and radio microphones.33
10.4 Maximum allowable measurement uncertainties for Band II LPD .34
Annex A (normative): Radiated measurement.35
A.1 Test sites and general arrangements for measurements involving the use of radiated fields .35
A.1.1 Anechoic chamber.35
A.1.2 Anechoic chamber with a conductive ground plane.36
A.1.3 Open Area Test Site (OATS) .37
A.1.4 Test antenna.38
A.1.5 Substitution antenna.39
A.1.6 Measuring antenna.39
A.1.7 Stripline arrangement.39
A.1.7.1 General.39
A.1.7.2 Description.39
A.1.7.3 Calibration.39
A.1.7.4 Mode of use .39
A.2 Guidance on the use of radiation test sites .40
A.2.1 Verification of the test site .40
A.2.2 Preparation of the EUT.40
A.2.3 Power supplies to the EUT.40
A.2.4 Volume control setting for analogue speech tests .40
A.2.5 Range length.41
A.2.6 Site preparation.41
A.3 Coupling of signals.42
A.3.1 General.42
A.3.2 Data Signals.42
A.3.3 Speech and analogue signals .42
A.3.3.1 Acoustic coupler description.42
A.3.3.2 Calibration.43
A.4 Standard test position .43
A.5 Test fixture.43
A.5.1 Description.43
A.5.2 Calibration.44
A.5.3 Mode of use.45
Annex B (normative): Measurement of Necessary Bandwidth (BN) .46
Annex C (normative): Receiver parameters.47
C.1 Blocking or desensitization .47
C.1.1 Definition.47
C.1.2 Method of measurement.47
ETSI
6 ETSI EN 301 357-1 V1.4.1 (2008-11)
C.1.2.1 Measurement procedure.47
C.1.2.2 Definitions.47
C.1.2.3 Limits for applications below 1 GHz.48
C.1.2.4 Limits for applications above 1 GHz .48
C.2 Frequency mask for the receiver part.48
C.2.1 Definition.48
C.2.2 Method of measurement.48
C.2.3 Typical values for receivers.49
C.2.3.1 Typical values for receivers with analogue modulation.49
C.2.3.2 Typical values for receivers with digital modulation.49
Annex D (informative): Derivation of radiated spurious emissions limit for Band II LPD .50
Annex E (informative): Justifications for field strength measurement.51
Annex F (informative): Typical test layout.52
F.1 Use of vehicle power leads.52
Annex G (informative): Bibliography.53
History .54

ETSI
7 ETSI EN 301 357-1 V1.4.1 (2008-11)
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 European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM).
Consumer audio equipment intended for audio and voice operating below 50 MHz and using narrow band modulation
are considered and tested according to EN 300 220 [i.3]. Consumer radio microphones and in ear monitoring equipment
may be tested to either EN 300 422 [i.4] for equipment with maximum occupied bandwidth < 200 kHz or to the present
document for equipment with maximum occupied bandwidth > 200 kHz with due consideration of power and operating
frequency.
Electromagnetic Compatibility (EMC) requirements are covered by EN 301 489-9 [i.5].
The present document is part 1 of a multi-part deliverable covering cordless audio devices in the range 25 MHz to
2 000 MHz; as identified below:
Part 1: "Technical characteristics and test methods";
Part 2: "Harmonized EN covering essential requirements of article 3.2 of the R&TTE Directive".

National transposition dates
Date of adoption of this EN: 10 November 2008
Date of latest announcement of this EN (doa): 28 February 2009
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 August 2009
Date of withdrawal of any conflicting National Standard (dow): 31 August 2009

Introduction
In preparing the present document, attention has been given to assure a low interference probability, while at the same
time allowing a maximum flexibility and service to the end-user.
The harmonized standard EN 301 357-2 [i.6] provides the necessary parameters for equipment to obtain presumption of
conformity with article 3.2 of the R&TTE Directive [i.1]. Common technical specifications and harmonized frequency
allocations are expected to reduce the present problems of interference and illegal use.
