ETSI EN 302 571 V2.1 · 7 ETSI EN 302 571 V2.1.1 (2017-02) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI

ETSI EN 302 571 V2.1.1 (2017-02)

Intelligent Transport Systems (ITS); Radiocommunications equipment operating

in the 5 855 MHz to 5 925 MHz frequency band; Harmonized ENHarmonised Standard covering the essential

requirements

of article 3.2 of the R&TTE Directive 2014/53/EU

HARMONISED EUROPEAN STANDARD

ETSI

ETSI EN 302 571 V2.1.1 (2017-02) 2

Reference

REN/ERM-TG37-009024

Keywords

CALMharmonised standard, ITS, radio, regulation, transport

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ETSI EN 302 571 V2.1.1 (2017-02) 3

Contents

Intellectual Property Rights ................................................................................................................................ 7

Foreword............................................................................................................................................................. 7

Modal verbs terminology ................................................................................................................................... 7

1 Scope ...................................................................................................................................................... 98

2 References .............................................................................................................................................. 98 2.1 Normative references ....................................................................................................................................... 98 2.2 Informative references ................................................................................................................................... 109

3 Definitions, symbols and abbreviations ............................................................................................. 1210 3.1 Definitions ................................................................................................................................................... 1210 3.2 Symbols ....................................................................................................................................................... 1310 3.3 Abbreviations ............................................................................................................................................... 1311

4 Technical requirements specifications ............................................................................................... 1411 4.1 Environmental profile .................................................................................................................................. 1911 4.2 Conformance requirements .......................................................................................................................... 1912 4.2.1 Transmitter frequency stability .............................................................................................................. 1912 4.2.1.1 Definition .......................................................................................................................................... 1912 4.2.1.2 Limits................................................................................................................................................ 2012 4.2.1.3 Conformance .................................................................................................................................... 2012 4.2.2 RF output power ..................................................................................................................................... 2013 4.2.2.1 Definition .......................................................................................................................................... 2013 4.2.2.2 Limits................................................................................................................................................ 2113 4.2.2.3 Conformance .................................................................................................................................... 2113 4.2.3 Power spectral density ............................................................................................................................ 2113 4.2.3.1 Definition .......................................................................................................................................... 2113 4.2.3.2 Limits................................................................................................................................................ 2113 4.2.3.3 Conformance .................................................................................................................................... 2113 4.2.4 Transmit power control .......................................................................................................................... 2213 4.2.4.1 Definition .......................................................................................................................................... 2213 4.2.4.2 Limits................................................................................................................................................ 2213 4.2.4.3 Conformance .................................................................................................................................... 2213 4.2.5 Transmitter unwanted emissions ............................................................................................................ 2213 4.2.5.1 Transmitter unwanted emissions outside the 5 GHz ITS frequency band ........................................ 2213 4.2.5.1.1 Definition .................................................................................................................................... 2213 4.2.5.1.2 Limits .......................................................................................................................................... 2214 4.2.5.1.3 Conformance ............................................................................................................................... 2314 4.2.5.2 Transmitter spectrum mask within the 5 GHz ITS frequency band for 10 MHz channels ............... 2315 4.2.5.2.1 Definition .................................................................................................................................... 2315 4.2.5.2.2 Limits .......................................................................................................................................... 2415 4.2.5.2.3 Conformance ............................................................................................................................... 2415 4.2.6 Receiver spurious emissions .................................................................................................................. 2415 4.2.6.1 Definition .......................................................................................................................................... 2415 4.2.6.2 Limits................................................................................................................................................ 2415 4.2.6.3 Conformance .................................................................................................................................... 2415 4.2.7 Receiver selectivity ................................................................................................................................ 2516 4.2.7.1 Definition .......................................................................................................................................... 2516 4.2.7.2 Limits................................................................................................................................................ 2616 4.2.7.3 Conformance .................................................................................................................................... 2716 4.2.8 Receiver sensitivity ................................................................................................................................ 2716 4.2.8.1 Definition .......................................................................................................................................... 2716 4.2.8.2 Limits................................................................................................................................................ 2717 4.2.8.3 Conformance .................................................................................................................................... 2717 4.2.9 Interference mitigation for CEN DSRC and HDR DSRC in the frequency band 5 795 MHz to 5 815

MHz ....................................................................................................................................................... 2817 4.2.9.1 Definition .......................................................................................................................................... 2817

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ETSI EN 302 571 V2.1.1 (2017-02) 4

4.2.9.2 Limits................................................................................................................................................ 2817 4.2.9.3 Conformance .................................................................................................................................... 2817 4.2.10 Decentralized congestion control ........................................................................................................... 2818 4.2.10.1 Definition .......................................................................................................................................... 2818 4.2.10.2 Limits................................................................................................................................................ 2918 4.2.10.3 Conformance .................................................................................................................................... 2918

5 Testing for compliance with technical requirements.......................................................................... 2919 5.1 Environmental conditions for testing ........................................................................................................... 2919 5.2 Interpretation of measurement results .......................................................................................................... 3019 5.3 Radio test suites ........................................................................................................................................... 3119 5.3.1 Product information ............................................................................................................................... 3119 5.3.2 Transmitter frequency stability .............................................................................................................. 3120 5.3.2.1 Test purpose...................................................................................................................................... 3120 5.3.2.2 Test applicability .............................................................................................................................. 3120 5.3.2.3 Test description ................................................................................................................................ 3120 5.3.2.3.1 Initial conditions ......................................................................................................................... 3220 5.3.2.3.2 Conducted measurement ............................................................................................................. 3220 5.3.2.3.3 Radiated measurement ................................................................................................................ 3321 5.3.2.4 Test requirements ............................................................................................................................. 3321 5.3.3 RF output power, power spectral density and transmit power control ................................................... 3321 5.3.3.1 Test purpose...................................................................................................................................... 3321 5.3.3.2 Test applicability .............................................................................................................................. 3421 5.3.3.3 Test description ................................................................................................................................ 3421 5.3.3.3.1 Initial conditions ......................................................................................................................... 3421 5.3.3.3.2 Conducted measurement ............................................................................................................. 3421 5.3.3.3.3 Radiated measurement ................................................................................................................ 3723 5.3.3.4 Test requirements ............................................................................................................................. 3823 5.3.4 Transmitter unwanted emissions outside the 5 GHz ITS frequency band .............................................. 3824 5.3.4.1 Test purpose...................................................................................................................................... 3824 5.3.4.2 Test applicability .............................................................................................................................. 3824 5.3.4.3 Test description ................................................................................................................................ 3824 5.3.4.3.1 Initial conditions ......................................................................................................................... 3824 5.3.4.3.2 Conducted measurement ............................................................................................................. 3824 5.3.4.3.3 Radiated measurement ................................................................................................................ 3925 5.3.4.4 Test requirements ............................................................................................................................. 4025 5.3.5 Transmitter spectrum mask within the 5 GHz ITS frequency band for 10 MHz channel spacing ......... 4025 5.3.5.1 Test Purpose ..................................................................................................................................... 4025 5.3.5.2 Test applicability .............................................................................................................................. 4025 5.3.5.3 Test description ................................................................................................................................ 4126 5.3.5.3.1 Initial conditions ......................................................................................................................... 4126 5.3.5.3.2 Conducted measurement ............................................................................................................. 4126 5.3.5.3.3 Radiated measurement ................................................................................................................ 4126 5.3.5.4 Test requirements ............................................................................................................................. 4226 5.3.6 Receiver spurious emissions .................................................................................................................. 4227 5.3.6.1 Test Purpose ..................................................................................................................................... 4227 5.3.6.2 Test applicability .............................................................................................................................. 4227 5.3.6.3 Test description ................................................................................................................................ 4227 5.3.6.3.1 Initial conditions ......................................................................................................................... 4227 5.3.6.3.2 Conducted measurement ............................................................................................................. 4227 5.3.6.3.3 Radiated measurement ................................................................................................................ 4328 5.3.6.4 Test requirement ............................................................................................................................... 4428 5.3.7 Receiver selectivity ................................................................................................................................ 4528 5.3.7.1 Test purpose...................................................................................................................................... 4528 5.3.7.2 Test applicability .............................................................................................................................. 4528 5.3.7.3 Test description ................................................................................................................................ 4528 5.3.7.3.1 Initial conditions ......................................................................................................................... 4528 5.3.7.3.2 Conducted measurement ............................................................................................................. 4529 5.3.7.3.3 Radiated measurement ................................................................................................................ 4829 5.3.7.4 Test requirement ............................................................................................................................... 4830 5.3.8 Receiver sensitivity ................................................................................................................................ 4930 5.3.8.1 Test purpose...................................................................................................................................... 4930

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ETSI EN 302 571 V2.1.1 (2017-02) 5

5.3.8.2 Test applicability .............................................................................................................................. 4930 5.3.8.3 Test description ................................................................................................................................ 4930 5.3.8.3.1 Initial conditions ......................................................................................................................... 4930 5.3.8.3.2 Conducted measurement ............................................................................................................. 4930 5.3.8.3.3 Radiated measurement ................................................................................................................ 5031 5.3.8.4 Test requirement ............................................................................................................................... 5131 5.3.9 CEN DSRC and HDR DSRC protection ................................................................................................ 5231 5.3.9.1 Test Purpose ..................................................................................................................................... 5231 5.3.9.2 Test applicability .............................................................................................................................. 5231 5.3.9.3 Test description ................................................................................................................................ 5231 5.3.9.3.1 Initial conditions ......................................................................................................................... 5231 5.3.9.3.2 Measurement of RF output power, unwanted emissions, and transmit duty cycle in

coexistence mode ........................................................................................................................ 5331 5.3.9.4 Test requirements ............................................................................................................................. 5332 5.3.10 CEN DSRC and HDR DSRC detection ................................................................................................. 5332 5.3.10.1 Test Purpose ..................................................................................................................................... 5332 5.3.10.2 Initial conditions ............................................................................................................................... 5332 5.3.10.3 Test of detecting CEN DSRC and HDR DSRC transmissions ......................................................... 5432 5.3.10.3.1 Test purpose ................................................................................................................................ 5432 5.3.10.3.2 Test applicability ......................................................................................................................... 5432 5.3.10.3.3 Test description ........................................................................................................................... 5432 5.3.10.3.4 Test requirements ........................................................................................................................ 5534 5.3.11 Decentralized congestion control ........................................................................................................... 5534 5.3.11.1 Test purpose...................................................................................................................................... 5534 5.3.11.2 Test applicability .............................................................................................................................. 5534 5.3.11.3 Test description ................................................................................................................................ 5534 5.3.11.3.1 Initial conditions ......................................................................................................................... 5534 5.3.11.3.2 Conducted measurement ............................................................................................................. 5634 5.3.11.3.3 Radiated measurement ................................................................................................................ 5635 5.3.11.4 Test requirement ............................................................................................................................... 5635

Annex A (informative): Relationship between the present document and the essential

requirements of Directive 2014/53/EU ..................................................... 5736

Annex B (normative): Test sites and arrangements for radiated measurements ...................... 5937

B.1 Test sites ............................................................................................................................................. 5937 B.1.1 Open air test sites ......................................................................................................................................... 5937 B.1.2 Anechoic chamber ....................................................................................................................................... 6038 B.1.2.1 General ................................................................................................................................................... 6038 B.1.2.2 Description ............................................................................................................................................. 6038 B.1.2.3 Influence of parasitic reflections ............................................................................................................ 6038 B.1.2.4 Calibration and mode of use ................................................................................................................... 6038

B.2 Test antenna ....................................................................................................................................... 6139

B.3 Substitution antenna ........................................................................................................................... 6240

Annex C (normative): General description of measurement ....................................................... 6341

C.1 Introduction ........................................................................................................................................ 6341

C.2 Conducted measurements ................................................................................................................... 6341

C.3 Radiated measurements ...................................................................................................................... 6341

C.4 Substitution measurement .................................................................................................................. 6442

Annex D (informative): Guidance on declaring the environmental profile .................................. 6644

D.1 Recommended environmental profile ................................................................................................ 6644

D.2 Temperatures ...................................................................................................................................... 6644 D.2.1 Introduction.................................................................................................................................................. 6644 D.2.2 Normal environmental conditions ................................................................................................................ 6644

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ETSI EN 302 571 V2.1.1 (2017-02) 6

D.2.3 Extreme environmental conditions .............................................................................................................. 6644

D.3 Test power source............................................................................................................................... 6745 D.3.1 Introduction.................................................................................................................................................. 6745 D.3.2 Normal test power source ............................................................................................................................ 6745 D.3.2.1 AC mains voltage ................................................................................................................................... 6745 D.3.2.2 Regulated lead-acid battery power sources used on vehicles ................................................................. 6745 D.3.2.3 Other power sources ............................................................................................................................... 6745 D.3.3 Extreme test source voltages ........................................................................................................................ 6745 D.3.3.1 AC mains voltage ................................................................................................................................... 6745 D.3.3.2 Regulated lead-acid battery power sources used on vehicles ................................................................. 6745 D.3.3.3 Power sources using other types of batteries .......................................................................................... 6745 D.3.3.4 Other power sources ............................................................................................................................... 6846 D.3.4 Procedure for equipment designed for continuous transmission.................................................................. 6846 D.3.5 Procedure for equipment designed for intermittent transmission ................................................................ 6846

Annex E (informative): Bibliography ............................................................................................... 6947

Annex F (informative): Change History .......................................................................................... 7048

History .......................................................................................................................................................... 7149

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ETSI EN 302 571 V2.1.1 (2017-02) 7

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 (https://ipr.etsi.org/).

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 HarmonizedHarmonised European Standard (EN) has been produced by ETSI Technical Committee

Electromagnetic compatibility and Radio spectrum Matters (ERM).

The present document has been produced by ETSI in response to mandate M/284 issued from the European

Commissionprepared under Directive 98/34/ECthe Commission's standardisation request C(2015) 5376 final [i.5i.15] as

amended by Directive 98/48/EC [] to provide one voluntary means of conforming to the essential requirements of

Directive 2014/53/EU on the harmonisation of the laws of the Member States relating to the making available on the

market of radio equipment and repealing Directive 1999/5/EC [i.4i.14].

The title and reference toOnce the present document are intended to be included in the publicationis cited in the Official

Journal of the European Union of titles and references of Harmonized Standard under the Directive 1999/5/EC [i.2].

See article 5.1 of Directive 1999/5/EC for information on that Directive, compliance with the normative clauses of the

present document given in Table A.1 confers, within the limits of the scope of the present document, a presumption of

conformity and Harmonised Standards or parts thereof the references of which have been published in the Official

Journal of the European Union.

Thewith the corresponding essential requirements relevant toof that Directive 1999/5/EC [i.2] are summarised in annex

A.

Equipment compliant with the present document can be intended for fitment into road vehicles, therefore it is subject to

automotive EMC type approval and Directive 95/54/EC [i.3]. For use on vehicles outside the scope of

Directive 95/54/EC [i.3], compliance with an EMC directive/standard appropriate for that use is required, and

associated EFTA regulations.

National transposition dates

Date of adoption of this EN: 29 August 20136 February 2017

Date of latest announcement of this EN (doa): 30 November 201331 May 2017

Date of latest publication of new National Standard

or endorsement of this EN (dop/e):

31 May 2014

30 November 2017

Date of withdrawal of any conflicting National Standard (dow): 31 May 201530 November 2018

Introduction

The present document is part of a set of standards developed by ETSI and is designed to fit in a modular structure to

cover all radio and telecommunications terminal equipment within the scope of the R&TTE Directive [i.2]. The

modular structure is shown in EG 201 399

https://ipr.etsi.org/

ETSI

ETSI EN 302 571 V2.1.1 (2017-02) 8

Modal verbs terminology

In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and

"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of

provisions).

"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

https://portal.etsi.org/Services/editHelp!/Howtostart/ETSIDraftingRules.aspx

ETSI

ETSI EN 302 571 V2.1.1 (2017-02) 9

1 Scope

The present document specifies technical characteristics and methods of measurement for radio transmitters and

receivers operating in the frequency range 5 855 MHz to 5 925 MHz. The spectrum usage conditions are set out in

ECC Decision (08)01 [i.1i.41].

1 Scope

The present document applies to corporate communications using radio transmitters and receivers for Intelligent

Transport Systems (ITS). ITS communications may comprise vehicle-to-vehicle, vehicle-to-infrastructure and

infrastructure-to-vehicle.

Table 1a: Radiocommunications service frequency bands

] for the frequency range 5 875 MHz to 5 925 MHz (with 5 905 MHz to 5 925 MHz considered as a future ITS

extension) and in ECC Recommendation (08)01 [i.2i.2] for the frequency range 5 855 MHz to 5 875 MHz. The

Commission Decision 2008/671/EC [i.3i.3] mandates a harmonised use of the frequency band 5 875 MHz to 5 905

MHz dedicated to safety-related applications of ITS throughout the member states of the European Union. Table 1

outlines the 5 GHz ITS frequency band segmentation.