The present document may be used for conformity testing based on spectrum utilization parameters and does not
include performance characteristics that may be required by the user or requirements for interfacing equipment.
If you are planning to use RDS please go to: http://www.rds.org.uk/rds98/rds98.htm for further information.
ETSI
8 ETSI EN 301 357-1 V1.4.1 (2008-11)
1 Scope
The present document covers the minimum characteristics for cordless audio devices considered necessary in order to
make the best use of the available frequencies. It does not necessarily include all the characteristics that may be required
by a user, nor does it necessarily represent the optimum performance achievable.
Cordless audio devices covered within the present document are considered, by definition, Short Range Devices (SRD),
the power limits for different frequency bands can be found in the current version of CEPT/ERC/REC 70-03 [i.2],
annex 13 (or European or national regulations).
Stereo equipment can be designed for required channel bandwidths of 200 kHz or less, however consumer wideband
(multi channel) audio equipment and stereo equipment using e.g. Zenith-GE pilot tone systems or digital modulation
may need wider bandwidths as defined in the present document.
The present document is intended to specify the minimum performance and the methods of measurement of cordless
audio equipment in the range 25 MHz to 2 000 MHz, including:
• cordless headphones;
• cordless loudspeakers;
• consumer radio microphones in the range 863 MHz to 865 MHz;
• in-ear monitoring equipment using either 300 kHz bandwidth analogue modulation or 300 kHz, 600 kHz,
1 200 kHz digital FDMA modulation in the range 863 MHz to 865 MHz;
• in-vehicle cordless;
• personal cordless;
• broadband multi channel audio systems;
• Band II LPD (low power devices) in the 87,5 MHz to 108 MHz range (Broadcasting Band II) using up to
200 kHz bandwidth and analogue modulation;
• and other devices and frequency bands defined within CEPT/ERC/REC 70-03 [i.2], European or National
regulation.
The frequency bands for this equipment may differ from country to country as specified in their national regulations.
All equipment is intended to be used with integral antennas.
Annex A provides normative specifications concerning radiated measurements.
Annex B provides the test configuration for the measurement of necessary bandwidth.
Annex C provides informative parameters on the receiver part, which are intended to give guidance to manufacturers.
Annex D provides information on the derivation of radiated emissions limits for Band II LPD.
Annex E provides a justification for field strength limits for Band II LPD.
Annex F provides details of a typical test layout for Band II LPD.
Annex G contains the Bibliography.
ETSI
9 ETSI EN 301 357-1 V1.4.1 (2008-11)
2 References
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.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ITU-R Recommendation BS.559-2 (1990): "Objective measurement of radio-frequency protection
ratios in LF, MF and HF broadcasting".
[2] IEC 60244-13 (1991): "Methods of measurement for radio transmitters - Part 13: Performance
characteristics for FM sound broadcasting".
[3] ETSI TR 102 273 (all parts) (2001): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Improvement on Radiated Methods of Measurement (using test site) and evaluation of the
corresponding measurement uncertainties".
[4] ANSI C63.5 (2006): "American National Standard for Calibration of Antennas Used for Radiated
Emission Measurements in Electro Magnetic Interference".
[5] IEC 60489-3 (1988): "Methods of measurement for radio equipment used in the mobile services.
Part 3: Receivers for A3E or F3E emissions".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[i.1] 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 (R&TTE Directive).
[i.2] CEPT/ERC/REC 70-03 relating to the use of Short Range Devices (SRD), annex 13.
ETSI
10 ETSI EN 301 357-1 V1.4.1 (2008-11)
[i.3] ETSI EN 300 220 (all parts): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Short Range Devices (SRD); Radio equipment to be used in the 25 MHz to 1 000 MHz frequency
range with power levels ranging up to 500 mW".
[i.4] ETSI EN 300 422: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Wireless
microphones in the 25 MHz to 3 GHz frequency range".
[i.5] ETSI EN 301 489-9: "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".
[i.6] ETSI EN 301 357-2: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Cordless audio devices in the range 25 MHz to 2 000 MHz; Part 2: Harmonized EN covering
essential requirements of article 3.2 of the R&TTE Directive".
[i.7] Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the
harmonization of the laws of Member States relating to electrical equipment designed for use
within certain voltage limits.
[i.8] Directive 2004/108/EC of the European Parliament and of the Council of 15 December 2004 on
the approximation of the laws of the Member States relating to electromagnetic compatibility and
repealing Directive 89/336/EEC (EMC Directive).
[i.9] Commission directive 2006/28/EC of 6 March 2006 amending, for the purposes of their adaptation
to technical progress, Council Directive 72/245/EEC of 20 June 1972 relating to the radio
interference (electromagnetic compatibility) of vehicles and Council Directive 70/156/EEC on the
approximation of the laws of the Member States relating to the type-approval of motor vehicles
and their trailers.
[i.10] ETSI EN 301 908-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Base
Stations (BS), Repeaters and User Equipment (UE) for IMT-2000 Third-Generation cellular
networks; Part 1: Harmonized EN for IMT-2000, introduction and common requirements,
covering essential requirements of article 3.2 of the R&TTE Directive".
[i.11] ETSI EN 301 511: "Global System for Mobile communications (GSM); Harmonized EN for
mobile stations in the GSM 900 and GSM 1800 bands covering essential requirements under
article 3.2 of the R&TTE directive (1999/5/EC)".
[i.12] ETSI TR 100 028: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics".
[i.13] ETSI TR 100 027: "ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Methods
of measurement for private mobile radio equipment".
[i.14] ETSI EN 301 489-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 1:
Common technical requirements".
[i.15] CEPT/ECC Report 73: "Compatibility of SRD in the FM radio broadcasting band".
ETSI
11 ETSI EN 301 357-1 V1.4.1 (2008-11)
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
allocated or applicable band: frequency band as defined in radio regulations of national administrations
artificial antenna: tuned reduced-radiating dummy load equal to the nominal impedance specified by the applicant
channel bandwidth: frequency band of defined width including safety margin for operation on adjacent channels,
located symmetrically around the carrier frequency
cordless: link between at least two entities that does not require physical connection. While the term "cordless" can
refer to infra-red and other non-RF "wireless" links, in the context of the present document it is restricted to RF
operating systems only
integral antenna: antenna, with or without a connector, designed as, and declared as by the manufacturer, an
indispensable part of the equipment
integral antenna for Band II LPD only: permanent fixed antenna, which may be built-in, designed as an
indispensable part of the equipment
necessary bandwidth: for a given class of emission, the width of the frequency band which is just sufficient to ensure
the transmission of information at the rate and with the quality required under specified conditions
NOTE: However, the necessary bandwidths of most digital modulation formats are presently not referred to
ITU-R Recommendations of SM series.
nominal channel frequency: that declared by the manufacturer
occupied bandwidth: width of a frequency band such that, below the lower and above the upper frequency limits, the
mean powers emitted are each equal to a specified percentage β/2 of the total mean power of a given emission
NOTE: Unless otherwise specified in an ITU-R Recommendation for the appropriate class of emission, the value
of β/2 should be taken as 0,5 %.
port: any connection point on or within the Equipment Under Test (EUT) intended for the connection of cables to or
from that equipment
radiated measure
...

SLOVENSKI STANDARD
01-marec-2009
(OHNWURPDJQHWQD]GUXåOMLYRVWLQ]DGHYHY]YH]L]UDGLMVNLPVSHNWURP(50
%UH]YUYLþQHDYGLRQDSUDYH]DIUHNYHQþQRREPRþMHRG0+]GR0+]GHO
7HKQLþQHNDUDNWHULVWLNHLQSUHVNXVQHPHWRGH
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
Ta slovenski standard je istoveten z: EN 301 357-1 Version 1.4.1
ICS:
33.060.99 Druga oprema za radijske Other equipment for
komunikacije radiocommunications
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

ETSI EN 301 357-1 V1.4.1 (2008-11)
European Standard (Telecommunications series)

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
2 ETSI EN 301 357-1 V1.4.1 (2008-11)

Reference
REN/ERM-TG17WG3-261-1
Keywords
audio, radio, radio MIC, testing
ETSI
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© European Telecommunications Standards Institute 2008.