Table 1: 5 GHz ITS frequency band segmentation

Radiocommunications service

frequency bandsFrequenc

y range

Usage Regulation

Transmit 5 855 MHz to 5 925 875 MHz

ITS non-safety applications

ECC Recommendation (08)01 [i.2i.2]

5 875 MHz to 5 905 MHz ITS road safety Commission Decision 2008/671/EC [i.3i.3],

ECC Decision (08)01 [i.1i.1]

Receive 5 855 905 MHz to 5 925 MHz

Future ITS applications

ECC Decision (08)01 [i.1i.1]

The equipment is comprisedpresent document covers the essential requirements of a transmitter and associated encoder

and modulator and/or a receiver and associated demodulator and decoder. The typesarticle 3.2 of equipment covered by

Directive 2014/53/EU [i.4i.4] under the conditions identified in annex A.

Interference mitigation techniques in the present document are as follows:

On Board Equipment (OBE equipment fitted with an integral or dedicated antenna(s), intended for use in

vehicles, e.g. aprovided to protect road or a rail vehicle);

Road Side Equipment (RSE equipment fitted with an antenna socket, integral or dedicated antenna(s), normally used as

a fixed station); e.g. a road or rail infrastructuretolling applications using CEN DSRC or HDR DSRC.

2 References

2.1 Normative references

References are specific, identified by date of publication and/or edition number or version number. Only the cited

version applies.

Referenced documents which are not found to be publicly available in the expected location might be found at

http://docbox.etsi.org/Reference.

http://docbox.etsi.org/Reference

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ETSI EN 302 571 V2.1.1 (2017-02) 10

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.

The following referenced documents are necessary for the application of the present document.

[1] ETSI TR 100 028 (all parts) (V1.4.1) (12-2001): "Electromagnetic compatibility and Radio

spectrum Matters (ERM); Uncertainties in the measurement of mobile radio equipment

characteristics".

[2] CISPR 16 (parts 1-1 (2007), 1-4 (2008) and 1-5 (2003)): "Specifications for radio disturbance and

immunity measuring apparatus and methods; Part 1: Radio disturbance and immunity measuring

apparatus".

[3] ETSI EN 302 663 (V1.2.1) (11-2012): "Intelligent Transport Systems (ITS); Access layer

specification for Intelligent Transport Systems operating in the 5 GHz frequency band".

[4] ETSI TS 102 687 (V1.1.1) (07-2011): "Intelligent Transport Systems (ITS); Decentralized

Congestion Control Mechanisms for Intelligent Transport Systems operating in the 5 GHz range;

Access layer part".

[5] ETSI TS 102 724 (V1.1.1) (10-2012): "Intelligent Transport Systems (ITS); Harmonized Channel

Specifications for Intelligent Transport Systems operating in the 5 GHz frequency band".

[6] ETSI TS 102 792 (V1.2.1.1) (10-2012) (06-2015): "Intelligent Transport Systems (ITS);

Mitigation techniques to avoid interference between European CEN Dedicated Short Range

Communication (CEN DSRC) equipment and Intelligent Transport Systems (ITS) operating in the

5 GHz frequency range".

[272] ETSI TS 102 917-1EN 302 637-2 (V1.1.1) (01-20133.2) (11-2014): "Intelligent Transport Systems

(ITS); Test specifications for the channel congestion control algorithms operating in the 5,9 GHz

rangeVehicular Communications; Basic Set of Applications; Part 1: Protocol Implementation

Conformance Statement (PICS)".2: Specification of Cooperative Awareness Basic Service".

[383] Void.

[4] CISPR 16 (parts 1-1 (2015), 1-4 (2010) and 1-5 (2014)): "Specifications for radio disturbance and

immunity measuring apparatus and methods; Part 1: Radio disturbance and immunity measuring

apparatus".

[5] CEN EN 12253:2004: "Road transport and traffic telematics - Dedicated short-range

communication - Physical layer using microwave at 5,8 GHz".

[6] ETSI TS 102 917-2 (V1.ES 200 674-1 (V2.4.1) (0105-2013): "Intelligent Transport Systems

(ITS); Test specifications for the channel congestion control algorithms operating in the 5,9 GHz

range; Part 2: Test Suite Structure and Test Purposes (TSS & TP)".Road Transport and Traffic

Telematics (RTTT); Dedicated Short Range Communications (DSRC); Part 1: Technical

characteristics and test methods for High Data Rate (HDR) data transmission equipment operating

in the 5,8 GHz Industrial, Scientific and Medical (ISM) band".

[9] ETSI TS 102 917-3 (V1.1.1) (01-2013): "Intelligent Transport Systems (ITS); Test specifications

for the channel congestion control algorithms operating in the 5,9 GHz range; Part 3: Abstract Test

Suite (ATS) and partial Protocol Implementation eXtra Information for Testing (PIXIT)".

2.2 Informative references

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

referenced document (including any amendments) applies.

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

their long term validity.

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ETSI EN 302 571 V2.1.1 (2017-02) 11

The following referenced documents are not necessary for the application of the present document but they assist the

user with regard to a particular subject area.

[i.1] Directive 98/34/EC of the European Parliament and of the Council of 22 June 1998 laying down a

procedure for the provision of information in the field of technical standards and regulations.

[i.2] 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.3] Commission Directive 95/54/EC of 31 October 1995 adapting to technical progress Council

Directive 72/245/EEC on the approximation of the laws of the Member States relating to the

suppression of radio interference produced by spark-ignition engines fitted to motor vehicles and

amending 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.4] ETSI EG 201 399 (V2.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);

A guide to the production of candidate Harmonized Standards for application under the R&TTE

Directive".

[i.5] ETSI TR 102 070-2 (V1.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);

Guide to the application of harmonized standards to multi-radio and combined radio and non-radio

equipment; Part 2: Effective use of the radio frequency spectrum".

[i.6] ECC Decision (08)01: "ECC Decision of 14 March 2008 on the harmonizedharmonised use of the

5875-5925 frequency band for Intelligent Transport Systems (ITS)".)", approved 14 March 2008

and amended 3 July 2015.

[i.272] ECC Recommendation (08)01:"Use of band 5855-5875 MHz for Intelligent Transport Systems

(ITS)".)", approved 21 February 2008 and amended 3 July 2015.

[i.383] ECC Report 101: "Compatibility studies in the band 5855- 5925 MHz between Intelligent

Transport Systems (ITS) and other systems".

[i.9] ETSI TR 102 273 (2001-12) (all parts): "Electromagnetic compatibility and Radio spectrum

Matters (ERM); Improvement of radiated methods of measurement (using test sites) and

evaluation of the corresponding measurement uncertainties".

[i.10] ANSI C63.5 (2004): "American National Standard for Electromagnetic Compatibility-Radiated

Emission Measurements in Electromagnetic Interference (EMI) Control-Calibration of Antennas

(9 kHz to 40 GHz)".

[i.11] ETSI TR 102 492-1: "Electromagnetic compatibility and Radio spectrum Matters (ERM);

Intelligent Transport Systems (ITS); Part 1: Technical characteristics for pan-European

harmonized communications equipment operating in the 5 GHz frequency range and intended for

critical road-safety applications; System Reference Document".

[i.12] ETSI TR 102 492-2: "Electromagnetic compatibility and Radio spectrum Matters (ERM);

Intelligent Transport Systems (ITS); Part 2: Technical characteristics for pan European

harmonized communications equipment operating in the 5 GHz frequency range intended for road

safety and traffic management, and for non-safety related ITS applications; System Reference

Document".

[i.13] Commission Decision 2008/671/EC of 5 August on the harmonised use of radio spectrum in the

5875-5905 MHz frequency band for safety related application of Intelligent Transport Systems

(ITS).

[i.4144] Council Directive 89/336/EEC2014/53/EU of 3 May 1989the European Parliament and of the

Council of 16 April 2014 on the approximationharmonisation of the laws of the Member States

relating to electromagnetic compatibility (EMC Directive).

[i.15] Council Directive 73/23/EEC of 19 February 1973the making available on the harmonization of

the lawsmarket of Member States relating to electricalradio equipment designed for use within

certain voltage limits

(LVand repealing Directive). 1999/5/EC.

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ETSI EN 302 571 V2.1.1 (2017-02) 12

[i.5] Commission Implementing Decision C(2015) 5376 final of 4.8.2015 on a standardisation request

to the European Committee for Electrotechnical Standardisation and to the European

Telecommunications Standards Institute as regards radio equipment in support of Directive

2014/53/EU of the European Parliament and of the Council.

[i.6] ETSI TR 100 028 (all parts) (V1.4.1) (12-2001): "Electromagnetic compatibility and Radio

spectrum Matters (ERM); Uncertainties in the measurement of mobile radio equipment

characteristics".

[i.7] ETSI TR 100 028-2 (V1.4.1) (12-2001): "Electromagnetic compatibility and Radio spectrum

Matters (ERM); Uncertainties in the measurement of mobile radio equipment characteristics;

Part 2".

[i.8] ETSI TS 103 175 (V1.1.1) (06-2015): "Intelligent Transport Systems (ITS); Cross Layer DCC

Management Entity for operation in the ITS G5A and ITS G5B medium".

[i.9] IEEE 802.11™-2012: "IEEE Standard for Information technology - Telecommunications and

information exchange between systems - Local and metropolitan area networks - Specific

requirements - Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)

Specifications".

3 Definitions, symbols and abbreviations

3.1 Definitions

For the purposes of the present document, the following terms and definitions given in Directive 2014/53/EU [i.4i.4]

and the following apply:

available channel: channel identified as available for use as an Operating Channel having performed a "listen before

talk check" first

channel: amount of spectrum used by a single ITS device operating on one of the carrier frequencies listed in table 2b

of the present document

5 GHz ITS frequency band: frequency bands 5 855 MHz to 5 875 MHz (ITS-G5B), 5 875 MHz to 5 905 MHz

(ITS-G5A) and 5 905 MHz to 5 925 MHz (ITS-G5D)

channel busy ratio (CBR): time-dependent value between zero and one representing the fraction of time that a single

radio channel is busy with transmissions

dedicated antenna: removable antenna supplied and tested with the radio equipment, designed as an indispensable part

of the equipment

NOTE: The dedicated antenna has been designed or developed for one or more specific types of equipment. It is

the combination of dedicated antenna and radio equipment that is expected to be compliant with the

regulations.

Decentralized Congestion Control (DCC): technique in which the transmitter output power and transmission timing

limits are controlled resulting in less congestion on the radio channel

duty cycle: defined as the ratio, expressed as a percentage of the transmitter total "on" time on one carrier frequency,

relative to 1 second period

integral antenna: antenna designed as a fixed part of the equipment, without the use of an external connector and as

such which can notcannot be disconnected from the equipment by the user

NOTE: An integral antenna may be fitted internally or externally.

Listen Before Talk (LBT): monitoring method in which the RF channel is checked for activity before transmitting

protected zone: area defined where mitigation mechanisms are applied to protect CEN DSRC and HDR DSRC road

tolls

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ETSI EN 302 571 V2.1.1 (2017-02) 13

radiated measurements: measurements which involve the absolute measurement of a radiated field

Transmit Power Control (TPC): technique in which the transmitter output power is controlled resulting in reduced

interference to other users

Transmit Power Control range: power range over which the TPC is able to control the transmitter output power

vehicle: all kinds of land mobile vehicle, e.g. a road or

EXAMPLE: Road vehicle and rail vehicle.

3.2 Symbols

For the purposes of the present document, the following symbols apply:

dB decibel

dBi antenna gain relative to isotropic radiator in decibel

dBc decibel relative to carrier power

E electrical field strength

f frequency

fc nominal centre frequency

G antenna gain

PH highest power level

PL lowest power level

PM lowest TPC power level

PT transmit power level

R distance

Tbusy period of time the channel is busy

TCBR period of time

Tmax maximum temperature

Tmin minimum temperature

Tx on effective transmitter on-time

Tx off effective transmitter off-time Toff time between two transmissions

Ton duration of a transmission

Vmax maximum voltage

Vmin minimum voltage

Vnominal nominal voltage

ohm

µs microsecond

3.3 Abbreviations

For the purposes of the present document, the following abbreviations apply:

AC Alternative Current

BPSK Binary Phase Shift Keying

BW bandwidth

CAM Cooperative Awareness Message

CBR Channel Busy Ratio

CEN Comitte EuropeenComité Européen de Normalisation (European Committee for Standardization)

CISPR Comité International Spécial des Perturbations Radioélectriques (International Special Committee

on Radio Interference)

CW Continuous Wave

DC Direct Current

DCC Decentralized ChannelCongestion Control

DCR Duty Cycle Restriction

DSRC Dedicated Short Range Communication (CEN DRSC = tolling at 5,8 GHz)

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ETSI EN 302 571 V2.1.1 (2017-02) 14

DUT Device Under Test

e.i.r.p. equivalent isotropically radiated power

e.r.p. effective radiated power

EC European Commission

ECC Electronic Communication Committee

EFTA European Free Trade Association

EMC Electro MagneticElectroMagnetic Compatibility

EUT Equipment Under Test

FEC Forward Error Correction

HS Harmonized Standard

IF Intermediate Frequency

EN European Norm

EU European Union

HDR High Data Rate

ITS Intelligent Transport Systems

ITS-G5 Frequency band for Intelligent Transportation Systems ranging from 5,875 up to 5,925 GHz

LBT Listen Before Talk

OBE On Board Equipment

LP Linear Polarized

OOB Out-Of-Band

PD mean Power Density

PER Packet Error Rate

PH Highest power level

PL Lowest power level

ppm parts per million = 10-6

PSD Power Spectral Density

QAM Quadrature Amplitude Modulation

QPSK Quadrature Phase Shift Keying

RBW Resolution Bandwidth

RF Radio Frequency

RSE Road Side Equipment

RSU Road Side Unit

RMS Root Mean Square

TPC Transmit Power Control

TTE Telecommunication Terminal Equipment

TX Transmit

UUT Unit Under Test

VSWR Voltage Standing Wave Ratio

4 General

4.1 Presentation of equipment for testing purposes

Each equipment submitted for testing shall fulfil the requirements of the present document on all frequencies over

which it is intended to operate.

The provider shall declare the frequency ranges, the range of operating conditions and power requirements as

applicable, to establish the appropriate test conditions.

Additionally, technical documentation and operating manuals, sufficient to make the test, shall be supplied.

4.1.1 Choice of model for testing

The provider shall provide one or more samples of the equipment, as appropriate for testing.

Stand-alone equipment shall be offered by the provider complete with any ancillary equipment needed for testing.

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ETSI EN 302 571 V2.1.1 (2017-02) 15

If an equipment has several optional features considered not to affect the RF parameters, then the tests need only to be

performed on the equipment configured with the combination of features considered to be the most complex, as

proposed by the provider and agreed by the test laboratory.

Where practicable, equipment offered for testing shall provide a 50 connector for conducted RF power level

measurements.

In the case of a dedicated integral antenna equipment, if the equipment does not have an internal permanent 50

connector, then it is permissible to supply a second sample of the equipment with a temporary antenna connector fitted

to facilitate testing.

The performance of the equipment submitted for testing shall be representative of the performance of the corresponding

production model.

The equipment may contain digital circuit elements, radio circuit elements and other elements whose performance is not

covered by the present document. These elements of the equipment shall meet the appropriate performance

requirements for those components, as specified in other standards.

An ITS device which is combined with other system(s) should meet at least the requirements of the present document

(for the elements of the device concerned with radio communications), and the requirements of any relevant standard

for EMC compatibility of the other equipment for the elements of the device which are not concerned with radio

communications.

EXAMPLE: An ITS communications device combined with a navigation system.

NOTE: For further information on this topic see TR 102 070-2 [i.5].

4.1.1.1 Auxiliary test equipment

All necessary test signal sources, setting up instructions and other product information shall accompany the equipment

when it is submitted for testing.

4.1.1.2 Declarations by the provider

The provider shall declare the necessary information of the equipment with respect to all technical requirements set by

the present document.

4.2 Mechanical and electrical design

4.2.1 General

The equipment shall be designed, constructed and manufactured with the aim of minimizing harmful interference to

other equipment and services.

4.2.2 Controls

Those controls, which if maladjusted, might increase the interfering potentialities of the equipment shall not be

accessible for adjustment by the user.

4.3 Testing using bit streams or messages

The manufacturer may elect to have the equipment tested using bit streams or data packets.

4.4 Measuring continuous mode equipment

In the case of measurements performed on equipment designed to operate only in continuous mode, requirements such

as "equipment shall be set in continuous mode" shall be interpreted as "equipment shall be used in its normal

transmission mode (in this case, the continuous mode)".

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4.5 Measuring discontinuous mode equipment

When it is specified that the transmission shall be continuous for the duration of the measurement(s), the transmitter

under test shall be set to operate in continuous mode. If this is not possible, the measurements shall be carried out in a

period shorter than the duration of the transmitted burst. It may be necessary to extend the duration of the burst.

When measurements are made in discontinuous mode, the reported values can be average values. This averaging shall

be made using a set of measurements, each of these measurements being made during a burst or a part of it.

4.6 Receiver category

The product family of ITS radio devices is divided into three receiver categories, see table 1b, each having a set of

relevant receiver requirements and minimum performance criteria. The set of receiver requirements depends on the

choice of receiver category by the equipment provider.

Manufacturers when designing their ITS receivers shall choose one of the three receiver categories according to the

grade of operational reliability they provide, therefore the provider shall specify the receiver category of his choice and

this shall be declared in the product literature provided to the user. In particular where an ITS device which may have to

support road-safety related applications, manufacturers and users should pay particular attention to the potential for

interference from other systems operating in the same or adjacent bands. Manufacturers should provide advice to users

on the risks of potential interference and its consequences.