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ETSI
3 ETSI EN 301 357-1 V1.4.1 (2008-11)
Contents
Intellectual Property Rights.7
Foreword.7
Introduction .7
1 Scope.8
2 References.9
2.1 Normative references.9
2.2 Informative references.9
3 Definitions, symbols and abbreviations .11
3.1 Definitions.11
3.2 Symbols.11
3.3 Abbreviations.12
4 Functional characteristics.12
4.1 Cordless audio.12
4.1.1 In-vehicle cordless.12
4.1.2 Personal cordless.12
4.1.3 Broadband multi channel systems .12
4.1.4 Band II LPD.13
4.2 Consumer radio microphones.13
4.3 In-ear monitoring.13
5 General.13
5.1 Presentation of equipment for testing purposes.13
5.1.1 Choice of model for performance testing .14
5.1.2 Definitions of alignment and switching ranges.14
5.1.3 Alignment Range.14
5.1.4 Choice of frequencies.14
5.1.4.1 Testing of single channel equipment.14
5.1.4.2 Testing of two channel equipment .14
5.1.4.3 Testing of multi-channel equipment (more than two channels) .14
5.1.5 Testing of equipment with an external frequency control.15
5.1.6 Testing of equipment with an integral antenna.15
5.1.6.1 Equipment with a permanent internal RF port .15
5.1.6.2 Equipment with a temporary RF port.15
5.2 Mechanical and electrical design.15
5.2.1 General.15
5.2.2 Controls.15
5.2.3 Integral antenna.15
5.2.4 Marking.16
5.3 Interpretation of the measurement results .16
6 Test conditions, power sources and ambient conditions .16
6.1 Normal and extreme test-conditions.16
6.2 Test power source.16
6.3 Normal test conditions.16
6.3.1 Normal temperature and humidity.17
6.3.2 Normal test power source voltage.17
6.3.2.1 Mains voltage.17
6.3.2.2 Nickel-cadmium cells.17
6.3.2.3 Other power sources.17
6.4 Extreme test conditions .17
6.4.1 Extreme temperatures.17
6.4.1.1 Procedures for tests at extreme temperatures .17
6.4.2 Extreme test power source voltages.18
6.4.2.1 Mains voltage.18
ETSI
4 ETSI EN 301 357-1 V1.4.1 (2008-11)
6.4.2.2 Re-chargeable battery power sources.18
6.4.2.3 Power sources using other types of batteries.18
6.4.2.4 Other power sources.18
7 General conditions.18
7.1 Normal test modulation.18
7.2 Test fixture.19
7.3 Test site and general arrangements for radiated measurements.20
7.4 Modes of operation of the transmitter .20
7.5 Arrangement for test signals at the input of the transmitter .20
8 Methods of measurement and limits for transmitter parameters .20
8.1 Basic requirements for Band II LPD .20
8.2 Methods of measurement and limits for transmitter parameters of Band II LPD.21
8.2.1 Test site and general arrangements for radiated measurements.21
8.2.2 Test modulation.21
8.2.3 Effective radiated power (e.r.p.) .22
8.2.3.1 Definition.22
8.2.3.2 Test procedure.22
8.2.3.3 Limits.22
8.2.3.4 Measurement uncertainty.22
8.2.4 Occupied bandwidth.22
8.2.4.1 Definition.22
8.2.4.2 Test procedure.23
8.2.4.3 Limits.23
8.2.4.4 Measurement uncertainty.23
8.2.5 Frequency error.23
8.2.5.1 Definition.23
8.2.5.2 Test procedure.23
8.2.5.3 Limits.24
8.2.5.4 Measurement uncertainty.24
8.2.6 Transmitter timeout.24
8.2.6.1 Definitions.24
8.2.6.2 Test procedure.24
8.2.6.3 Limits.25
8.2.6.4 Measurement uncertainty.25
8.2.7 Radiated spurious emissions.25
8.2.7.1 Definitions.25
8.2.7.2 Measurement procedure.25
8.2.7.3 Limits.25
8.2.7.3.1 Band II LPD .25
8.2.7.3.2 Combined equipments.25
8.2.7.4 Measurement uncertainty.25
8.3 Frequency error.26
8.3.1 Definition.26
8.3.2 Method of measurement.26
8.3.3 Limit.26
8.4 Carrier power.26
8.4.1 Definition.26
8.4.2 Method of measurement for equipment with integral antenna.26
8.4.2.1 Method of measurement under normal test conditions .26
8.4.2.2 Method of measurement under extreme test conditions.27
8.4.3 Limit.27
8.5 Channel bandwidth.28
8.5.1 Definition.28
8.5.2 Measurement of Necessary Bandwidth (BN) .28
8.5.3 Limits.28
8.5.4 Edge of Band Limits.28
8.6 Spurious emissions and cabinet radiation.29
8.6.1 Definitions.30
8.6.2 Method of measuring the effective radiated power.30
8.6.3 Limits.30
ETSI
5 ETSI EN 301 357-1 V1.4.1 (2008-11)
8.6.4 Measuring receiver.30
8.7 Cordless audio transmitter shutoff.31
8.7.1 Definition.31
8.7.2 Method of measurement.31
8.7.3 Limits.31
9 Receiver.31
9.1 Spurious emissions and cabinet radiation.31
9.1.1 Definitions.31
9.1.2 Method of measuring the power level in a specified load.31
9.1.3 Method of measuring the effective radiated power of the enclosure .32
9.1.4 Method of measuring the effective radiated power.32
9.1.5 Limits.32
10 Measurement uncertainty .33
10.1 Compliance assessment when measurement uncertainty is equal to or less than maximum acceptable
uncertainty.33
10.2 Compliance assessment when measurement uncertainty is greater than maximum acceptable uncertainty .33
10.3 Maximum allowable measurement uncertainties for cordless audio and radio microphones.33
10.4 Maximum allowable measurement uncertainties for Band II LPD .34
Annex A (normative): Radiated measurement.35
A.1 Test sites and general arrangements for measurements involving the use of radiated fields .35
A.1.1 Anechoic chamber.35
A.1.2 Anechoic chamber with a conductive ground plane.36
A.1.3 Open Area Test Site (OATS) .37
A.1.4 Test antenna.38
A.1.5 Substitution antenna.39
A.1.6 Measuring antenna.39
A.1.7 Stripline arrangement.39
A.1.7.1 General.39
A.1.7.2 Description.39
A.1.7.3 Calibration.39
A.1.7.4 Mode of use .39
A.2 Guidance on the use of radiation test sites .40
A.2.1 Verification of the test site .40
A.2.2 Preparation of the EUT.40
A.2.3 Power supplies to the EUT.40
A.2.4 Volume control setting for analogue speech tests .40
A.2.5 Range length.41
A.2.6 Site preparation.41
A.3 Coupling of signals.42
A.3.1 General.42
A.3.2 Data Signals.42
A.3.3 Speech and analogue signals .42
A.3.3.1 Acoustic coupler description.42
A.3.3.2 Calibration.43
A.4 Standard test position .43
A.5 Test fixture.43
A.5.1 Description.43
A.5.2 Calibration.44
A.5.3 Mode of use.45
Annex B (normative): Measurement of Necessary Bandwidth (BN) .46
Annex C (normative): Receiver parameters.47
C.1 Blocking or desensitization .47
C.1.1 Definition.47
C.1.2 Method of measurement.47
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6 ETSI EN 301 357-1 V1.4.1 (2008-11)
C.1.2.1 Measurement procedure.47
C.1.2.2 Definitions.47
C.1.2.3 Limits for applications below 1 GHz.48
C.1.2.4 Limits for applications above 1 GHz .48
C.2 Frequency mask for the receiver part.48
C.2.1 Definition.48
C.2.2 Method of measurement.48
C.2.3 Typical values for receivers.49
C.2.3.1 Typical values for receivers with analogue modulation.49
C.2.3.2 Typical values for receivers with digital modulation.49
Annex D (informative): Derivation of radiated spurious emissions limit for Band II LPD .50
Annex E (informative): Justifications for field strength measurement.51
Annex F (informative): Typical test layout.52
F.1 Use of vehicle power leads.52
Annex G (informative): Bibliography.53
History .54

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7 ETSI EN 301 357-1 V1.4.1 (2008-11)
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 European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM).