Table 1b: Receiver categories

Receiver category Risk assessment of receiver performance

Enhanced 1

Medium reliable ITS communication media e.g. causing inconvenience to persons, which cannot simply be overcome by other means.

Minimum

Standard reliable ITS communication media e.g. inconvenience to persons, which can simply be overcome by other means.

The receiver category Enhanced 1 or Minimum shall be stated in both the test report and in the user's manual for the

equipment.

4.6.1 General performance criteria

For the purpose of the receiver performance tests, the receiver shall produce an appropriate output under normal

conditions after demodulation, a packet error rate of 10-1 (for packesize see clause 6.10.2).

Where the indicated performance cannot be achieved, the performance criteria used to determine the performance of the

receiver shall be declared and published by the provider.

5 Test conditions, power sources and ambient temperatures

5.1 Normal and extreme test conditions

Testing shall be made under normal test conditions, and also, where stated, under extreme test conditions.

The test conditions and procedures shall be as specified in clauses 5.2 to 5.5.

5.2 Test power source

During testing the power source of the equipment shall be replaced by a test power source capable of producing normal

and extreme test voltages as specified in clauses 5.3.2 and 5.4.2. The internal impedance of the test power source shall

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ETSI EN 302 571 V2.1.1 (2017-02) 17

be low enough for its effect on the test results to be negligible. For the purpose of tests, the voltage of the power source

shall be measured at the input terminals of the equipment.

For battery operated equipment the battery shall be removed and the test power source shall be applied as close to the

battery terminals as practicable.

During tests of DC powered equipment the power source voltages shall be maintained within a tolerance of < ±1 %

relative to the voltage at the beginning of each test. The value of this tolerance is critical for power measurements, using

a smaller tolerance will provide better measurement uncertainty values.

5.3 Normal test conditions

5.3.1 Normal temperature and humidity

The normal temperature and humidity conditions for tests shall be any convenient combination of temperature and humidity

within the following ranges:

temperature: +15 °C to +35 °C;

relative humidity: 20 % to 75 %.

When it is impracticable to carry out the tests under these conditions, a note to this effect, stating the ambient temperature

and relative humidity during the tests, shall be added to the test report.

5.3.2 Normal test power source

5.3.2.1 Mains voltage

The normal test voltage for equipment to be connected to the mains shall be the nominal mains voltage. For the purpose

of the present document, the nominal voltage shall be the declared voltage or any of the declared voltages for which the

equipment was designed.

The frequency of the test power source corresponding to the ac mains shall be between 49 Hz and 51 Hz.

5.3.2.2 Regulated lead-acid battery power sources used on vehicles

When the radio equipment is intended for operation from the usual types of regulated lead-acid battery power source

used on vehicles the normal test voltage shall be 1,1 times the nominal voltage of the battery (e.g. for nominal voltages

of 6 V and 12 V, these are 6,6 V and 13,2 V respectively).

5.3.2.3 Other power sources

For operation from other power sources or types of battery (primary or secondary), the normal test voltage shall be that

declared by the equipment manufacturer.

5.4 Extreme test conditions

5.4.1 Extreme temperatures

For tests at extreme temperatures, measurements shall be made in accordance with the procedures specified in

clause 5.5, at the upper and lower temperatures:

temperature: -30 °C to +70 °C.

The manufacturer can also declare which extreme conditions the equipment is intended to be installed in. In this case

the upper temperature can be above +70 °C and the lower temperature can be below -30 °C as declared by the

manufacturer.

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5.4.2 Extreme test source voltages

5.4.2.1 Mains voltage

The extreme test voltage for equipment to be connected to an ac mains source shall be the nominal mains voltage

±10 %.

5.4.2.2 Regulated lead-acid battery power sources used on vehicles

When the equipment is intended for operation from the usual types of regulated lead-acid battery power sources used on

vehicles the extreme test voltages shall be 1,3 and 0,9 times the nominal voltage of the battery (e.g. for a nominal voltage of

6 V, these are 7,8 V and 5,4 V respectively and for a nominal voltage of 12 V, these are 15,6 V and 10,8 V respectively).

5.4.2.3 Power sources using other types of batteries

The lower extreme test voltages for equipment with power sources using batteries shall be as follows:

- for the nickel metal-hydride, leclanché or lithium type: 0,85 times the nominal battery voltage;

- for the mercury or nickel-cadmium type: 0,9 times the nominal battery voltage.

No upper extreme test voltages apply.

In the case where there is no upper extreme test voltage the nominal voltage is applicable, the corresponding four

extreme test conditions are:

Vmin/Tmin, Vmin/Tmax;

(Vnominal)/Tmin, (Vnominal)/Tmax.

5.4.2.4 Other power sources

For equipment using other power sources, or capable of being operated from a variety of power sources, the extreme test

voltages shall be those declared by the equipment manufacturer.

5.5 Procedure for tests at extreme temperatures

Before measurements are made the equipment shall have reached thermal balance in the test chamber. The equipment

shall be switched off during the temperature stabilizing period.

In the case of equipment containing temperature stabilization circuits designed to operate continuously, the temperature

stabilization circuits may be switched on for 15 minutes after thermal balance has been obtained, and the equipment

shall then meet the specified requirements. For such equipment the manufacturer shall provide for the power source

circuit feeding the crystal oven to be independent of the power source for the rest of the equipment.

If the thermal balance is not checked by measurements, a temperature stabilizing period of at least one hour, or a longer

period as may be decided by the testing laboratory, shall be allowed. The sequence of measurements shall be chosen,

and the humidity content in the test chamber shall be controlled so that excessive condensation does not occur.

5.5.1 Procedure for equipment designed for continuous transmission

If the manufacturer states that the equipment is designed for continuous transmission, the test procedure shall be as follows.

Before tests at the upper extreme temperature, the equipment shall be placed in the test chamber, and left until thermal

balance is attained. The equipment shall then be switched on in the transmit condition for a period of half an hour, after

which the equipment shall meet the specified requirements.

Before tests at the lower extreme temperature, the equipment shall be left in the test chamber until thermal balance is

attained, then switched to the standby or receive condition for a period of one minute, after which the equipment shall meet

the specified requirements.

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5.5.2 Procedure for equipment designed for intermittent transmission

If the manufacturer states that the equipment is designed for intermittent transmission, the test procedure shall be as follows.

Before tests at the upper extreme temperature, the equipment shall be placed in the test chamber, and left until thermal

balance is attained. The equipment shall then be switched on for one minute in the transmit condition, followed by four

minutes in the receive condition, after which the equipment shall meet the specified requirements.

For tests at the lower extreme temperature, the equipment shall be left in the test chamber until thermal balance is attained,

then switched to the standby or receive condition for one minute, after which the equipment shall meet the specified

requirements.

5.5.3 Testing of equipment that does not have an external 50 RF connector (integral antenna equipment)

Where equipment has an internal 50 Ω connector it shall be permitted to perform the tests at this connector.

Equipment may also have a temporary internal 50 Ω connector installed for the purposes of testing.

No connection shall be made to any internal permanent or temporary antenna connector during the performance of

radiated emissions measurements, unless such action forms an essential part of the normal intended operation of the

equipment, as declared by the manufacturer.

6 Technical requirements specifications

64.1 Environmental profile

The technical requirements of the present document apply under the environmental profile for operation of the

equipment, which shall be stateddeclared by the manufacturer. The equipment shall comply with all the technical

requirements of the present document which are identified as applicable in annex A at all times when operating within

the boundary limits of the stateddeclared operational environmental profile.

6.2 Carrier Frequencies

6Recommended environmental profile parameters are summarized in annex D.

4.2 Conformance requirements

4.2.1 Transmitter frequency stability

4.2.1.1 Definition

The ITS carrier frequencies are those identified by the European profile standard on the physical and medium access

layer of 5 GHz ITS EN 302 663 V1.2.1 [3] as shown in tables 2a and 2b.

Table 2a: Frequency allocation in the European Union

Frequency range Usage Regulation

5 905 MHz to 5 925 MHz Future ITS applications ECC Decision [i.6]

5 875 MHz to 5 905 MHz ITS road safety ECC Decision [i.6] Commission Decision [i.13]

5 855 MHz to 5 875 MHz ITS non-safety applications ECC Recommendation [i.7]

The equipment is required to operate on the applicable specific carrier centre frequencies that correspond to the nominal

carrier frequencies, fc, as defined in table 2bTable 2.

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Table 2b2: Nominal carrier frequency allocations

Channel name Carrier centre frequency fc

(MHz)

Maximum channel bandwidth (MHz)

G5-SCH4 5 860 10

G5-SCH3 5 870 10

G5-SCH1 5 880 10

G5-SCH2 5 890 10

G5-CCH 5 900 10

G5-SCH5 5 910 10

G5-SCH6 5 920 10

6The frequency channels together with the channel names contained in the three different frequency bands are depicted

in Figure 1.

5 860 5 870 5 880 5 890 5 900 5 910 5 920 MHz

Figure 1: An overview of the three different frequency bands

4.2.1.2 Limits

The actual carrier centre frequency for any given channel given in table 2bTable 2 shall be maintained within the range

fc ± 20 ppm.

64.2.1.3 Conformance

Conformance tests as defined in clause 75.3.2 shall be carried out.

6.3 RF Output Power, Transmit Power Control (TPC) and Power Spectral Density (PSD)

6.3.1 Definitions

6.3.1.14.2.2 RF output power

4.2.2.1 Definition

The radio frequency (RF) output power is the total mean equivalent isotropically radiated power (e.i.r.p.) during a

transmission burstbursts.

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6.3.1.2 Decentralized Congestion Control

Decentralized Congestion Control (DCC) is a mandatory mechanism to be used by the UUT to ensure that the radio

channel is not congested by too many transmitters which can be heard within a certain geographical range. The

mechanism is such that the UUT adapts its transmitter output power and transmission timing dynamically based on how

occupied the channel is at the moment. The implementation shall be in accordance with TS 102 687 [4] for the access

layer and shall comply to the testing procedures defined in TS 102 917-1 [7], TS 102 917-2 [8] and TS 102 917-3 [9].

6.3.14.2.2.2 Limits

The maximum RF output power shall not exceed 33 dBm e.i.r.p.

4.2.2.3 Conformance


4.2.3 Power Spectral Densityspectral density

The Power Spectral Density (PSD) is the mean equivalent isotropically radiated 4.2.3.1 Definition

The power spectral density (PSD) is the mean e.i.r.p. spectral density during a transmission burst. bursts.

64.2.3.2 Limits

6.3.2.1 Total RF output power andThe maximum power spectral density at the highest power level

The total RF output power and the power spectral density when configured to operate at the highest stated power level

of the TPC range shall not exceed the levels given in table 3. 23 dBm/MHz e.i.r.p.

Table 3: Limits for total RF output power and Power Spectral Density at the highest power level

Frequency range (MHz)

RF output power limit (e.i.r.p.) (dBm)

Power spectral density limit (e.i.r.p.)

(dBm/MHz)

5 855 to 5 925 33 23 for G5-SCH2 and G5-SCH3

0 for G5-SCH4

23 13 for G5-SCH2 and G5-SCH3

-10 for G5-SCH4

6.3.2.2 Total RF output power and power spectral density at the lowest power level

The total RF output power and the power spectral density when configured to operate at the lowest stated power level of

the TPC range shall not exceed the levels given in table 4.

Table 4: Limits for total RF output power and Power Spectral Density at the lowest power level

Frequency range (MHz)

RF output power limit (e.i.r.p.) (dBm)

Power Spectral Density limit (e.i.r.p.)

(dBm/MHz)

5 855 to 5 925 -7 -17



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6.44.2.4 Transmit power control

4.2.4.1 Definition

Transmit power control (TPC) is a mechanism to be used to ensure co-existence with CEN DSRC at toll plazas and to

be used as one mechanism by decentralized congestion control (DCC) to reduce the congestion on the communication

channel.

4.2.4.2 Limits

The TPC range shall at least be 3 dBm up to the maximum specified RF output power e.i.r.p of the equipment.

4.2.4.3 Conformance

Conformance test according to clause 5.3.3 shall be carried out.

4.2.5 Transmitter unwanted emissions

6.4.2.5.1 Transmitter unwanted emissions outside the 5 GHz ITS frequency bandsband

6.4.2.5.1.1 Definition

These are radio frequency emissions outside the 5 GHz ITS bands fromfrequency band (outside of 5 855 MHz to 5 925

MHz.).

6.4.2.5.1.2 Limits

The power level of any spurious emission, occurring less than 2,5 wanted channel bandwidth from the centre of the

channel on which the transmitter is intended to operate, shall not exceed the values given in table 6a.

The power level of any spurious emission, occurring 2,5 wanted channel bandwidth or more from the centre of the

channel on which the transmitter is intended to operate, shall not exceed the values given in tables 5 and 6b.

Table 5In Table 3 and Table 4, transmitter unwanted emission limits in the spurious domain below 1 GHz and above 1

GHz are tabulated, respectively.

Table 3: Transmitter unwanted emission limits in the spurious domain below 1 GHz

Frequency range Maximum power, (e.r.p.) (dBm) Reference bandwidth

30 MHz f 1 GHz -36 100 kHz

Table 6a4: Transmitter unwanted emission limits fromemissions in the spurious domain above 1 GHz to 18 GHz and outside the 5 GHz ITS frequency bands outside the frequency offsets specified in table

6b

Frequency range Maximum power, (e.i.r.p.) (dBm) Reference

bandwidthBandwidth

1 GHz f 000 MHz to 5, 795 GHzMHz

-30 dBm 1 MHz

5, 795 GHz f MHz to 5, 815 GHz MHz

-65see clause 4.2.9.2 1 MHz

5, 815 GHz f MHz to 5,850 GHz 835 MHz

-5530 dBm 1 MHz

5,850 GHz f 5,855 GHz -30 1 MHz

5,925 GHz f 5,965 GHz -65 1 MHz

5,965 GHz f 945 MHz to 18 GHz

-30 dBm 1 MHz

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In Table 6b: Reference bandwidths to be used close to the wanted5, transmitter unwanted emission

limits in the out-of-band domain of the 5 GHz ITS frequency band.

The out-of-band domain is defined as ±250 % of the channel bandwidth, and then the out-of-band (OOB) domain for

equipmentthe 5 GHz ITS frequency band is 5 835 MHz to 5 855 MHz at the lower part and 5 925 MHz to 5 945 MHz at

the higher part of the frequency band.

Table 5: Transmitter unwanted emission limits in the out-of-band domain of the 5 GHz ITS frequency band

Frequency offset from carrierrange RBWMaximum power, (e.i.r.p.)

(dBm) Reference bandwidth

less than 250 % of the channel bandwidth 1 kHz

205 835 MHz to less than 405 855 MHz -30 kHz 1 MHz

405 925 MHz to less than 605 945 MHz 300 kHz-30 1 MHz

Best measurement practice:

The resolution bandwidth of the measuring receiver should be equal to the reference bandwidth as given in the tables

above. To improve measurement accuracy, sensitivity and efficiency, the resolution bandwidth can be different from the

reference bandwidth. When the resolution bandwidth is smaller than the reference bandwidth, the result should be

integrated over the reference bandwidth. When the resolution bandwidth is greater than the reference bandwidth, the

result for broadband spurious emissions should be normalized to the bandwidth ratio. For discrete spurious emissions,

normalization is not applicable, while integration over the reference bandwidth is still applicable.

6.In Figure 2, the transmitter unwanted emission limits are depicted for the 5 GHz ITS frequency band (ITS-G5A,

ITS-G5B, and ITS-G5D frequency bands).

5 795 5 815 5 855 5 925 5 945 MHz

-65

dBm/MHz

-30

ITS

frequency

band

5 835

OOB OOB

Extended

limits

NOTE

NOTE: The limit could vary by the implementation of Clause 4.2.9, -65 dBm is the lowest limit.

Figure 2: Transmitter unwanted emission limits for the 5 GHz ITS frequency band

4.2.5.1.3 Conformance


6.4.2.5.2 Transmitter unwanted emissionsspectrum mask within the 5 GHz ITS frequency bandsband for 10 MHz channels

6.4.2.5.2.1 Definition

These are unwanted radio frequency emissions (e.i.r.p.) from the transmitterTransmitter spectrum mask within the 5

GHz ITS bands at the highest power level of the equipmentfrequency band for 10 MHz channels.

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6.4.2.5.2.2 Limits

The mean levels of the transmitted spectrum within the 5 GHz ITS bands shall not exceed the limits given in

table 7Table 6 shall not be exceeded.

Table 76: Transmitter unwanted emission limits inside the 5 GHz ITS bands (e.i.r.p.) -spectrum mask for 10 MHz channel bandwidth

Power Spectral Density at the carrier

centreCarrier frequency fc

(dBm/MHzdBc)

± 4,5 MHz Offset

(dBm/MHzoffset (dBc)

± 5,0 MHz Offset


± 5,5 MHz Offset


± 10 MHz Offset


± 15 MHz Offset


230 230 -326 -932 -1740 -2750

The limits are reduced by 10 dB for the G5-SCH2 and G5-SCH3 channels and by 33 dB for G5-SCH4.

For unwanted emissions outside the frequency range from 5 855 MHz to 5 925 MHz the limits in clause 6.4.1.2,

tables 5, 6a and 6b apply.

6.4The relative power values given in Table 6 are valid for the maximum allowed output power as given in clause

4.2.2.2. For devices with lower maximum output power values, absolute limits shall be calculated at maximum allowed

output power given in clause 4.2.2.2 and these absolute values shall be used for testing devices with lower output power

values. It has to be noted that the spectrum mask is only applicable within 5 855 MHz to 5 925 MHz. Below 5 855 MHz

and above 5 925 MHz the requirements in clause 4.2.5.1 apply.



4.2.6.5 Receiver spurious emissions

4.2.6.5.1 Definition

Receiver spurious emissions are emissions at any frequency when the equipment is in receive mode.

4.2.6.5.2 Limits

The spurious emissions of the receiver shall not exceed the limits given in table 8Table 7.

Table 87: Spurious radiated emission limits

Frequency range Maximum power Measurement

bandwidth Special requirement

30 MHz f 1 GHz000 MHz -57 dBm (e.r.p.) 100 kHz n/a

1 000 MHz f 5 795 MHz -47 dBm (e.i.r.p.) 1 MHz n/a

5 795 MHz f 5 815 MHz

-60 dBm (e.i.r.p.) 1 MHz Applicable for an intended

antenna installation ≤ 2 meters above the ground level.

-65 dBm (e.i.r.p.) 1 MHz Applicable for an intended

antenna installation > 2 meters above the ground level.

1 GHz5 815 MHz f 18 GHz

-47 dBm (e.i.r.p.) 1 MHz n/a



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6.6 Listen Before Talk threshold

6.6.1 Definitions

The LBT threshold is defined as the received signal level above which the equipment can determine that the channel is

not available for use. If the received signal is below the LBT threshold then the equipment can determine that the

channel is available for use.

This requirement applies only to equipment operating in the frequency range from 5 855 MHz to 5 875 MHz.

6.64.2 Limits

The maximum LBT threshold for the receiver is given in table 9.

Table 9: LBT threshold values

ITS Power Spectral Density (dBm/MHz)

LBT threshold value (see notes 1 and 2)

23 -85 dBm

NOTE 1: This is the level at the input of the receiver assuming a 0 dBi receive antenna. NOTE 2: For ITS frames transmitted at a lower e.i.r.p. spectral density and/or with a

different receive antenna gain G (dBi), the LBT threshold for this frame follows the following relationship: LBT Detection Threshold (dBm) = -85 + 23 – ITS e.i.r.p. Spectral Density (dBm/MHz) + G (dBi). See table 10 for example calculations.

Table 10: Example interference threshold values

Maximum e.i.r.p. (dBm)

Channel Width (MHz)

ITS Spectral Density

(dBm/MHz)

LBT Threshold (dBm), for receive

antenna gain G (dBi) = 5

LBT Threshold (dBm), for receive

antenna gain G (dBi) = 8

33 10 23 -80 -77

30 10 20 -77 -74

27 10 17 -74 -71

6.6.3 Conformance


6.7 Receiver blocking or desensitizationselectivity

64.2.7.1 Definition

BlockingReceiver selectivity is a measure of the capability of the receiver to receive areceiver's ability to discriminate

between wanted modulated signal without exceeding a given degradation due to which the presence of anreceiver is

tuned to and unwanted input signal at any frequencies signals stemming from other than those of the spurious responses

or the adjacent channels or frequency bands. Receiver selectivity herein is comprised of:

This requirement applies only to equipment operating in the frequency range from 5 855 MHz to 5 875 MHz.

6.7.2 Limits

The absolute blocking level into the receiver shall not be less than -35 dBm for a wanted signal level for generator A

(see clause 7.3.8.2) of +16 dB above the LBT threshold.

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ETSI EN 302 571 V2.1.1 (2017-02) 26

6.7.3 Conformance


6.8 Receiver i) adjacent channel rejection;

6.8.1 Definition

ii) alternate channel rejection; and

iii) blocking.

The adjacent channel rejection is a measure of the capability of the receiver to operate satisfactorily in the presence of

an ITSa signal in the adjacent channel, which differs in frequency from the wanted signal by an amount equal to the

adjacent channel separation for which the equipment is intended± 10 MHz.

The receiver saturationalternate channel rejection is a measure of the capability of the receiver to operate as

intendedsatisfactorily in the presence of a strong signal in the wanted channel together with a strong signal in

thealternate adjacent channel, which differs in frequency from the wanted signal by an amount equal to the adjacent

channel separation for which± 20 MHz.

Blocking is a measure of the capability of the receiver to operate satisfactorily in the presence of a signal in frequency

band further away and it shall be tested at ± 50 MHz, ± 100 MHz, and ± 200 MHz. Blocking testing shall be performed

at least at 6 different frequency offset positions. The manufacturer of the equipment is intendedcan add additional

frequency offsets positions.

The manufacturer of the equipment shall declare the most sensitive modulation scheme that the equipment is intended

to operate with and declared modulation scheme shall be used for all receiver selectivity tests in clause 5.3.7.

4.2.7.2 Limits

The receiver adjacent channel rejectionselectivity parameters under specified conditions shall be equal to or greater than

the limits in

table 10a.

Table 10a: Limit8.

Table 8: Limits for receiver adjacent channel rejection at BPSK rate ½and

alternate adjacent channel rejection

Center frequency

(MHz)Modulation

Coding rate Adjacent channel

rejection (dB)

Alternate adjacent channel rejection

(dB)

5 860 BPSK 1/2 28 (Enhance 1) 16 (Minimum)

42 (Enhanced 1) 32 (Minimum)

5 870BPSK 3/4 28 (Enhance 1)

16 (Minimum)15 42 (Enhanced 1) 32 (Minimum)31

5 880QPSK 1/2 28 (Enhance 1)

16 (Minimum)13 42 (Enhanced 1) 32 (Minimum)29

QPSK 3/4 11 27

5 89016-QAM 1/2 28 (Enhance 1) 16 (Minimum)8

42 (Enhanced 1) 32 (Minimum)24





5 92064-QAM 3/4 28 (Enhance 1) 16 (Minimum)-1


6.NOTE: The parameters and values in Table 8 are extracted from Table 18-14 in IEEE 802.11-2012 [i.9i.9].

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ETSI EN 302 571 V2.1.1 (2017-02) 27

The blocking level shall not be less than -30 dBm.

4.2.7.3 Conformance


6.9 Transient power

6.9.1 Definition

Transient power is the power falling into adjacent spectrum due to switching the transmitter on and off during normal

operation.

6.94.2 Limits

At all frequencies where the emission levels measured in step 1 exceed the spurious domain limits, the power level

measured in step 1 shall not exceed the power level measured in step 2 by more than 3 dB.

6.9.3 Conformance


6.10.8 Receiver sensitivity

6.104.2.8.1 Definition

The receiver sensitivity is defined as the minimum receive signal level at the antenna connector required for a given

packet error rate, coding rate and modulation scheme (noise factor of 10 dB and 5 dB implementation margins are

assumed).

6.104.2.8.2 Limits

The receiver sensitivity is specified in EN 302 663 [3] and shall be less or equal to the values given in table 10bTable 9

for a packet error rate (PER) of 10 %-1 for 1 000 octet frames. assuming stationary, non-fading channel conditions.

Table 10b9: Receiver sensitivity

Modulation Coding rate Minimum sensitivity (dBm)

(for 10 MHz channel spacing (dBm)

BPSK 1/2 –-85

BPSK 3/4 –-84

QPSK 1/2 –-82

QPSK 3/4 –-80

16-QAM 1/2 –-77

16-QAM 3/4 –-73

64-QAM 2/3 –-69

64-QAM 3/4 –-68

6.10NOTE: The parameters and values in Table 9 are extracted from Table 18-14 in IEEE 802.11-2012 [i.9i.9].

4.2.8.3 Conformance


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ETSI EN 302 571 V2.1.1 (2017-02) 28

6.11 CEN DSRC protection

6.114.2.9 Interference mitigation for CEN DSRC and HDR DSRC in the frequency band 5 795 MHz to 5 815 MHz

4.2.9.1 Definition

To ensure coexistence the ITS-G5 equipment shall not interfere with CEN DSRC equipment. This shall be achieved by

implementing at least one of the coexistence methods specified in TS 102 792 [protect operation of electronic toll

collection in the frequency band 5 795 MHz to 5 815 MHz from harmful interference, mitigation techniques have to be

implemented as defined in ETSI TS 102 792 [161]. Other mitigation techniques compatible with the methods

specifiedDifferent co-existence modes to protect CEN DSRC and HDR DSRC are defined in ETSI TS 102 792 [161]

providing an equivalent or better protection shall be allowed. ]. If the equipment is continuously operating in co-

existence mode A or co-existence mode B no further interference mitigation technique is needed, see ETSI TS 102 792

[1], Table 5.3. Simplified mitigation technique is allowed with fixed installed equipment fulfilling restrictions defined

in ETSI TS 102 792 [1], clause 5.5.2.

6.114.2.9.2 Limits

The ITS-G5 equipment shall not exceed the limits givenprovided in ETSI TS 102 792 [161].

6.11], Table 5.3 Conformance

The ITS-G5 equipment, shall not be conform to exceeded.

The limits provided in ETSI TS 102 792 [161].

7], clause 5.2.5, shall not be exceeded.

The limits provided in ETSI TS 102 792 [1], clause 5.2.5, are referring to a circular polarized antenna. For a linear

polarized antenna subtract 3 dB to the values in ETSI TS 102 792 [1], clause 5.2.5.

4.2.9.3 Conformance

Conformance tests as defined in clause 5.3.9 and clause 5.3.10 shall be carried out.

Equipment not continuously operating in co-existence mode A or co-existence mode B shall be capable of receiving a

cooperative awareness message (CAM) as defined in ETSI EN 302 637-2 [2], to decode the protected zone information

and to mitigate as defined in ETSI TS 102 792 [1], clause 5.2.2.

One or both methods to detect road toll protected zones shall be implemented:

a) Protected zone database, see ETSI TS 102 792 [1], clause 5.2.4.

b) Short-range RF detector, see ETSI TS 102 792 [1], clause 5.2.5.

When using a short-range RF detector (b) also protected zone information in received CAMs from surrounding ITS

stations equipped with short-range RF detector shall be considered, see ETSI TS 102 792 [1], clause 5.2.2.2.

An equipment shall enter a co-existence mode as outlined in ETSI TS 102 792 [1], Table 5.3, when the equipment

enters a protected zone, see ETSI TS 102 792 [1], clause 5.1.

Personal equipment have special requirements defined in ETSI TS 102 792 [1], clause 5.6.

4.2.10 Decentralized congestion control

4.2.10.1 Definition

Decentralized congestion control (DCC) is a mandatory mechanism to be used by the equipment using the access layer

technology based on IEEE 802.11-2012 [i.9i.9] to ensure that the radio channel is not congested by too many

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ETSI EN 302 571 V2.1.1 (2017-02) 29

transmissions within a certain geographical range. The mechanism is such that the equipment adapts its transmission

behaviour dynamically based on how occupied the channel is at the moment.

NOTE: The DCC limits and mechanisms provided are based on IEEE 802.11-2012 [i.9i.9] but other technologies

need congestion control functionality.

The channel busy ratio (CBR) is used for determining the transmission behaviour. CBR is an estimate of how much a

single channel is used based on listening on surrounding radio transmitters. The determination of CBR for the

equipment shall be as performed according to Equation 1. Any other equivalent mechanism may be used providing a

CBR with a deviation of ± 3 %.

CBR =𝑇𝑏𝑢𝑠𝑦

𝑇𝐶𝐵𝑅 , (1)

Tbusy is the period of time in milliseconds when the strength of received signals over a period of TCBR exceeds -85 dBm.

TCBR is equal to 100 milliseconds.

Ton is the duration of a transmission by the equipment and Toff is the time interval between two consecutive

transmissions by the equipment.

Duty cycle is defined as the ratio, expressed as a percentage of the transmitter total "on" time on one carrier frequency,

relative to 1 second period.

4.2.10.2 Limits

The following limits apply:

0 < Ton ≤ 4 ms (2)

duty cycle ≤ 3 % (3)

If CBR is < 0,62, then Toff 25 ms (4)

If CBR is 0,62, then Toff 25 ms

and Toff min {1 000 ms, 𝑇𝑜𝑛 × (4 000 ×𝐶𝐵𝑅−0.62

𝐶𝐵𝑅− 1)} (5)

NOTE: The rationale behind Equation 5 is outlined in ETSI TS 103 175 [i.8i.8], Equation 1 in clause 7.2.



5 Testing for compliance with technical requirements

75.1 Conditions.1 Environmental conditions for testing

7.1.1 Normal and extreme test conditions

Tests defined in the present document shall be carried out under normal testat representative points within the boundary

limits of the declared operational environmental profile.

Where technical performance varies subject to environmental conditions and where stated, under the extreme test, tests

shall be carried out under a sufficient variety of environmental conditions as declared by the manufacturer(within the

boundary limits of the declared operational environmental profile) to give confidence of compliance for the affected

technical requirements.

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ETSI EN 302 571 V2.1.1 (2017-02) 30

7.1.2 Test modulation

The test modulation used should be representative of normal use of the equipment. Where the equipment is not capable

of continuous RF transmission, the test modulation shall be such that:

the generated RF signal is the same frame structure with random data for each transmission;

transmissions occur regularly in time;

sequences of transmissions can be repeated accurately.

The same test modulation shall be used for all measurements on the same equipment. For transmitters that have

multi-modulation schemes incorporated, the manufacturer shall declare the modulation scheme to be used for the tests.

The test transmissions shall be fixed in length in a sequence and shall exceed the transmitter minimum activity ratio of

10 %. The minimum duration of the sequence shall be adequate for the test purposes.

Implemented transmitter timeout functionality shall be disabled for the sequence of the test suite.

7.1.3 Presentation of equipment

Each equipment submitted for testing, where applicable, shall fulfil the requirements of the present document on all of

the nominal carrier frequencies as shown in table 2b over which it is intended to operate.

The provider shall provide one or more samples of the equipment, as appropriate for testing.

Additionally, technical documentation and operating manuals, sufficient to allow testing to be performed, shall be

supplied.

The performance of the equipment submitted for testing shall be representative of the performance of the corresponding

production model.

Equipment shall be offered by the provider complete with any ancillary equipment needed for testing. The provider

shall declare the frequency range(s), the range of operation conditions and power requirements, as applicable, in order

to establish the appropriate test conditions.

7Recommended environmental profile parameters are summarized in annex D.

5.2 Interpretation of the measurement results

The interpretation of the results recorded in a test report for the measurements described in the present document shall

be as follows:

the measured value related to the corresponding limit shall be used to decide whether an equipment meets the

requirements of the present document;

the value of the measurement uncertainty for the measurement of each parameter shall be included in the test

report;

the recorded value of the measurement uncertainty shall be, for each measurement, equal to or lowerless than

the figures in table 11Table 10.

For the test methods to determine RF power levels, according to the present document, the measurement uncertainty

figures shall be calculated in accordance with TR 100 028-1 [1] and TR 100 028-2 [1] and shall correspond to an

expansion factor (coverage factor) k = 1,96 or k = 2 (which provide confidence levels of respectively 95 % and 95,45 %

in the case where the distributions characterizing the actual measurement uncertainties are normal (Gaussian)).

Principles for the calculation of measurement uncertainty are contained in ETSI TR 100 028 [i.6i.6], in particular in

annex D of ETSI TR 100 028-2 [i.7i.7].

Table 1110 is based on such expansion factors.

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ETSI EN 302 571 V2.1.1 (2017-02) 31

Table 1110: Maximum measurement uncertainty

Parameter Uncertainty

RF frequency ±1 x 10-5 ppm

RF power conducted ±1,5 dB

RF power radiated ±6 dB

Humidity ±5 %

Temperature ±1 C

75.3 Essential radioRadio test suites

75.3.1 Product information

The following information is necessaryshall be declared by the manufacturer in order to carry out the test suites:. This

information shall be included in the test report.

the type of modulation used;

the operating nominal carrier frequency range(s) of the equipment;

the type of the equipment: integral antenna or dedicated antenna;

the extreme operating conditions that apply to the equipment;

the intended combination(s) of the radio equipment power settings and one or more antenna assemblies and

their corresponding e.i.r.p. spectral density levels;

the nominal operating voltages of the radio equipment or the nominal voltages of the host equipment (e.g. a

carvehicle or RSUroadside equipment);

the test modulation used in detail.

75.3.2 Carrier FrequenciesTransmitter frequency stability

75.3.2.1 Test conditionspurpose

These measurements shall be performedTo verify the required device under both normal and extremetest's (DUT)

transmitter frequency stability according to clause 4.2.1.

5.3.2.2 Test applicability

This test conditionsapplies to all types of DUT.

For a UUTDUTs with antenna connector(s) and usingtowards dedicated external antenna(s), or for a UUTDUTs with

integral antenna(s) but withproviding a temporary antenna connector provided, conducted measurements test procedure

shall be used.

For a UUTDUTs with integral antenna(s) and without a temporary antenna connectoronly, radiated measurementstest

procedure shall be used.