Consumer audio equipment intended for audio and voice operating below 50 MHz and using narrow band modulation
are considered and tested according to EN 300 220 [i.3]. Consumer radio microphones and in ear monitoring equipment
may be tested to either EN 300 422 [i.4] for equipment with maximum occupied bandwidth < 200 kHz or to the present
document for equipment with maximum occupied bandwidth > 200 kHz with due consideration of power and operating
frequency.
Electromagnetic Compatibility (EMC) requirements are covered by EN 301 489-9 [i.5].
The present document is part 1 of a multi-part deliverable covering cordless audio devices in the range 25 MHz to
2 000 MHz; as identified below:
Part 1: "Technical characteristics and test methods";
Part 2: "Harmonized EN covering essential requirements of article 3.2 of the R&TTE Directive".

National transposition dates
Date of adoption of this EN: 10 November 2008
Date of latest announcement of this EN (doa): 28 February 2009
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 August 2009
Date of withdrawal of any conflicting National Standard (dow): 31 August 2009

Introduction
In preparing the present document, attention has been given to assure a low interference probability, while at the same
time allowing a maximum flexibility and service to the end-user.
The harmonized standard EN 301 357-2 [i.6] provides the necessary parameters for equipment to obtain presumption of
conformity with article 3.2 of the R&TTE Directive [i.1]. Common technical specifications and harmonized frequency
allocations are expected to reduce the present problems of interference and illegal use.
The present document may be used for conformity testing based on spectrum utilization parameters and does not
include performance characteristics that may be required by the user or requirements for interfacing equipment.
If you are planning to use RDS please go to: http://www.rds.org.uk/rds98/rds98.htm for further information.
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8 ETSI EN 301 357-1 V1.4.1 (2008-11)
1 Scope
The present document covers the minimum characteristics for cordless audio devices considered necessary in order to
make the best use of the available frequencies. It does not necessarily include all the characteristics that may be required
by a user, nor does it necessarily represent the optimum performance achievable.
Cordless audio devices covered within the present document are considered, by definition, Short Range Devices (SRD),
the power limits for different frequency bands can be found in the current version of CEPT/ERC/REC 70-03 [i.2],
annex 13 (or European or national regulations).
Stereo equipment can be designed for required channel bandwidths of 200 kHz or less, however consumer wideband
(multi channel) audio equipment and stereo equipment using e.g. Zenith-GE pilot tone systems or digital modulation
may need wider bandwidths as defined in the present document.
The present document is intended to specify the minimum performance and the methods of measurement of cordless
audio equipment in the range 25 MHz to 2 000 MHz, including:
• cordless headphones;
• cordless loudspeakers;
• consumer radio microphones in the range 863 MHz to 865 MHz;
• in-ear monitoring equipment using either 300 kHz bandwidth analogue modulation or 300 kHz, 600 kHz,
1 200 kHz digital FDMA modulation in the range 863 MHz to 865 MHz;
• in-vehicle cordless;
• personal cordless;
• broadband multi channel audio systems;
• Band II LPD (low power devices) in the 87,5 MHz to 108 MHz range (Broadcasting Band II) using up to
200 kHz bandwidth and analogue modulation;
• and other devices and frequency bands defined within CEPT/ERC/REC 70-03 [i.2], European or National
regulation.
The frequency bands for this equipment may differ from country to country as specified in their national regulations.
All equipment is intended to be used with integral antennas.
Annex A provides normative specifications concerning radiated measurements.
Annex B provides the test configuration for the measurement of necessary bandwidth.