7.3.2.2 Test methods

75.3.2.2.1 Conducted measurement

This method is used with the UUT in operation in an modulated mode.

The UUT shall be connected to the spectrum analyser.

The settings of the spectrum analyser shall be adjusted to optimize the instruments frequency accuracy.

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ETSI EN 302 571 V2.1.1 (2017-02) 32

Max Hold shall be selected and the centre frequency adjusted to that of the UUT.

The peak value of the power envelope shall be measured and recorded. The span shall be reduced and the marker

moved in a positive frequency increment until the upper, (relative to the centre frequency), -10 dBc point is reached.

This value shall be noted as f1.

The marker shall then be moved in a negative frequency increment until the lower, (relative to the centre frequency),

-10 dBc point is reached. This value shall be noted as f2.

The centre frequency is calculated as (f1 + f2) / 2.

7.3.2.2.2 Radiated measurement

The test set up as described in annex B shall be used with a spectrum analyser of sufficient accuracy attached to the test

antenna.

The test procedure is as described under clause 7.3.2.2.1.

7.3.3 RF Output Power, Transmit Power Control (TPC) and Power Spectral Density (PSD)

7.3.3.1 Test conditionsdescription

These measurements shall be 5.3.2.3.1 Initial conditions

This test shall be performed for all nominal carrier frequencies according to Table 2 supported by the DUT.

The measurement is performed under bothwith the DUT in normal and extreme test conditions.

For a UUT with antenna connector(s) and using dedicated external antenna(s), or for a UUT with integral antenna(s) but

with a temporary antenna connector provided, conducted measurements shall be used.

For a UUT with integral antenna(s) and without a temporary antenna connector, radiated measurements shall be used.

7.3.3.2 Test method


7.3.3.2.1.1 RFoperation at maximum output power at the highest power level.

The UUT shall be configured to operate at the highest stated transmitter output power level of the TPC range.


The test procedure shall be as follow:

Step 1:

a) using suitable attenuators, the output power of the transmitter shall be coupled to a matched diode detector or

equivalent thereof. The output of the diode detector shall be connected to the vertical channel of an

oscilloscope;

b) the combination of the diode detector and the oscilloscope shall be capable of faithfully reproducing the duty

cycle of the transmitter output signal;

c) the observed duty cycle of the transmitter (Tx on/(Tx on + Tx off)) shall be noted as x (0 < x 1), and

recorded in the test report. For the purpose of testing, the equipment shall be operated with a duty cycle that is

equal to or greater than 0,1.

Connect the DUT transmitter output to the test setup and activate normal operation at the test centre frequency

of interest

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ETSI EN 302 571 V2.1.1 (2017-02) 33

Step 2:

a) the RF output power of the transmitter when operating at the highest power level shall be determined using a

wideband calibrated RF power meter with a matched thermocouple detector or an equivalent thereof and with

an integration period that exceeds the repetition period of the transmitter by a factor 5 or more. The observed

value shall be noted as "A" (in dBm);

b) the e.i.r.p. shall be calculated from the above measured power output A (in dBm), the observed duty cycle x,

and the stated antenna gain "G" in dBi, according to the formula in c). If more than one antenna assembly is

intended for this power setting or TPC range, the gain of the antenna assembly with the highest gain shall be

used;

c) PH = A + G + 10 log (1/x) (dBm);

PH shall be recorded inMeasure and record the DUT transmitter output carrier frequency

The measurement can be conducted as follows:

i) connect the DUT to a spectrum analyser;

ii) select Max Hold;

iii) adjust centre frequency to the same as the DUT;

iv) measure and record peak value of the power envelope;

v) reduce span and move marker in positive frequency increment until the upper (relative to the centre frequency)

-10 dBc point is reached;

vi) denote this value f1;

vii) move marker in negative frequency increment until the lower (relative to the centre frequency) -10 dBc point

is reached;

viii) denote this value as f2; and

ix) calculate centre frequency as (f1 + f2) / 2.


The test set up as described in annex B shall be used with a spectrum analyser (or alternative measurement instrument)

attached to the test antenna.


5.3.2.4 Test requirements

The measured carrier centre frequencies fc shall be within the range fc ± 20 ppm, i.e. within the limits according to

clause 4.2.2.2, including the measurement uncertainty according to Table 10.

5.3.3 RF output power, power spectral density and transmit power control

5.3.3.1 Test purpose

d) To verify the test report.

7.3.3.2.1.2 DUT transmitter RF output power ataccuracy, transmit power control capability and the lowest power

levelspectral density.

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ETSI EN 302 571 V2.1.1 (2017-02) 34

The UUT shall be configured to operate at 5.3.3.2 Test applicability

This test applies to all types of DUT.

For DUTs with antenna connector(s) towards dedicated external antenna(s), or for DUTs with integral antenna(s) but

providing a temporary antenna connector, conducted test procedure shall be used.

For DUTs with integral antenna(s) only, radiated test procedure shall be used.

5.3.3.3 Test description

5.3.3.3.1 Initial conditions

This test shall be performed for all nominal carrier frequencies according to Table 2 supported by the lowest stated

transmitterDUT.

The measurement is performed with the DUT in normal operation at requested output power level of the TPC range.




Step 1:

e) using suitable attenuators, the output power of the transmitter shall be coupled to a matched diode detector or

equivalent thereof. The output of the diode detector shall be connected to the vertical channel of an

oscilloscope;

f) the combination of the diode detector and the oscilloscope shall be capable of faithfully reproducing the duty

cycle of the transmitter output signal;

g) the observed duty cycle of the transmitter (Tx on/(Tx on + Tx off)) shall be noted as x (0 < x 1), and

recorded in the test report. For the purpose of testing, the equipment shall be operated with a duty cycle that is

equal to or greater than 0,1.

Connect the DUT transmitter output to the test setup and activate normal operation at the highest output power

level.

Step 2:

Measure the RF output powerduty cycle x of the DUT transmitter when operating at the lowest power level of

the TPC range shall be determined using a wideband calibrated RF power meter with a matched thermocouple

detector or an equivalent thereof and with an integration period that exceeds the repetition period .

The observed duty cycle of the transmitter by a factor 5 or more. (Ton / (Ton + Toff)) shall be noted as x (0 < x

1), and shall be recorded in the test report.

Step 3:

Measure DUT transmitter output power.

Step 4:

The observed value shall be noted as "A" (in dBm);) 1.

- theThe e.i.r.p. shall be calculated from the above measured power output power A (in dBm), the

observed duty cycle x, andwith the stated antenna gain "G" in dBi and the cable and connector losses L

in dB, according to the formula in c). P(e.i.r.p.) = A + L + G + 10 × log (1 / x) (dBm).

If more than one antenna assembly is intended for this TPC rangepower setting, the gain of the antenna

assembly with the highest gain shall be used;.

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ETSI EN 302 571 V2.1.1 (2017-02) 35

h) PL = A + G + 10 log (1/x) (dBm);

PLStep 5:

P(e.i.r.p.) shall be recorded in the test report. as highest output power level PH

75.3.3.3.2.1.32 Power Spectral Densityspectral density

The UUTtest procedure shall be operated as described in clause 7.3.3.2.follow:

Step 1.1. Furthermore, for:

Connect the purpose of this test,DUT transmitter output to the test setup and activate normal operation at

highest output power level. The minimum transmitter on-time shall be 10 s.

The transmitter shall be connected to the measuring equipment via a suitable attenuator and the power spectral density

as defined shall be measured and recorded.

The Step 2:

Measure the power spectral density shall be determined using a spectrum analyser of adequate bandwidth in

combination with an RF power meter.

Connect an RF power meter to the narrow IF output of the spectrum analyser and correct its reading using a known

reference source, e.g. a signal generator.

NOTE: The IF output of the spectrum analyser may be 20 dB or more below the input level of the spectrum

analyser. Unless the power meter has adequate sensitivity, a wideband amplifier may be required.

The test procedure shall be as follows:

Step 1:

a) the measurement set-up shall be calibrated with a CW signal from a calibrated source; the reference signal

shall be set to a level equal to the value for the applicable limit for e.i.r.p. spectral density (reduced by the

highest applicable antenna gain) and at a frequency equal to the centre frequency of the channel being tested;

b) the settings of the spectrum analyser shall be:

- centre Frequency: equal to the signal source;

- resolution BW: 1 MHz;

- video BW: 1 MHz;

- detector mode: positive peak;

- averaging: off;

- span: zero Hz;

- reference level: equal to the level of the reference signal.

Step 2:

a) the calibrating signal power shall be reduced by 10 dB and it shall be verified that the power meter reading

also reduces by 10 dB.

Step 3:

a) connect the UUT. Using the following settings of the spectrum analyser in combination with "max hold"

function, find the frequency of highest power output in the power envelope:

- centre Frequency: equal to operating frequency;

- resolution BW: no change to the setting in step 1;

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ETSI EN 302 571 V2.1.1 (2017-02) 36

- video BW: no change to the setting in step 1;

- detector mode: no change to the setting in step 1;

- averaging: no change to the setting in step 1;

- span: 1,5 times the spectrum width;

- reference level: no change to the setting in step 1;

b) the frequency found shall be recorded;

c) the centre frequency of the spectrum analyser shall be set to the recorded frequency, the span shall be further

reduced to 1 MHz and the frequency of the highest power output shall be found. If this frequency is different

from the previous recorded frequency, the new frequency shall be recorded.

Step 4:

a) set the centre frequency of the spectrum analyser to the found frequency and switch to zero span. The

power meter indicates the measured power density (D).. The mean power density e.i.r.p. is calculated from the

above measured power density (D), the observed duty cycle x (see clause 75.3.3.3.2.1.1 step 1, Step 2), and the

applicable antenna assembly gain "G" in dBi, according to the formula below. If more than one antenna

assembly is intended for this power setting or TPC range, the gain of the antenna assembly with the highest

gain shall be used:

- PD = D + G + 10 × log (1/ / x);

- PD PD (dBm/MHz) shall be recorded in the test report.

5.3.3.3.2.3 Transmit power control


Step 1:

Connect the DUT transmitter output to the test setup and activate normal operation at its minimum TPC output

power PM, with PM ≤ 3 dBm e.i.r.p. according to clause 4.2.4.2.

Step 2:

Measure the duty cycle x of the DUT transmitter.

The observed duty cycle of the transmitter (Ton / (Ton + Toff)) shall be noted as x (0 < x 1), and shall be

recorded in the test report.

Step 3:

Measure DUT transmitter output power.

Step 4:

The observed value shall be noted as A (in dBm).

- The e.i.r.p. shall be calculated from the measured output power A (in dBm), the observed duty cycle x,

with the stated antenna gain G in dBi and the cable and connector losses L in dB, according to P(e.i.r.p.)

= A + L + G + 10 × log (1 / x) (dBm).

If more than one antenna assembly is intended for this power setting, the gain of the antenna assembly with the

highest gain shall be used.

Step 5:

P(e.i.r.p.) shall be recorded in the test report as lowest output power level PL.

Step 6:

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ETSI EN 302 571 V2.1.1 (2017-02) 37

Increase the current DUT transmit power PT by 1 dB.

If PT < PH repeat Step 2 to Step 4, else the test is completed.

Step 7:

P(e.i.r.p.) shall be recorded in the test report as TPC output power level.

Continue with Step 6.



Test site described in annex B and applicable measurement procedures described in annex C shall be used for RF output

power measurements.

The test procedure is described in clause 5.3.3.3.2.1 except for that Step 4 shall be exchanged with the following:

The observed value shall be noted as A (e.i.r.p.) (in dBm).

- The e.i.r.p. shall be calculated from the measured output power A (e.i.r.p.) (in dBm) and the observed

duty cycle x, according to P(e.i.r.p.) = A (e.i.r.p) + 10 × log (1/x) (dBm).

5.3.3.3.3.2 Power spectral density

Test site described in annex B and applicable measurement procedures described in annex C shall be used for power

spectral density measurements.

The test procedure is described in clause 5.3.3.3.2.2 except for that Step 2 shall be exchanged with the following:

Measure the power spectral density D (e.i.r.p.). The mean power density e.i.r.p. is calculated from the

measured power density D (e.i.r.p.) and the observed duty cycle x (see clause 5.3.3.3.2.1, Step 2) according to

the following:

- PD = D (e.i.r.p.) + 10 × log (1/x);

- PD (dBm/MHz) shall be recorded in the test report.

The above procedure shall be repeated for each of the frequencies declared by the provider.

Where the spectrum analyser bandwidth is non-Gaussian, a suitable correction factor shall be determined and applied.

Where a spectrum analyser is equipped with a facility to measure power density, this facility may be used instead of the

above procedure to measure the power density across the occupied channel bandwidth.


In the case of radiated measurements, using a test site as5.3.3.3.3.3 Transmit power control

Test site described in annex B and applicable measurement procedures as described in annex C, the power spectral

density as defined shall be measured and recordedused for transmit power control measurements.

The test procedure is as described underin clause 75.3.3.3.2.3 except for that Step 4 shall be exchanged with the

following:

The observed value shall be noted as A (e.i.r.p.) (in dBm).

The e.i.r.p. shall be calculated from the measured output power A (e.i.r.p.) (in dBm) and the observed duty cycle x,

according to P(e.i.r.p.) = A (e.i.r.p) + 10 × log (1./x) (dBm).

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ETSI EN 302 571 V2.1.1 (2017-02) 38


The measured RF output power shall meet the limits specified in clause 4.2.2.2, the PSD shall meet the limits specified

in clause 4.2.3.2, and the TPC shall meet the limits specified in clause 4.2.4.2.

5.3.4 Transmitter unwanted emissions outside the 5 GHz ITS bandsfrequency band

75.3.4.1 Test conditionspurpose

The measurements shall be performed under normal test conditions. The UUT shall be configured to operate at the

highest stated power level.

To verify the DUT transmitter unwanted emissions outside the 5 GHz ITS frequency band.



For UUTDUT without an integral antenna and for a UUTDUT with an integral antenna but with a temporary antenna

connector, one of the following options shall be used:

a) the level of unwanted emissions shall be measured as their power in a specified load (conducted unwanted

emissions) and their radiated power when radiated by the cabinet or structure of the equipmentDUT with the

antenna connector terminated by a specified load (cabinet radiation); or

b) the level of unwanted emissions shall be measured as their radiated power when radiated by cabinet and

antenna.


antenna.

In the case where the UUTDUT has an integral antenna, but no temporary antenna connector, only radiated

measurements shall be used.

The measurements shall be conducted using a quasi-peak detector for frequencies below 1 GHz and a positive peak

detector on frequencies of 1 GHz and above.

75.3.4.23 Test methoddescription

75.3.4.2.13.1 Initial conditions


The measurement is performed with the DUT in normal operation at maximum output power.


The UUT shall be connected to a spectrum analyser capable of RF power measurements. The test procedure shall be as

followsfollow:

a) Step 1:

Connect the settings of DUT transmitter output to the test setup and activate normal operation at maximum

output power.

Step 2:

Initially the power level shall be measured in the ranges:

- 30 MHz to 1 000 MHz;

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ETSI EN 302 571 V2.1.1 (2017-02) 39

- with a resolution bandwidth of 1 MHz.

Step 3:

If any measurement is greater than the limit of -36 dBm then measurements shall be taken with a resolution

bandwidth of 100 kHz, at the 11 frequencies spaced 100 kHz apart in a band ±0,5 MHz centred on the failing

frequency.

EXAMPLE: A DUT fails at 495 MHz. Measurements are made in a 100 kHz bandwidth on 494,5 MHz;

494,6 MHz; 494,7 MHz; etc. up to 495,5 MHz.

Step 4:

The power level shall be measured in the ranges:

- 1 000 MHz to 5 855 MHz;

- 5 925 MHz to 18 GHz.

Step 5:

The e.i.r.p. shall be calculated from the measured emission level with the stated antenna gain in dBi and the

cable and the connector losses L in dB according to P (e.i.r.p.) = A – L + G.

- If more than one antenna assembly is intended for the power setting, the gain of the antenna assembly

with the highest gain shall be used.

The spectrum analyser shall be as followscan have the following settings:

sensitivityi) Sensitivity: at least 6 dB below the limits given in tables 5Tables 4 and 6a;5.

as a general rule, theii) The resolution bandwidth of the measuring receiver shouldmay be equal to the reference

bandwidth as given in clause 6. 4.2.5.1.2 for measurements above 1 GHz. To improve measurement accuracy,

sensitivity and efficiency, the resolution bandwidth can be different from the reference bandwidth. When the

resolution bandwidth is smaller than the reference bandwidth, the result should be integrated over the reference

bandwidth. When the resolution bandwidth is greater than the reference bandwidth, the result for broadband

spurious emissions should be normalized to the bandwidth ratio. For discrete spurious, normalization is not

applicable, while integration over the reference bandwidth is still applicable. The bandwidth used in this

measurement for each spurious emission shallcan be sufficiently narrow to reject emissions in any contiguous

channels centred on the channel on which the transmitter is intended to operate;.

videoiii) Video bandwidth:, not less than the resolution bandwidth;.

videoiv) Video averaging on, or peak hold;.

v) The video signal of the spectrum analyser shall beis "gated" such that the spectrum measured shall be

measured between 4,0 s before the startbeginning of the bursttransmission to 4,0 s after the end of the

bursttransmission.

NOTE: The "start of the burst" is the centre of the first sample of the preamble heading the burst. The "end of the

burst" is the centre of the last sample in the burst.

This gating may be analogue or numerical, dependent upon the design of the spectrum analyser:

b) initially the power level shall be measured in the ranges:

- 30 MHz to 1 000 MHz;

with a resolution bandwidth of 1 MHz and in a frequency scan mode;

c) if any measurement is greater than the limit of -36 dBm then measurements shall be taken with a resolution

bandwidth of 100 kHz, zero frequency scan, at the 11 frequencies spaced 100 kHz apart in a band ±0,5 MHz

centred on the failing frequency;

EXAMPLE: A UUT fails at 495 MHz. Measurements are made in a 100 kHz bandwidth on 494,5 MHz;

494,6 MHz; 494,7 MHz; etc. up to 495,5 MHz.

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ETSI EN 302 571 V2.1.1 (2017-02) 40

d) the power level shall be measured in the ranges:

- 1 GHz to 5,795 GHz;

- 5,965 GHz to 18 GHz;

in a frequency scan mode;

e) the power level shall be measured in the range:

- 5,795 GHz to 5,855 GHz;

- 5,925 GHz to 5,965 GHz;

- and with zero frequency span.

7.3.4.2.23.3 Radiated measurement

The test set up as described in annex B shall be used with a spectrum analyser of sufficient accuracy(or alternative

measurement instrument) attached to the testmeasurement antenna.



The test procedure is as described under clause 75.3.4.2.1.3.2 except for Step 5 which shall be exchanged with the

following:

7The observed value shall be noted as A (e.i.r.p.) (in dBm).


The measured unwanted emissions shall meet the limits according to clause 4.2.5.1.2.

5.3.5 Transmitter spectrum mask within the 5 GHz ITS frequency band for 10 MHz channel spacing

5.3.5.1 Test Purpose

To verify the DUT transmitter unwanted emissions within the 5 GHz ITS bandsfrequency band.

75.3.5.12 Test conditionsapplicability

The measurements shall be performed under normal test conditions. The UUT shall be configured to operate at the

highest stated power level.


For UUTDUT without an integral antenna and for a UUTDUT with an integral antenna but with a temporary antenna

connector, one of the following options shall be used:

a) the level of unwanted emissions shall be measured as their power in a specified load (conducted unwanted

emissions) and their radiated power when radiated by the cabinet or structure of the equipmentDUT with the



antenna.

c) the level of unwanted emissions shall be measured as their radiated power when radiated by cabinet and

antenna.

In the case where the UUTDUT has an integral antenna, but no temporary antenna connector, only radiated

measurements shall be used.

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ETSI EN 302 571 V2.1.1 (2017-02) 41

7.3.5.23.5.3 Test methoddescription



The measurement is performed with the DUT in normal operation at maximum output power.


The settings of the spectrum analysertest procedure shall be as follows:follow:

resolution bandwidth: 1 MHz;

video bandwidth: 30 kHz;

video averaging onStep 1:

Connect the DUT transmitter output to the test setup and activate normal operation at maximum output power.

Step 2:

Measure the average power in the transmission bandwidth (fc ± 4,5 MHz) using a resolution bandwidth of

100 kHz. This shall be recorded as the "Power Spectral Density at the carrier centre frequency fc" according to

Table 6.

Step 3:

Measure the power level in the range of fc ± 15 MHz with a resolution bandwidth of 100 kHz and record these

values.

The video signal of the spectrum analyser shallcan be "gated" such that the spectrum measured shall beis

measured between 4,0 s before the startbeginning of the bursttransmission to 4,0 s after the end of the

bursttransmission.

NOTE: The "start of the burst" is the centre of the first sample of the preamble heading the burst. The "end of the

burst" is the centre of the last sample in the burst.

This gating may be analogue or numerical, dependent upon the design of the spectrum analyser.

Determination of the reference average power level:

The spectrum analyser shall be tuned to measurement frequencies at every 1 MHz interval within fc - 4 MHz to

fc + 4 MHz, with zero frequency scan. The maximum average power within fc - 4 MHz to fc + 4 MHz (except fc) is the

reference level for relative power measurements on the channel centred at fc and shall be recorded to compute relative

power levels as described below.

Determination of the relative average power levels:

The power level shall be measured in the range from 5 855 MHz to 5 925 MHz excluding the interval

fc - 4 MHz to fc + 4 MHz with a resolution bandwidth of 1 MHz and in a frequency scan mode. The average value of

power relative to the reference average power level for the channel shall be recorded.

7.3.5.2.25.3.5.3.3 Radiated measurement

The test set up as described in annex B shall be used with a spectrum analyser of sufficient accuracy(or alternative

measurement instrument) attached to the test antenna.

The test procedure is as described under clause 7.3.5.2.1.5.3.5.3.2 except that a Step 4 is added:

7The observed value shall be noted as A (e.i.r.p.) (in dBm).

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ETSI EN 302 571 V2.1.1 (2017-02) 42


The measured conducted unwanted emissions shall meet the limits according to clause 4.2.5.2.2. The measured radiated

unwanted emissions shall meet the limits according to clause 4.2.5.2.2 plus the influence of the integrated antenna of

the DUT.

5.3.6 Receiver spurious emissions

75.3.6.1 Test conditionsPurpose

The measurement shall be performed under normalTo verify the DUT receiver spurious emissions.


This test conditionsapplies to all types of DUT.

For UUT without an DUTs with antenna connector(s) towards dedicated external antenna(s), or for DUTs with integral

antenna and for a UUT with an integral antenna(s) but withproviding a temporary antenna connector, one of the

following optionsconducted test procedure shall be used:.

a) the level of spurious emissions shall be measured as their power in a specified load (conducted spurious

emissions) and their radiated power when radiated by the cabinet or structure of the equipment with the


b) the level of spurious emissions shall beFor DUTs with integral antenna(s) only, radiated test procedure shall be

used.



The measurement is performed with the DUT in receive mode. This test shall be performed for all nominal carrier

frequencies according to Table 2 supported by the DUT.



Step 1:

Connect the DUT transmitter output and the DUT receiver input to the test setup and activate normal operation

at maximum output power.

Step 2:

Activate a test transmission towards the DUT receiver at a power level of -60 dBm at the receiver input.

The settings of the spectrum analyser can be as follows:

i) frequency scan allowed;

ii) resolution bandwidth: 1 MHz or 100 kHz;

iii) video bandwidth: 1 MHz; and

iv) video averaging on, or peak hold.

Step 3:

Measure the power level of DUT emissions during test transmissions, in the frequency range specified in

Table 7.

Step 4:

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ETSI EN 302 571 V2.1.1 (2017-02) 43

The e.i.r.p. shall be calculated from the measured as their radiated power when radiated by cabinet and antenna.

In the case where the UUT has an integral antenna, but no temporaryemission level with the stated antenna

gain G in dBi and the cable and connector, only radiated measurements shall be used. losses L in dB

according to P (e.i.r.p.) = A – L + G.

- If more than one antenna assembly is intended for the power setting, the gain of the antenna assembly

with the highest gain shall be used.


The test set up as described in annex B shall be used with a spectrum analyser (or alternative measurement instrument)

attached to the measurement antenna.



7.3.6.2 Test method


Using a directional coupler, circulator or gating to remove the test transmissions (and/or other means to isolate the

emissions measurements instrument from the test data signals transmitted) the radio emissions from the UUT shall be

measured while the UUT receives test data.

The settings of the spectrum analyser shall be as follows:

frequency scan allowed;

resolution bandwidth: 1 MHz or 100 kHz;

video bandwidth: 1 MHz;

video averaging on, or peak hold.

Tuning the spectrum analyser centre frequency over the measurement frequency bands specified in table 8, the power

level of UUT receiver emissions shall be measured during test transmissions. If gating is used to remove the unwanted

energy from the test data transmissions, the tuning of the spectrum analyser shall not change during the gated-out time

interval.


The test set up as described in annex B shall be used with a spectrum analyser of sufficient accuracy attached to the test

antenna.


7.3.7 Receiver LBT threshold

76.3.7.1 Test conditions

This measurement shall be conducted under normal conditions.

7.3.7.2 Test method

A signal generator and a power meter are each combined via appropriate attenuators into the equipment antenna

connector. The test set-up in figure 1 shall be used2 except for conducted measurements.

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ETSI EN 302 571 V2.1.1 (2017-02) 44

Figure 1: Conducted measurement arrangement

For equipment with integral antenna the connection to the equipment can be made to a temporary 50 antenna

connector.

In addition:

a) the LBT function of the transceiver shall be active;

b) the attenuator shall provide sufficient attenuation to protect the signal generator from burn-out by the

transmitter of the transceiver;

c) the signal generator with normal test modulation shall be adjusted to the receiving frequency. The level shall

be increased to approximately 20 dB above the receiver sensitivity;

d) the equipment shall be switched to an intended transmit mode;

NOTE: The equipment is not transmitting because the transceiver recognizes a busy channel from the signal

generator.

e) the level of the signal generator shall be reduced in steps of 1 dB until the equipment starts to transmit. This

specific signal generator level present at the receiver input of the transceiver is the LBT threshold;

The level of the received LBT threshold shall be recorded in the test report.

f) the steps c) and e) shall be repeated over all carrier frequencies.

The limit for total listen time for the receiver for the LBT check shall not exceed 8 µs in a 10 MHz channel and Step 4

µs in a 20 MHz channel. Thiswhich shall be declared byexchanged with the provider and recorded in the test report.

following:

Alternatively, equipment having The observed value shall be noted as A (e.i.r.p.) (in dBm).

5.3.6.4 Test requirement

The measured unwanted emissions shall meet the limits according to clause 4.2.6.2.

If the limits in the band 5 795 MHz to 5 815 MHz are exceeded the following steps shall be taken:

1) Provide the attenuation value of the intended connecting cabling between the device output and the antenna, L.

2) Provide the maximum antenna gain in the vertical direction -50° ≤ ϴ ≤ +70°, G. The vertical direction is

defined as 0° upwards, and +90° is in the forward direction of the vehicle where the antenna under test is

intended to be used.

3) Calculate the receiver spurious emission levels at the antenna in the direction of the potential CEN DSRC and

the HDR DSRC road side unit by using the maximum measured value obtained from the measurement in

clause 5.3.6.3.2 in the band 5 795 MHz to 5 815 MHz, PRXmax and add the cable and connector losses L from

Step 1 and the antenna gain G in dBi from Step 2.

4) The resulting value PRXres (= PRXmax + G - L) shall meet the limits outlined in clause 4.2.6.2.

Signal generator

RF-detector

Combiner

Attenuator

Transceiver

Oscilloscope

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ETSI EN 302 571 V2.1.1 (2017-02) 45

5.3.7 Receiver selectivity


To verify that the DUT operates satisfactorily in the presence of a signal in the adjacent channel.

To verify that the DUT operates satisfactorily in the presence of a signal in the alternate adjacent channel.

To verify that the DUT operates satisfactorily in the presence of a signal in a frequency band further away for testing

the blocking functionality.



For DUTs with antenna connector(s) towards dedicated external antenna(s), or for DUTs with integral antenna may use

a (s) but providing a temporary antenna connector, conducted test procedure shall be used.

For DUTs with integral antenna(s) only, radiated measurement setup. For this, a test site from annex B shall be selected

and the requirements from annexes B and C apply.

Signal generators A and B together with a combiner shall be placed outside the anechoic chamber and a TX test antenna

shall be placed with the EUT's antenna polarisation. The EUT shall be placed at the location of the turntable at the

orientation of the most sensitive position.

The test procedure shall be the same as for the conducted measurementused.

7.3.8 Receiver blocking or desensitization


5.3.7.3.8.1 TestInitial conditions

This measurement shall be conducted under normal conditions. test shall be performed for all nominal carrier

frequencies according to Table 2 supported by the DUT.

7.3.8.2 Test method

The test set-up in figure 2 shall be used for performing conducted measurements.

Signal generator B

Combiner

Receiver

Signal generator A Power meter

Figure 2: The measurement is performed with the DUT in normal operation.

5.3.7.3.2 Conducted measurement arrangement

Two signal generators A and B shall be connected to the receiver via a combining network to the receiver antenna

connector. For equipment with integral antenna the connection to the equipment can be made to a temporary 50

antenna connector for performing a conducted measurement.

ETSI

ETSI EN 302 571 V2.1.1 (2017-02) 46

Signal generator A shall beThe test procedure shall be as follow:

Step 1:

Connect the DUT receiver to the output of the test system.

Step 2:

Activate a test transmission from the test system at the carrier frequency of the receiver, DUT, at a level

adjusted +3 dB above the sensitivity limit from Table 9 at the receiver input. Use the modulation scheme as

declared by the manufacturer of the DUT.

Step 3:

Activate a second signal with normal modulation of the wanted signal. Signal generator B shall be

unmodulated and shall be adjusted to a test frequencies of approximatelyat +10 MHz relative to the carrier

frequency of the receiver. Initially signal generator B shall be switched off and using signal generator A at a

level adjusted +, at a power level relative to the test transmission of < 16 dB above the LBT threshold. .

Signal generator B is then switched on and adjusted until the wanted criteria, i.e. after demodulation, a message

acceptance ratio of 90 % is just exceeded.

With signal generator B settings unchangedStep 4:

Increase the power into the receiver is measured by replacing the receiver with a power meter. This level shall be

recorded.

The tests shall be repeated with of the frequency ofsecond signal generator B at approximately -10 MHz from the

carrier frequency of the receiver.

Alternatively, equipment having a dedicated or integral antenna may use a radiated measurement setup. For this, a test

site from annex B shall be selected and the requirements from annexes B and C apply.

Signal generators A and B together with a combiner shall be placed outside the anechoic chamber and a TX test antenna

shall be placed with the EUT's antenna polarisation. The EUT shall be placed at the location of the turntable at the

orientation of the most sensitive position.

The procedure shall be the same as for the conducted measurement.

ETSI

ETSI EN 302 571 V2.1.1 (2017-02) 47

7.3.9 Receiver adjacent channel rejection

7.3.9.1 Test conditions

This measurement shall be conducted under normal conditions.

7.3.9.2 Test method

The following test set-up shall be used for conducted measurements.

Signal Generator

A

Signal Generator

B

Combiner

DUT

Figure 3: Conducted measurement arrangement

For this test the adjacent channel reception is performed for a specific reception rate. This inherently defines the FEC

for the specific rate. The values specified in table 10a are for BPSK rate ½. This rate shall be used for the tests under

this clause.

Two signal generators A and B shall be connected to the receiver via a combining network to the receiver antenna

connector.

For equipment with integral antenna the connection to the equipment is made either to a temporary antenna connector,

or alternatively, a radiated measurement may be performed.

Signal generator A shall be at the nominal frequency of the receiver, with normal test modulation of the wanted signal.

Signal generator B shall be also with normal test modulation and shall be adjusted to the adjacent channel center

frequency immediately above the wanted channel as shown in figure 4.i.e. at a 10 MHz frequency offset.

fc

Lower

Alternate

Upper

AlternateLower

Adjacent

Upper

Adjacent

Wanted

Channel

Figure 4: Adjacent and alternate adjacent channel definitions

ETSI

ETSI EN 302 571 V2.1.1 (2017-02) 48

Initially signal generator B shall be switched off and using signal generator A the level which still gives sufficient

response shall be established, however, the level at the receiver input shall not be below the sensitivity limit of

-85 dBm. The output level of generator A shall then be increased by 3 dB.

Signal generator B is then switched on and the signal amplitude is adjusted until the wanted performance

criteria is just exceeded, i.e. the level of the input signal to the receiver is adjusted until the bitpacket error

ratio is 10-21 or greater.

With signal generator B settings unchanged the power into the receiver is measured by replacing the receiver with a

power meter or a spectrum analyzer. This power level shall be recorded.

The measurements shall be repeated immediately below the wanted channel for the Step 5:

Record the relative and absolute power levels of the second signal.

Step 6:

Repeat Step 3 to Step 5 but for a second signal at lower adjacent channel at -10 MHz relative to the carrier

frequency offset and thenof the receiver.

Step 7:

Repeat Step 3 to Step 5 but for the a second signal at alternate adjacent channels at 20 -20 MHz and +20 MHz

relative to the carrier frequency of the receiver.

Step 8:

Repeat Step 3 to Step 5 but for a second unmodulated signal for at least six frequency offset points to test the

blocking capability of the DUT. Frequency offset points shall be ±50 MHz frequency offset, ±100 MHz, and

±200 MHz, relative to the carrier frequency but are not limited to those.

For special protection requirements for the receiver it maycan be necessary to determine the receiver saturation. In this

case the above measurements are repeated with a +25 dB increased level for the signal generator A.

For radiated

Σ

Test transmission

Rx UUT

Second signal

Figure 3: A possible conducted measurement signal generators A and B together with a combiner arrangement


A test site from annex B shall be placed outside selected and the anechoic chamber and a TX test antennatest setup from

annex B and annex C apply. The procedure shall be placed with the EUT's antenna polarisation. The EUT shall be

placed at the locationsame as for the conducted measurement. Adjust the power level of the turntable atinput signals by

removing the orientationinfluence of the most sensitive position. DUT integrated antenna.