Annex C provides informative parameters on the receiver part, which are intended to give guidance to manufacturers.
Annex D provides information on the derivation of radiated emissions limits for Band II LPD.
Annex E provides a justification for field strength limits for Band II LPD.
Annex F provides details of a typical test layout for Band II LPD.
Annex G contains the Bibliography.
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9 ETSI EN 301 357-1 V1.4.1 (2008-11)
2 References
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.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ITU-R Recommendation BS.559-2 (1990): "Objective measurement of radio-frequency protection
ratios in LF, MF and HF broadcasting".
[2] IEC 60244-13 (1991): "Methods of measurement for radio transmitters - Part 13: Performance
characteristics for FM sound broadcasting".
[3] ETSI TR 102 273 (all parts) (2001): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Improvement on Radiated Methods of Measurement (using test site) and evaluation of the
corresponding measurement uncertainties".
[4] ANSI C63.5 (2006): "American National Standard for Calibration of Antennas Used for Radiated
Emission Measurements in Electro Magnetic Interference".
[5] IEC 60489-3 (1988): "Methods of measurement for radio equipment used in the mobile services.
Part 3: Receivers for A3E or F3E emissions".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[i.1] 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 (R&TTE Directive).
[i.2] CEPT/ERC/REC 70-03 relating to the use of Short Range Devices (SRD), annex 13.
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10 ETSI EN 301 357-1 V1.4.1 (2008-11)
[i.3] ETSI EN 300 220 (all parts): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Short Range Devices (SRD); Radio equipment to be used in the 25 MHz to 1 000 MHz frequency
range with power levels ranging up to 500 mW".
[i.4] ETSI EN 300 422: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Wireless
microphones in the 25 MHz to 3 GHz frequency range".
[i.5] ETSI EN 301 489-9: "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".
[i.6] ETSI EN 301 357-2: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Cordless audio devices in the range 25 MHz to 2 000 MHz; Part 2: Harmonized EN covering
essential requirements of article 3.2 of the R&TTE Directive".
[i.7] Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the
harmonization of the laws of Member States relating to electrical equipment designed for use
within certain voltage limits.
[i.8] Directive 2004/108/EC of the European Parliament and of the Council of 15 December 2004 on
the approximation of the laws of the Member States relating to electromagnetic compatibility and
repealing Directive 89/336/EEC (EMC Directive).
[i.9] Commission directive 2006/28/EC of 6 March 2006 amending, for the purposes of their adaptation
to technical progress, Council Directive 72/245/EEC of 20 June 1972 relating to the radio
interference (electromagnetic compatibility) of vehicles and Council Directive 70/156/EEC on the
approximation of the laws of the Member States relating to the type-approval of motor vehicles
and their trailers.
[i.10] ETSI EN 301 908-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Base
Stations (BS), Repeaters and User Equipment (UE) for IMT-2000 Third-Generation cellular
networks; Part 1: Harmonized EN for IMT-2000, introduction and common requirements,
covering essential requirements of article 3.2 of the R&TTE Directive".
[i.11] ETSI EN 301 511: "Global System for Mobile communications (GSM); Harmonized EN for
mobile stations in the GSM 900 and GSM 1800 bands covering essential requirements under
article 3.2 of the R&TTE directive (1999/5/EC)".
[i.12] ETSI TR 100 028: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics".
[i.13] ETSI TR 100 027: "ElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Methods
of measurement for private mobile radio equipment".
[i.14] ETSI EN 301 489-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 1:
Common technical requirements".
[i.15] CEPT/ECC Report 73: "Compatibility of SRD in the FM radio broadcasting band".
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11 ETSI EN 301 357-1 V1.4.1 (2008-11)
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
allocated or applicable band: frequency band as defined in radio regulations of national administrations
artificial antenna: tuned reduced-radiating dummy load equal to the nominal impedance specified by the applicant
channel bandwidth: frequency band of defined width including safety margin for operation on adjacent channels,
located symmetrically around the carrier frequency
cordless: link between at least two entities that does not require physical connection. While the term "cordless" can
refer to infra-red and
...