Receiver adjacent channel rejection is the difference between signal generator B and signal generator A levels.

7.3.10 Void

Figure 5: Void

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ETSI EN 302 571 V2.1.1 (2017-02) 49

7.5.3.7.4 Test requirement

The conducted receiver selectivity parameters under specified conditions shall be equal to or greater than the limits

given in clause 4.2.7.2. The radiated receiver selectivity shall be equal to or greater than the limits given in

clause 4.2.7.2, where the limits effectively represent values at the antenna connector.

5.3.118 Receiver sensitivity


To verify that the minimum receive signal level of the DUT fulfils the requirements.




providing a temporary antenna connector, conducted test procedure shall be used.




The measurement shall be performed under normal test conditions only.

For a UUT without an integral antenna and for a UUT with an integral antenna but with a temporary antenna connector,

conducted or radiated measurements shall be used.

For a UUT with an integral antenna radiated measurements shall be used.

7This test shall be performed for all nominal carrier frequencies according to Table 2 and all modulations and coding

rates according to Table 9, supported by the DUT.

The measurement is performed with the DUT in normal operation.

5.3.11.2 Test method


The proposed test setup is shown in figure 6. An ITS-G5 transmitter with fixedtest procedure shall be as follow:

Step 1:

Connect the DUT receiver to the output power of the test system.

Step 2:

Activate a test transmission from the test system at the carrier frequency of the DUT, at a level is used as

signal generator. The instantaneous outputadjusted to reference sensitivity + 5 dB at the receiver input.

Step 3:

Reduce the power level is monitored with an RF-detector. The receiveuntil the packet error rate PER is 10-1.

Step 4:

Record the power level is adjusted with a step attenuatorin the test report.

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ETSI EN 302 571 V2.1.1 (2017-02) 50

Figure 6: Proposal for a conducted sensitivity measurement setup

The transmitter shall use a frame size of 1 000 octets. The packet error rate PER is calculated from the number

of sent packets PktTx and the number of correctly received packets PktRx as shown in (1).Equation (6). At least

1 000 frames shall be used for evaluating the PER.

%100

Tx

RxTx

Pkt

PktPktPER (16)

Figure 7: Proposal for a substitution setup for conducted sensitivity measurement setup

The test setup shall be calibrated with a substitution measurement equivalent to the one shown in figure 7.

The sensitivity measurement shall be performed by reducing the step attenuator value until the PER gets better than

10 %.

At least 1 000 frames shall be used for evaluating the PER.

75.3.11.2.28.3.3 Radiated measurement

Figure 8: Proposal for a substitution setup for radiated sensitivity measurements

TransmitterUUT

(Receiver)

RF-detector

Oscilloscope

Directional

coupler

Step attenuator

Signal

generator

Power

meter

RF-detector

Oscilloscope

Directional

coupler

Step attenuator

Signal

generator

Power

meter

RF-detector

Oscilloscope

Directional

coupler

Step attenuator

Transmit

antenna

Receive

antenna

Far-field region &

free space condition

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ETSI EN 302 571 V2.1.1 (2017-02) 51

Figure 9: Proposed setup for radiated sensitivity measurements

TheA test setup for radiated measurement of the receiver sensitivity is similar to the conducted measurement, as can be

seen in figure 9. The calibration of the site from annex B shall be selected and the test setup shall be done by a

substitution measurement equivalent to figure 8.

The test from annex B and annex C apply. The procedure shall be the same as for conducted measurements as described

in clause 7.3.6.2.1the conducted measurement. Correct the measured values of sensitivity by subtracting influence of

the DUT integrated antenna.

7.3.12 CEN DSRC protection

75.3.12.18.4 Test conditions

The test shall be performed under normal conditions.

7.3.12.2 Test method

The equipment supplier shall declare which coexistence methods are implemented. The DCR method shall be tested by

monitoring the ITS-G5 output power level with a time resolution of 100 µs and a power level accuracy of ±1 dB under

different simulated ITS-G5 station densities. Muting, power regulation, and any combination of DCR with them shall be

tested by emulation.

TransmitterUUT

(Receiver)

RF-detector

Oscilloscope

Directional

coupler

Step attenuator

Transmit

antenna

Receive

antenna

Far-field region &

free space condition

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ETSI EN 302 571 V2.1.1 (2017-02) 52

Annex A (normative): HS Requirements and conformance Test specifications Table (HS-RTT)

The HS Requirements and conformance Test specifications Table (HS-RTT) in table A.1 serves a number of purposes,

as follows:

it provides a statement of all the requirements in words and by cross reference to (a) specific clause(s) in the

present document or to (a) specific clause(s) in (a) specific referenced document(s);

it provides a statement of all the test procedures corresponding to those requirements by cross reference to (a)

specific clause(s) in the present document or to (a) specific clause(s) in (a) specific referenced document(s);

it qualifies each requirement to be either:

- Unconditional: meaning that the requirement applies in all circumstances; or

- Conditional: meaning that the requirement is dependant on the manufacturer having chosen to support

optional functionality defined within the schedule.

in the case of Conditional requirements, it associates the requirement with the particular optional service or

functionality;

it qualifies each test procedure to be either:

- Essential: meaning that it is included with the Essential Radio Test Suite and therefore the requirement

shall be demonstrated to be met in accordance with the referenced procedures;

Other: meaning that the The conducted receiver sensitivity under specified conditions shall be equal to or better than the

limits given in clause 4.2.8.2. The radiated receiver sensitivity shall be equal to or greater than the limits given in clause

4.2.8.2, where the limits effectively represent values at the antenna connector.

5.3.9 CEN DSRC and HDR DSRC protection


To verify the DUT CEN DSRC and HDR DSRC protection.



Test of RF output power shall be performed according to clause 5.3.3.

Test of RF unwanted emissions shall be performed according to clause 5.3.4.





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ETSI EN 302 571 V2.1.1 (2017-02) 53

5.3.9.3.2 Measurement of RF output power, unwanted emissions, and transmit duty cycle in coexistence mode

The test procedure shall be as follows:

Step 1:

Connect the DUT transmitter to the test setup.

Step 2:

The manufacturer shall declare which co-existence modes according to ETSI TS 102 792 [1], Table 5.3 the

DUT is supporting. The DUT shall be tested with all supported co-existence modes.

Step 3:

The DUT shall be in one of the co-existence mode A, B, C or D.

Step 4:

If measurement results of DUT according to clause 5.3.4 shows unwanted emissions in normal mode are less

than the limits according to coexistence mode A in ETSI TS 102 792 [1], Table 5.3, it is not necessary to

measure unwanted emissions in coexistence mode.

Step 5:

If measurement results of DUT according to clause 5.3.3 shows maximum output power in normal mode are

less than the limits according to coexistence mode A in ETSI TS 102 792 [1], Table 5.3, it is not necessary to

measure maximum output power in coexistence mode.

Step 6:

If coexistence modes C and/or co-existence mode D are supported, connect a test signal generator to the DUT

receiver that can simulate up to twelve surrounding ITS stations. The DUT shall be tested receiving zero, six

and twelve surrounding ITS stations.

Step 7:

Measure the RF output power according to clause 5.3.3. Record these values.

Step 8:

Measure the unwanted emissions according to clause 5.3.4. Record these values.

Step 9:

Measure Ton and Toff. Record these values.


The measured RF output power level, timings and unwanted emissions in clause 5.3.9.3 shall meet the limits according

to clause 4.2.9.2.

5.3.10 CEN DSRC and HDR DSRC detection


To verify the DUT CEN DSRC and HDR DSRC detection.

5.3.10.2 Initial conditions


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ETSI EN 302 571 V2.1.1 (2017-02) 54

5.3.10.3 Test of detecting CEN DSRC and HDR DSRC transmissions

5.3.10.3.1 Test purpose

To verify the DUT's CEN DSRC and HDR DSRC detector.

5.3.10.3.2 Test applicability

This test applies to all DUTs that have implemented a short-range RF detector, see ETSI TS 102 792 [1], in

clause 5.2.5.

5.3.10.3.3 Test description

The test procedure is illustrativeshall be as follows:

Step 1:

Connect the DUT to the test setup and activate normal mode (not any of the co-existence modes A, B, C or D)

transmitting CAM.

Step 2:

Connect the DUT to a test signal receiver that can receive and analyse CAM, see ETSI EN 302 637-2 [2].

Step 3:

Connect the DUT to a test generator transmitting CEN DSRC frame headers as defined in CEN EN 12253 [5].

If no antenna is used, the signal generator shall be connected to the DUT antenna connector and the power

level shall be compensated with the declared antenna gain.

Step 4:

Set the CEN DSRC test generator to send messages with a signal power level at the DUT antenna of 3 dB

greater than the upper limit in ETSI TS 102 792 [1], clause 5.2.5.

Step 5:

Receive the DUT transmitted CAMs. Analyse the information regarding CEN DSRC protected zone. There

shall be protected zone information included in the CAM.

Step 6:

Measure the RF output power and unwanted emissions using the test setup in clause 5.3.9. The DUT shall

activate coexistence mode when receiving CEN DSRC transmissions.

Step 7:

Set the CEN DSRC test generator to send messages with a signal power level at the DUT antenna of 3 dB less

than the lower limit in ETSI TS 102 792 [1], clause 5.2.5.

Step 8:

Receive the DUT transmitted CAMs for 10 seconds. Analyse the information regarding CEN DSRC protected

zone. There shall be no protected zone information included in the CAM.

Step 9:

Replace the CEN DSRC test signals with HDR DSRC wakeup trigger signals as defined in in ETSI

ES 200 674-1 [6], clause 6.8.6.

Step 10:

Set the HDR DSRC test generator to send messages with a signal power level at the DUT antenna of 3 dB

greater than the upper limit in ETSI TS 102 792 [1], clause 5.2.5.

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ETSI EN 302 571 V2.1.1 (2017-02) 55

Step 11:

Receive the DUT transmitted CAMs. Analyse the information regarding HDR DSRC protected zone. There

shall be protected zone information included in the CAM.

Step 12:

Measure the RF output power and unwanted emissions using the test setup in clause 5.3.9. The DUT shall

activate coexistence mode when receiving HDR DSRC transmissions.

Step 13:

Set the HDR DSRC test generator to send messages with a signal power level at the DUT antenna of 3 dB less

than the lower limit in ETSI TS 102 792 [1], clause 5.2.5.

Step 14:


zone. There shall be no protected zone information.

Step 15:

Set the test generator to send non CEN DSRC or HDR DSRC messages with a signal power level at the DUT

antenna of -30 dBm LP.

Step 16:


zone. There shall be no protected zone information included in the CAM.

5.3.10.3.4 Test requirements

The limits defined in clause 4.2.9.2 shall be fulfilled.

5.3.11 Decentralized congestion control


To verify that the DUT can assess CBR and respect DCC limits.




otherproviding a temporary antenna connector, conducted test procedure shall be used.




The measurement shall be performed under normal test conditions only.

This test shall be performed for all nominal carrier frequencies according to Table 2.

ETSI

ETSI EN 302 571 V2.1.1 (2017-02) 56



Step 1:

Connect the DUT receiver to the output of the test system.

Step 2:

Activate the DUT to transmit with 10 times per second with a Ton selected between 0,9 ms to 1,1 ms at the

selected carrier frequency. Keep the same Ton value throughout the test.

Step 3:

Activate the test system to transmit with 100 times per second a Ton test system selected between 0,9 ms to

1,1 ms at the carrier frequency of the DUT. Keep the same Ton test system value throughout the test.

Step 4:

Record the Ton value of the DUT in the test report.

Step 5:

Record the Toff value of the DUT in the test report.

Step 6:

Repeat Step 3 to Step 5 when the test system transmits with Mrate 300, 600, 650, 700, 750, and 800 times per

second.

Step 7:

Calculate the CBR that is produced by the test system according to Equation (7) in clause 4.2.10.2. for each of

the given message rates Mrate from Step 3 and Step 6.

𝐶𝐵𝑅 =𝑇𝑏𝑢𝑠𝑦

𝑇𝐶𝐵𝑅= 𝑀𝑟𝑎𝑡𝑒 × 𝑇𝑜𝑛 𝑡𝑒𝑠𝑡 𝑠𝑦𝑠𝑡𝑒𝑚 (7)

NOTE: The CBR generated by the test system will vary for different Ton times at one fixed number of

transmissions per second.


A test site from annex B shall be selected and the test setup from annex B and annex C apply. The procedure shall be

the same as for the conducted measurement.

5.3.11.4 Test requirement

The DCC under specified conditions shall be equal to or better than the limits given in clause 4.2.10.2.

ETSI

ETSI EN 302 571 V2.1.1 (2017-02) 57

Annex A (informative): Relationship between the present document and the essential requirements of Directive 2014/53/EU

The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.5i.5] to

provide one voluntary means of demonstratingconforming to the essential requirements of Directive 2014/53/EU on the

harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and

repealing Directive 1999/5/EC [i.4i.4].

Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with

the requirement are permittednormative clauses of the present document given in Table A.1 confers, within the limits of

the scope of the present document, a presumption of conformity with the corresponding essential requirements of that

Directive, and associated EFTA regulations.

Table A.1: HS Requirements and conformance Test specifications Table (HS-RTT)

Table A.1: Relationship between the present document and the essential requirements of Directive 2014/53/EU

Harmonized Standard EN 302 571

The following requirements and test specifications are relevant to the presumption of conformity under the article 3.2 of the R&TTE Directive [i.2]

Requirement Requirement Conditionality Test Specification

No Description Reference: Clause No

U/C Condition E/O Reference: Clause No

1 Carrier Frequencies 6.2 U E 7.3.2

2 RF output power, Transmit Power Control (TPC) and Power Spectral Density (PSD)

6.3 U E 7.3.3

3 Transmitter unwanted emissions outside the 5 GHz ITS frequency bands

6.4.1 U E 7.3.4

4 Transmitter unwanted emissions within the 5 GHz ITS frequency bands

6.4.2 U E 7.3.5

5 Receiver spurious emissions

6.5 U E 7.3.6

6 Listen Before Talk threshold

6.6 C Applies only for equipment operating in the frequency range from 5 855 MHz to 5 875 MHz

E 7.3.7

7 Receiver blocking or desensitization

6.7 C Applies only for equipment operating in the frequency range from 5 855 MHz to 5 875 MHz

E 7.3.8

8 Receiver adjacent channel rejection

6.8 U E 7.3.9

9 Transient Power 6.9 U E 7.3.10

10 Receiver sensitivity 6.10 U E 7.3.11

11 CEN DSRC protection 6.11 U E 7.3.12

Harmonised Standard ETSI EN 302 571

Requirement Requirement Conditionality

ETSI

ETSI EN 302 571 V2.1.1 (2017-02) 58

No Description Reference: Clause No

U/C Condition

1 Transmitter frequency stability 4.2.1 U

2 RF output power 4.2.2 U

3 Power spectral density 4.2.3 U

4 Transmit power control 4.2.4 U

5 Transmitter unwanted emissions 4.2.5 U

6 Receiver spurious emissions 4.2.6 U

7 Receiver selectivity 4.2.7 U

8 Receiver sensitivity 4.2.8 U

9 Interference mitigation for CEN DSRC and HDR DSRC in the frequency band 5 795 MHz to 5 815 MHz

4.2.9 U

10 Decentralized congestion control 4.2.10 U

Key to columns:

Requirement:

No A unique identifier for one row of the table which may be used to identify a requirement or its test

specification.

Description A textual reference to the requirement.

Clause Number Identification of clause(s) defining the requirement in the present document unless another

document is referenced explicitly.

Requirement Conditionality:

U/C Indicates whether the requirement is to be unconditionally applicable (U) or is conditional upon

the manufacturersmanufacturer's claimed functionality of the equipment (C).

Condition Explains the conditions when the requirement shallis or shallis not be applicable for a technical

requirement which is classified "conditional".

Test Specification:

E/O Indicates whether the test specification forms part of the Essential Radio Test Suite (E) or whether

it is one of the Other Test Suite (O).

NOTE: All tests whether "E" or "O" are relevant to the requirements. Rows designated "E" collectively make up

the Essential Radio Test Suite; those designated "O" make up the Other Test Suite; for those designated

"X" there is no test specified corresponding to the requirement. The completion of all tests classified "E"

as specified with satisfactory outcomes is a necessary condition for a presumption of conformity.

Compliance with requirements associated with tests classified "O" is a necessary condition for

presumption of conformity, although conformance with the requirement may be claimed by an equivalent

test or by manufacturer's assertion supported by appropriate entries in the technical construction file.

Clause Number Identification of clause(s) defining the test specification in the present document unless another

document is referenced explicitly. Where no test is specified (that is, where the previous field is

"X") this field remains blank.

Presumption of conformity stays valid only as long as a reference to the present document is maintained in the list

published in the Official Journal of the European Union. Users of the present document should consult frequently the

latest list published in the Official Journal of the European Union.

Other Union legislation may be applicable to the product(s) falling within the scope of the present document.

ETSI

ETSI EN 302 571 V2.1.1 (2017-02) 59

Annex B (normative): Test sites and arrangements for radiated measurements

B.1 Test sites

B.1.1 Open air test sites

The term "open air" should be understood from an electromagnetic point of view. Such a test site may be really in open

air or alternatively with walls and ceiling transparent to the radio waves at the frequencies considered.

An open air test site may be used to perform the measurements using the radiated measurement methods described in

clause 5. Absolute or relative measurements may be performed on transmitters or on receivers; absolute measurements

of field strength require a calibration of the test site. Above 1 GHz, measurements should be done in anechoic

conditions. This may be met by semi anechoic sites provided reflections are avoided.

For measurements at frequencies below 1 GHz, a measurement distance appropriate to the frequency shall be used. For

frequencies above 1 GHz, any suitable measuring distance may be used. The equipmentDUT size (excluding the

antenna) shall be less than 20 % of the measuring distance. The height of the equipmentDUT or of the substitution

antenna shall be 1,5 m; the height of the test antenna (transmit or receive) shall vary between 1 m and 4 m.

Sufficient precautions shall be taken to ensure that reflections from extraneous objects adjacent to the site do not

degrade the measurement results, in particular:

no extraneous conducting objects having any dimension in excess of a quarter wavelength of the highest

frequency tested shall be in the immediate vicinity of the site according to CISPR 16 [24];

all cables shall be as short as possible; as much of the cables as possible shall be on the ground plane or

preferably below; and the low impedance cables shall be screened.

The general measurement arrangement is shown in figureFigure B.1.

1

1,5 m

2

specifiedheight range

1 to 4 m

ground

plane

34

NOTE: 1: EquipmentDevice under test. 2: Test antenna. 3: High pass filter (as required). 4: Spectrum analyser or measuring receiver.

Figure B.1: Measuring arrangement

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ETSI EN 302 571 V2.1.1 (2017-02) 60

B.1.2 Anechoic chamber

B.1.2.1 General

An anechoic chamber is a well shielded chamber covered inside with radio frequency absorbing material and simulating

a free space environment. It is an alternative site on which to perform the measurements using the radiated measurement

methods described in clause C.2. Absolute or relative measurements may be performed on transmitters or on receivers.

Absolute measurements of field strength require a calibration of the anechoic chamber. The test antenna, equipment

under testDUT and substitution antenna are used in a way similar to that at the open air test site, but are all located at

the same fixed height above the floor.

B.1.2.2 Description

An anechoic chamber should meet the requirements for shielding loss and wall return loss as shown in figureFigure B.2.

Figure B.3 shows an example of the construction of an anechoic chamber having a base area of 5 m by 10 m and a

height of 5 m. The ceiling and walls are coated with pyramidically formedpyramidal absorbers approximately 1 m high.

The base is covered with special absorbers which form the floor. The available internal dimensions of the chamber are

3 m x× 8 m x× 3 m, so that a maximum measuring distance of 5 m in the middle axis of this chamber is available. The

floor absorbers reject floor reflections so that the antenna height need not be changed. Anechoic chambers of other

dimensions may be used.

B.1.2.3 Influence of parasitic reflections

For free-space propagation in the far field, the relationship of the field strength E and the distance R is given by

E = Eo × (Ro/ / R), where Eo is the reference field strength and Ro is the reference distance. This relationship allows

relative measurements to be made as all constants are eliminated within the ratio and neither cable attenuation nor

antenna mismatch or antenna dimensions are of importance.

If the logarithm of the foregoing equation is used, the deviation from the ideal curve may be easily seen because the

ideal correlation of field strength and distance appears as a straight line. The deviations occurring in practice are then

clearly visible. This indirect method shows quickly and easily any disturbances due to reflections and is far less difficult

than the direct measurement of reflection attenuation.

With an anechoic chamber of the dimensions given above at low frequencies below 100 MHz there are no far field

conditions, but the wall reflections are stronger, so that careful calibration is necessary. In the medium frequency range

from 100 MHz to 1 GHz the dependence of the field strength to the distance meets the expectations very well. Above

1 GHz, because more reflections will occur, the dependence of the field strength to the distance will not correlate so

closely.

B.1.2.4 Calibration and mode of use

The calibration and mode of use is the same as for an open air test site, the only difference being that the test antenna

does not need to be raised and lowered whilst searching for a maximum, which simplifies the method of measurement.

0

10

20

30

40

50

60

70

80

90

100

110

10 k 100 k 1 M 10 M 30 M 100 M 300 M 1 G 4 G 10 G f (Hz)

a (dB)

Minimum limit for the sheilding

loss

Limit of the returnloss

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ETSI EN 302 571 V2.1.1 (2017-02) 61

Figure B.2: Specification for shielding and reflections

10 m

5 m

1 m

Equipment

under test

Non-conductive turntables

Non-conductive surface

Measurement distance

Measurement distance

Non-conductive turntables

Measuring

Antenna

Filter blocks and

coaxial feedthrough Shielded room without

absorbers for the

test instruments

5 m

Ground plan

Absorbers

Figure B.3: Anechoic shielded chamber for simulated free space measurements

B.2 Test antenna

When the test site is used for radiation measurements the test antenna shall be used to detect the field from both the test

sample and the substitution antenna. When the test site is used for the measurement of receiver characteristics the

antenna shall be used as a transmitting antenna. This antenna shall be mounted on a support capable of allowing the

antenna to be used in either horizontal or vertical polarization and for the height of its centre above the ground to be

varied over the specified range. Preferably test antennas with pronounced directivity should be used. The size of the test

antenna along the measurement axis shall not exceed 20 % of the measuring distance.

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ETSI EN 302 571 V2.1.1 (2017-02) 62

B.3 Substitution antenna

The substitution antenna shall be used to replace the UUTDUT in substitution measurements. For measurements below

1 GHz the substitution antenna shall be a half wavelength dipole resonant at the frequency under consideration, or a

shortened dipole, calibrated to the half wavelength dipole. For measurements between 1 GHz and 4 GHz either a half

wavelength dipole or a horn radiator may be used. For measurements above 4 GHz a horn radiator shall be used. The

centre of this antenna shall coincide with the reference point of the test sample it has replaced. This reference point shall

be the volume centre of the sample when its antenna is mounted inside the cabinet, or the point where an outside

antenna is connected to the cabinet.

The distance between the lower extremity of the dipole and the ground shall be at least 30 cm.

NOTE: The gain of a horn antenna is generally expressed relative to an isotropic radiator.

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ETSI EN 302 571 V2.1.1 (2017-02) 63

Annex C (normative): General description of measurement

C.1 Introduction

This annex gives the general methods of measurements for RF signals using the test sites and arrangements described in

annex B.

C.12 Conducted measurements

Conducted measurements may be applied to equipmentDUT provided with ana 50 antenna connector, e.g. by means

of a spectrum analyser.

The Voltage Standing Wave Ratio (VSWR) at the 50 connector shall not be greater than 1,5: 1 over the frequency

range of the measurement.

Conducted power measurements refer to RMS (root mean square) power values, i.e. shall use RMS power detectors.

C.23 Radiated measurements

Radiated measurements shall be performed with the aid of a test antenna and measurement instruments as described in

annex B. The test antenna and measurement instrument shall be calibrated according to the procedure defined in this

annex. The equipmentDUT to be measured and the test antenna shall be oriented to obtain the maximum emitted power

level. This position shall be recorded in the measurement report. The frequency range shall be measured in this position.

Radiated measurements should be performed in an anechoic chamber. For other test sites corrections may be needed

(see annex B). The following test procedure applies:

a) a test site which fulfils the requirements of the specified frequency range of this measurement shall be used.

The test antenna shall be oriented initially for vertical polarization unless otherwise stated and the transmitter

under test shall be placed on the support in its standard position (clause B.1.1) and switched on;

b) for average power measurements shall a non-selective voltmeter or wideband spectrum analyser shall (or

alternative measurement instrument) be used. For other measurements shall a spectrum analyser or selective

voltmeter shall (or alternative measurement instrument) be used and tuned to the measurement frequency.

In either case a) or case b), the test antenna shall be raised or lowered, if necessary, through the specified height range

until the maximum signal level is detected on the spectrum analyser or selective voltmeter.

The test antenna need not be raised or lowered if the measurement is carried out on a test site according to clause B.1.2.

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ETSI EN 302 571 V2.1.1 (2017-02) 64

1

1,5 m

2

specified

height range

1 to 4 m

ground

plane

3

NOTE: 1: EquipmentDevice under test. 2: Test antenna. 3: Spectrum analyser or measuring receiver.

Figure C.1: Measurement arrangement 1

The transmitter shall be rotated through 360about a vertical axis until a higher maximum signal is received.

The test antenna shall be raised or lowered again, if necessary, through the specified height range until a

maximum is obtained. This level shall be recorded.

NOTE: This maximum may be a lower value than the value obtainable at heights outside the specified limits.


This measurement shall be repeated for horizontal polarization. The result of the measurement is the higher power

obtained from the two measurements with the indication of the corresponding polarization.

C.34 Substitution measurement

The actual signal generated by the measured equipmentDUT may be determined by means of a substitution

measurement in which a known signal source replaces the device to be measured, see figureFigure C.2. This method of

measurement should be used in an anechoic chamber. For other test sites corrections may be needed, see annex B.

1

1,5 m

2

specifiedheight range

1 to 4 m

ground

plane

34

NOTE: 1: Substitution antenna. 2: Test antenna. 3: Spectrum analyser or selective voltmeter. 4: Signal generator.

Figure C.2: Measurement arrangement 2

Using measurement arrangement 2, figureFigure C.2, the substitution antenna shall replace the transmitter antenna in

the same position and in vertical polarization. The frequency of the signal generator shall be adjusted to the

measurement frequency. The test antenna shall be raised or lowered, if necessary, to ensure that the maximum signal is

still received. The input signal to the substitution antenna shall be adjusted in level until an equal or a known related

level to that detected from the transmitter is obtained in the test receiver.

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ETSI EN 302 571 V2.1.1 (2017-02) 65


The radiated power is equal to the power supplied by the signal generator, increased by the known relationship if

necessary and after corrections due to the gain of the substitution antenna and the cable loss between the signal

generator and the substitution antenna.

This measurement shall be repeated with horizontal polarization. The result of the measurement is the higher power

obtained from the two measurements with the indication of the corresponding polarization.

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ETSI EN 302 571 V2.1.1 (2017-02) 66

Annex D

Annex D (informative): Guidance on declaring the environmental profile

D.1 Recommended environmental profile

The requirements of the present document should apply under the environmental profile for intended operation, either

normal or extreme environmental conditions, which are recommended to be selected by the manufacturer in accordance

with clause D.2.

D.2 Temperatures

D.2.1 Introduction

Before measurements are made the equipment should have reached the thermal balance in the test chamber. The

equipment should be switched off during the temperature stabilizing period.

In the case of equipment containing temperature stabilization circuits designed to operate continuously, the temperature

stabilization circuits may be switched on for 15 minutes after thermal balance has been obtained, and the equipment

should then meet the specified requirements. For such equipment the manufacturer should provide for the power source

circuit feeding the crystal oven to be independent of the power source for the rest of the equipment.

If the thermal balance is not checked by measurements, a temperature stabilizing period of at least one hour, or a longer

period as may be decided by the testing laboratory, should be allowed. The sequence of measurements should be

chosen, and the humidity content in the test chamber should be controlled so that excessive condensation does not

occur.

D.2.2 Normal environmental conditions

The normal temperature and humidity conditions for tests should be any convenient combination of temperature and

humidity within the following ranges:

temperature: +15 °C to +35 °C;


When it is impracticable to carry out the tests under these conditions, a note to this effect, stating the ambient temperature

and relative humidity during the tests, should be added to the test report.

D.2.3 Extreme environmental conditions

The extreme temperature and humidity conditions for tests should be any convenient combination of temperature and

humidity within the following ranges:

temperature: -30 °C to +70 °C,


The manufacturer can also declare under which extreme conditions the equipment is intended to be installed in.

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ETSI EN 302 571 V2.1.1 (2017-02) 67

D.3 Test power source

D.3.1 Introduction

During testing, the power source of the equipment should be replaced by a test power source capable of producing

normal and extreme test voltages as specified in clause D.3.2 and clause D.3.3. The internal impedance of the test

power source should be low enough for its effect on the test results to be negligible. For the purpose of tests, the voltage

of the power should be measured at the input terminals of the equipment.

For battery operated equipment the battery should be removed and the test power source should be applied as close to

the battery terminals as practicable.

During tests of DC powered equipment the power source voltages should be maintained within a tolerance of ±1 %

relative to the voltage at the beginning of each test. The value of this tolerance is critical for power measurements, using

a smaller tolerance provides better measurement uncertainty values.

D.3.2 Normal test power source

D.3.2.1 AC mains voltage

The normal test voltage for equipment to be connected to the mains should be the nominal mains voltage. For the

purpose of the present document, the nominal voltage should be the declared voltage or any of the declared voltages for

which the equipment was designed.

The frequency of the test power source corresponding to the AC mains should be between 49 Hz and 51 Hz.

D.3.2.2 Regulated lead-acid battery power sources used on vehicles

When the radio equipment is intended for operation from the usual types of regulated lead-acid battery power source

used on vehicles the normal test voltage should be 1,1 times the nominal voltage of the battery (e.g. for nominal

voltages of 6 V and 12 V, these are 6,6 V and 13,2 V, respectively).

D.3.2.3 Other power sources

The normal test voltage should be that declared by the equipment manufacturer for operation from other power sources or

types of battery (primary or secondary).

D.3.3 Extreme test source voltages

D.3.3.1 AC mains voltage

The extreme test voltage for equipment to be connected to an AC mains source should be the nominal mains voltage

±10 %.

D.3.3.2 Regulated lead-acid battery power sources used on vehicles

When the equipment is intended for operation from the usual types of regulated lead-acid battery power sources used on

vehicles the extreme test voltages should be 1,3 and 0,9 times the nominal voltage of the battery (e.g. for a nominal voltage

of 6 V, these are 7,8 V and 5,4 V respectively and for a nominal voltage of 12 V, these are 15,6 V and 10,8 V, respectively).

D.3.3.3 Power sources using other types of batteries

The lower extreme test voltages for equipment with power sources using batteries should be as follows:

- for the nickel metal-hydride, leclanché or lithium type: 0,85 times the nominal battery voltage;

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ETSI EN 302 571 V2.1.1 (2017-02) 68

- for the mercury or nickel-cadmium type: 0,9 times the nominal battery voltage.

No upper extreme test voltages apply.

In the case where there is no upper extreme test voltage the nominal voltage (Vnominal) is applicable, the corresponding

extreme test conditions are then:

Vmin/Tmin and Vmin/Tmax;

Vnominal/Tmin and Vnominal/Tmax.

D.3.3.4 Other power sources

For equipment using other power sources, or capable of being operated from a variety of power sources, the extreme test

voltages should be those declared by the equipment manufacturer.

D.3.4 Procedure for equipment designed for continuous transmission

If the manufacturer states that the equipment is designed for continuous transmission, the test procedure should be as

follows. Before tests at the upper extreme temperature, the equipment should be placed in the test chamber, and left until

thermal balance is attained. The equipment should then be switched on in the transmit condition for a period of half an hour,

after which the equipment should meet the specified requirements.

Before tests at the lower extreme temperature, the equipment should be left in the test chamber until thermal balance is

attained, then switched to the standby or receive condition for a period of one minute, after which the equipment should

meet the specified requirements.

D.3.5 Procedure for equipment designed for intermittent transmission

If the manufacturer states that the equipment is designed for intermittent transmission, the test procedure should be as

follows. Before tests at the upper extreme temperature, the equipment should be placed in the test chamber, and left until

thermal balance is attained. The equipment should then be switched on for one minute in the transmit condition, followed by

four minutes in the receive condition, after which the equipment should meet the specified requirements.

For tests at the lower extreme temperature, the equipment should be left in the test chamber until thermal balance is attained,

then switched to the standby or receive condition for one minute, after which the equipment should meet the specified

requirements.

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ETSI EN 302 571 V2.1.1 (2017-02) 69

Annex E (informative): Bibliography

ECC Report 101: "Compatibility studies in the band 5855- 5925 MHz between Intelligent Transport Systems

(ITS) and other systems".

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).

Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the

harmonisation of the laws of Member States relating to electrical equipment designed for use within certain

voltage limits (LV Directive).

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ETSI EN 302 571 V2.1.1 (2017-02) 70

History

Document history

V1.1.1 September 2008 Publication


V2.0.0 March 2016 EN Approval Procedure AP 20160623: 2016-03-25 to 2016-06-23

V2.1.1 December 2016 Vote V 20170205 2016-12-07 to 2017-02-06

V2.1.1 February 2017 Publication

Annex F (informative): Change History

Version Information about changes

2.1.1

First published version covering Directive 2014/53/EU [i.4]. Major changes are:

Limits for RF output power, transmitter unwanted emissions and receiver blocking changed.

Interference mitigation for CEN DSRC and HDR DSRC refers to ETSI TS 102 792 (V1.2.1) [1].

ETSI

ETSI EN 302 571 V2.1.1 (2017-02) 71

History

Document history



V2.0.0 March 2016 EN Approval Procedure AP 20160623: 2016-03-25 to 2016-06-23

V2.1.1 December 2016 Vote V 20170205 2016-12-07 to 2017-02-06

V2.1.1 February 2017 Publication

Documents

ETSI EN 302 571 V2.1 · 7 ETSI EN 302 571 V2.1.1 (2017-02) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI