Advanced Surface Movement Guidance and Control System (A-SMGCS) - Part 5: Harmonised Standard for access to radio spectrum for Multilateration (MLAT) equipment - Sub-part 2: Reference and Vehicle Transmitters

The present document specifies technical characteristics and methods of measurements for the following equipment:
1) devices transmitting in the 1 090 MHz band, used as ground-based reference transmitters in Mode S
multilateration equipment in an Advanced Surface Movement Guidance and Control System (A-SMGCS);
2) devices transmitting in the 1 090 MHz band, used for ground vehicle tracking in an Advanced Surface
Movement Guidance and Control System (A-SMGCS).
Antennas for this equipment are considered to be passive without an additional amplifier.
NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive
2014/53/EU [i.1] is given in Annex A.

Napredni sistem za vodenje in nadzor gibanja po zemlji (A-SMGCS) - 5. del: Harmonizirani standard za dostop do radijskega spektra za večplastno (MLAT) opremo - 2. poddel: Referenca in oddajniki za vozila

Ta dokument določa tehnične lastnosti in merilne metode za naslednjo opremo: 1) naprave, ki oddajajo v pasu 1090 MHz in se uporabljajo kot zemeljski referenčni oddajniki v multilateracijski opremi Mode S v naprednem sistemu za vodenje in nadzor gibanja po zemlji (A-SMGCS); 2) naprave, ki oddajajo v pasu 1090 MHz in se uporabljajo za sledenje kopenskih vozil v naprednem sistemu za vodenje in nadzor gibanja po zemlji (A-SMGCS). Antene za to opremo veljajo za pasivne brez dodatnega ojačevalnika. OPOMBA: Razmerje med tem dokumentom in bistvenimi zahtevami člena 3.2 Direktive 2014/53/EU [i.1] je podano v dodatku A.

General Information

Status
Published
Public Enquiry End Date
25-Apr-2022
Publication Date
09-May-2022
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
03-May-2022
Due Date
08-Jul-2022
Completion Date
10-May-2022

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SLOVENSKI STANDARD
SIST EN 303 213-5-2 V1.1.1:2022
01-junij-2022
Napredni sistem za vodenje in nadzor gibanja po zemlji (A-SMGCS) - 5. del:
Harmonizirani standard za dostop do radijskega spektra za večplastno (MLAT)
opremo - 2. poddel: Referenca in oddajniki za vozila
Advanced Surface Movement Guidance and Control System (A-SMGCS) - Part 5:
Harmonised Standard for access to radio spectrum for Multilateration (MLAT) equipment
- Sub-part 2: Reference and Vehicle Transmitters
Ta slovenski standard je istoveten z: ETSI EN 303 213-5-2 V1.1.1 (2022-04)
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
SIST EN 303 213-5-2 V1.1.1:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 303 213-5-2 V1.1.1:2022

---------------------- Page: 2 ----------------------
SIST EN 303 213-5-2 V1.1.1:2022
ETSI EN 303 213-5-2 V1.1.1 (2022-04)






HARMONISED EUROPEAN STANDARD
Advanced Surface Movement Guidance and
Control System (A-SMGCS);
Part 5: Harmonised Standard for access to
radio spectrum for Multilateration (MLAT) equipment;
Sub-part 2: Reference and Vehicle Transmitters

---------------------- Page: 3 ----------------------
SIST EN 303 213-5-2 V1.1.1:2022

2 ETSI EN 303 213-5-2 V1.1.1 (2022-04)

Reference
DEN/ERM-TGAERO-37-5-2
Keywords
aeronautical, harmonised standard,
interoperability, radio
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure Program:
https://www.etsi.org/standards/coordinated-vulnerability-disclosure
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2022.
All rights reserved.

ETSI

---------------------- Page: 4 ----------------------
SIST EN 303 213-5-2 V1.1.1:2022

3 ETSI EN 303 213-5-2 V1.1.1 (2022-04)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 6
Introduction . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 9
3.3 Abbreviations . 9
4 Technical requirements specifications . 10
4.1 Environmental profile . 10
4.2 Conformance requirements . 10
4.2.1 Equipment with and without integral antenna . 10
4.2.2 Transmitter operating frequency and frequency error . 10
4.2.2.1 Definition . 10
4.2.2.2 Limits . 10
4.2.2.3 Conformance . 10
4.2.3 Spectrum mask . 11
4.2.3.1 Definition . 11
4.2.3.2 Limits . 11
4.2.3.3 Conformance . 12
4.2.4 Residual Power Output . 12
4.2.4.1 Definition . 12
4.2.4.2 Limits . 12
4.2.4.3 Conformance . 12
4.2.5 Spurious emissions of transmitter in active mode . 12
4.2.5.1 Definition . 12
4.2.5.2 Limits . 12
4.2.5.3 Conformance . 12
4.2.6 Transmitter Intermodulation attenuation . 13
4.2.6.1 Definition . 13
4.2.6.2 Limits . 13
4.2.6.3 Conformance . 13
4.2.7 Duty Cycle . 13
4.2.7.1 Definition . 13
4.2.7.2 Limits . 13
4.2.7.3 Conformance . 13
4.2.8 Peak Output Power . 13
4.2.8.1 Definition . 13
4.2.8.2 Limits . 13
4.2.8.3 Conformance . 14
5 Testing for compliance with technical requirements . 14
5.1 Environmental conditions for testing . 14
5.1.1 General requirements . 14
5.1.2 Test conditions . 14
5.1.2.1 Thermal Balance . 14
5.1.2.2 Environmental Test Conditions . 14
5.1.2.2.1 Temperature and humidity. 14
5.1.2.2.2 Power supply . 14
5.1.2.3 Environmental range tests . 15
ETSI

---------------------- Page: 5 ----------------------
SIST EN 303 213-5-2 V1.1.1:2022

4 ETSI EN 303 213-5-2 V1.1.1 (2022-04)
5.1.2.3.1 Temperature range . 15
5.1.2.3.2 Extreme Power supply . 15
5.2 Transmitter test signals . 15
5.2.1 General Considerations . 15
5.2.2 Test signal A . 15
5.3 Transmitter tests . 16
5.3.1 Operating frequency and frequency error . 16
5.3.1.1 Description . 16
5.3.1.2 Test conditions . 16
5.3.1.3 Method of measurement . 16
5.3.1.4 Measurement procedure . 16
5.3.2 Peak Output Power . 16
5.3.2.1 Description . 16
5.3.2.2 Test conditions . 16
5.3.2.3 Method of measurement . 17
5.3.2.4 Measurement procedure . 17
5.3.3 Spectrum mask . 17
5.3.3.1 Description . 17
5.3.3.2 Test conditions . 17
5.3.3.3 Method of measurement . 17
5.3.3.4 Measurement procedure . 17
5.3.4 Residual Power Output . 18
5.3.4.1 Description . 18
5.3.4.2 Test conditions . 18
5.3.4.3 Method of measurement . 18
5.3.4.4 Measurement procedure . 18
5.3.5 Spurious emissions of transmitter in active mode . 18
5.3.5.1 Description . 18
5.3.5.2 Test conditions . 19
5.3.5.3 Method of measurement . 19
5.3.5.4 Measurement Procedure . 19
5.3.6 Transmitter Intermodulation attenuation . 20
5.3.6.1 Description . 20
5.3.6.2 Test Conditions . 20
5.3.6.3 Method of Measurement . 20
5.3.6.4 Measurement Procedure . 20
5.3.7 Duty Cycle . 21
5.3.7.1 Description . 21
5.3.7.2 Test conditions . 21
5.3.7.3 Method of measurement . 21
5.3.7.4 Measurement procedure . 21
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 22
Annex B (informative): Maximum Measurement Uncertainty . 24
Annex C (informative): Checklist . 25
Annex D (informative): Bibliography . 26
History . 27


ETSI

---------------------- Page: 6 ----------------------
SIST EN 303 213-5-2 V1.1.1:2022

5 ETSI EN 303 213-5-2 V1.1.1 (2022-04)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are 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 Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
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.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its

Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the
®
oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM).
The present document has been prepared under the Commission's standardisation request C (2015) 5376 final [i.3] 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.1].
Once the present document is cited in the Official Journal of the European Union under 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 with the corresponding essential requirements of that Directive and associated
EFTA regulations.
The present document is part 5, sub-part 2, of a multi-part deliverable covering Advanced Surface Movement Guidance
and Control System (A-SMGCS), as identified below:
Part 1: "Community Specification for A-SMGCS surveillance service including external interfaces";
Part 2: "Community Specification for A-SMGCS airport safety support service";
Part 3: "Community Specification for a deployed cooperative sensor including its interfaces";
Part 4: "Community Specification for a deployed non-cooperative sensor including its interfaces";
Part 5: "Harmonised Standard for access to radio spectrum for Multilateration (MLAT) equipment":
Sub-part 1: "Receivers and Interrogators";
Sub-part 2: "Reference and Vehicle Transmitters";
Part 6: "Harmonised Standard for access to radio spectrum for deployed surface movement radar sensors";
Part 7: "Community Specification for A-SMGCS routing service";
ETSI

---------------------- Page: 7 ----------------------
SIST EN 303 213-5-2 V1.1.1:2022

6 ETSI EN 303 213-5-2 V1.1.1 (2022-04)
Part 8: "Community Specification for A-SMGCS guidance service".

National transposition dates
Date of adoption of this EN: 26 April 2022
Date of latest announcement of this EN (doa): 31 July 2022
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 January 2023
Date of withdrawal of any conflicting National Standard (dow): 31 January 2024

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.
Introduction
A-SMGCS are systems providing routing, guidance, surveillance and control to aircraft and affected vehicles in order to
maintain movement rate under all local weather conditions within the Aerodrome Visibility Operational Level (AVOL)
whilst maintaining the required level of safety.

ETSI

---------------------- Page: 8 ----------------------
SIST EN 303 213-5-2 V1.1.1:2022

7 ETSI EN 303 213-5-2 V1.1.1 (2022-04)
1 Scope
The present document specifies technical characteristics and methods of measurements for the following equipment:
1) devices transmitting in the 1 090 MHz band, used as ground-based reference transmitters in Mode S
multilateration equipment in an Advanced Surface Movement Guidance and Control System (A-SMGCS);
2) devices transmitting in the 1 090 MHz band, used for ground vehicle tracking in an Advanced Surface
Movement Guidance and Control System (A-SMGCS).
Antennas for this equipment are considered to be passive without an additional amplifier.
NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive
2014/53/EU [i.1] is given in Annex A.
2 References
2.1 Normative 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.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
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] EUROCAE ED-117A (September 2016): "Minimum operational performance specification for
Mode S Multilateration Systems for Use in Advanced Surface Movement Guidance and Control
Systems (A-SMGCS)".
[2] ETSI EN 300 019-1-3 (V2.4.1) (04-2014): "Environmental Engineering (EE); Environmental
conditions and environmental tests for telecommunications equipment; Part 1-3: Classification of
environmental conditions; Stationary use at weatherprotected locations".
[3] ETSI EN 300 019-1-4 (V2.2.1) (04-2014): "Environmental Engineering (EE); Environmental
conditions and environmental tests for telecommunications equipment; Part 1-4: Classification of
environmental conditions; Stationary use at non-weatherprotected locations".
th
[4] ICAO Annex 10, Volume IV: "Surveillance Radar and Collision Avoidance systems", 5 edition,
July 2014, including amendments up to amendment 90, November 2018.
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.
ETSI

---------------------- Page: 9 ----------------------
SIST EN 303 213-5-2 V1.1.1:2022

8 ETSI EN 303 213-5-2 V1.1.1 (2022-04)
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 2014/53/EU of the European Parliament and of the Council of 16 April 2014 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.2] ETSI EG 203 336 (V1.2.1): "Guide for the selection of technical parameters for the production of
Harmonised Standards covering article 3.1(b) and article 3.2 of Directive 2014/53/EU".
[i.3] 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.4] ERC Recommendation 74-01 (2019): "Unwanted emissions in spurious domain".
[i.5] EUROCAE ED-102B (December 2020): "MOPS for 1090 MHz Extended Squitter ADS-B and
TIS-B".
[i.6] ICAO, Doc-9871: "Technical Provisions for Mode S Services and Extended Squitter", edition 2,
2012.
[i.7] ITU Radio Regulations (2020).
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of th
...

ETSI EN 303 213-5-2 V1.1.1 (2022-04)






HARMONISED EUROPEAN STANDARD
Advanced Surface Movement Guidance and
Control System (A-SMGCS);
Part 5: Harmonised Standard for access to
radio spectrum for Multilateration (MLAT) equipment;
Sub-part 2: Reference and Vehicle Transmitters

---------------------- Page: 1 ----------------------
2 ETSI EN 303 213-5-2 V1.1.1 (2022-04)

Reference
DEN/ERM-TGAERO-37-5-2
Keywords
aeronautical, harmonised standard,
interoperability, radio
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure Program:
https://www.etsi.org/standards/coordinated-vulnerability-disclosure
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2022.
All rights reserved.

ETSI

---------------------- Page: 2 ----------------------
3 ETSI EN 303 213-5-2 V1.1.1 (2022-04)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 6
Introduction . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 9
3.3 Abbreviations . 9
4 Technical requirements specifications . 10
4.1 Environmental profile . 10
4.2 Conformance requirements . 10
4.2.1 Equipment with and without integral antenna . 10
4.2.2 Transmitter operating frequency and frequency error . 10
4.2.2.1 Definition . 10
4.2.2.2 Limits . 10
4.2.2.3 Conformance . 10
4.2.3 Spectrum mask . 11
4.2.3.1 Definition . 11
4.2.3.2 Limits . 11
4.2.3.3 Conformance . 12
4.2.4 Residual Power Output . 12
4.2.4.1 Definition . 12
4.2.4.2 Limits . 12
4.2.4.3 Conformance . 12
4.2.5 Spurious emissions of transmitter in active mode . 12
4.2.5.1 Definition . 12
4.2.5.2 Limits . 12
4.2.5.3 Conformance . 12
4.2.6 Transmitter Intermodulation attenuation . 13
4.2.6.1 Definition . 13
4.2.6.2 Limits . 13
4.2.6.3 Conformance . 13
4.2.7 Duty Cycle . 13
4.2.7.1 Definition . 13
4.2.7.2 Limits . 13
4.2.7.3 Conformance . 13
4.2.8 Peak Output Power . 13
4.2.8.1 Definition . 13
4.2.8.2 Limits . 13
4.2.8.3 Conformance . 14
5 Testing for compliance with technical requirements . 14
5.1 Environmental conditions for testing . 14
5.1.1 General requirements . 14
5.1.2 Test conditions . 14
5.1.2.1 Thermal Balance . 14
5.1.2.2 Environmental Test Conditions . 14
5.1.2.2.1 Temperature and humidity. 14
5.1.2.2.2 Power supply . 14
5.1.2.3 Environmental range tests . 15
ETSI

---------------------- Page: 3 ----------------------
4 ETSI EN 303 213-5-2 V1.1.1 (2022-04)
5.1.2.3.1 Temperature range . 15
5.1.2.3.2 Extreme Power supply . 15
5.2 Transmitter test signals . 15
5.2.1 General Considerations . 15
5.2.2 Test signal A . 15
5.3 Transmitter tests . 16
5.3.1 Operating frequency and frequency error . 16
5.3.1.1 Description . 16
5.3.1.2 Test conditions . 16
5.3.1.3 Method of measurement . 16
5.3.1.4 Measurement procedure . 16
5.3.2 Peak Output Power . 16
5.3.2.1 Description . 16
5.3.2.2 Test conditions . 16
5.3.2.3 Method of measurement . 17
5.3.2.4 Measurement procedure . 17
5.3.3 Spectrum mask . 17
5.3.3.1 Description . 17
5.3.3.2 Test conditions . 17
5.3.3.3 Method of measurement . 17
5.3.3.4 Measurement procedure . 17
5.3.4 Residual Power Output . 18
5.3.4.1 Description . 18
5.3.4.2 Test conditions . 18
5.3.4.3 Method of measurement . 18
5.3.4.4 Measurement procedure . 18
5.3.5 Spurious emissions of transmitter in active mode . 18
5.3.5.1 Description . 18
5.3.5.2 Test conditions . 19
5.3.5.3 Method of measurement . 19
5.3.5.4 Measurement Procedure . 19
5.3.6 Transmitter Intermodulation attenuation . 20
5.3.6.1 Description . 20
5.3.6.2 Test Conditions . 20
5.3.6.3 Method of Measurement . 20
5.3.6.4 Measurement Procedure . 20
5.3.7 Duty Cycle . 21
5.3.7.1 Description . 21
5.3.7.2 Test conditions . 21
5.3.7.3 Method of measurement . 21
5.3.7.4 Measurement procedure . 21
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 22
Annex B (informative): Maximum Measurement Uncertainty . 24
Annex C (informative): Checklist . 25
Annex D (informative): Bibliography . 26
History . 27


ETSI

---------------------- Page: 4 ----------------------
5 ETSI EN 303 213-5-2 V1.1.1 (2022-04)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are 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 Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
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.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its

Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the
®
oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM).
The present document has been prepared under the Commission's standardisation request C (2015) 5376 final [i.3] 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.1].
Once the present document is cited in the Official Journal of the European Union under 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 with the corresponding essential requirements of that Directive and associated
EFTA regulations.
The present document is part 5, sub-part 2, of a multi-part deliverable covering Advanced Surface Movement Guidance
and Control System (A-SMGCS), as identified below:
Part 1: "Community Specification for A-SMGCS surveillance service including external interfaces";
Part 2: "Community Specification for A-SMGCS airport safety support service";
Part 3: "Community Specification for a deployed cooperative sensor including its interfaces";
Part 4: "Community Specification for a deployed non-cooperative sensor including its interfaces";
Part 5: "Harmonised Standard for access to radio spectrum for Multilateration (MLAT) equipment":
Sub-part 1: "Receivers and Interrogators";
Sub-part 2: "Reference and Vehicle Transmitters";
Part 6: "Harmonised Standard for access to radio spectrum for deployed surface movement radar sensors";
Part 7: "Community Specification for A-SMGCS routing service";
ETSI

---------------------- Page: 5 ----------------------
6 ETSI EN 303 213-5-2 V1.1.1 (2022-04)
Part 8: "Community Specification for A-SMGCS guidance service".

National transposition dates
Date of adoption of this EN: 26 April 2022
Date of latest announcement of this EN (doa): 31 July 2022
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 January 2023
Date of withdrawal of any conflicting National Standard (dow): 31 January 2024

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.
Introduction
A-SMGCS are systems providing routing, guidance, surveillance and control to aircraft and affected vehicles in order to
maintain movement rate under all local weather conditions within the Aerodrome Visibility Operational Level (AVOL)
whilst maintaining the required level of safety.

ETSI

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7 ETSI EN 303 213-5-2 V1.1.1 (2022-04)
1 Scope
The present document specifies technical characteristics and methods of measurements for the following equipment:
1) devices transmitting in the 1 090 MHz band, used as ground-based reference transmitters in Mode S
multilateration equipment in an Advanced Surface Movement Guidance and Control System (A-SMGCS);
2) devices transmitting in the 1 090 MHz band, used for ground vehicle tracking in an Advanced Surface
Movement Guidance and Control System (A-SMGCS).
Antennas for this equipment are considered to be passive without an additional amplifier.
NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive
2014/53/EU [i.1] is given in Annex A.
2 References
2.1 Normative 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.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
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] EUROCAE ED-117A (September 2016): "Minimum operational performance specification for
Mode S Multilateration Systems for Use in Advanced Surface Movement Guidance and Control
Systems (A-SMGCS)".
[2] ETSI EN 300 019-1-3 (V2.4.1) (04-2014): "Environmental Engineering (EE); Environmental
conditions and environmental tests for telecommunications equipment; Part 1-3: Classification of
environmental conditions; Stationary use at weatherprotected locations".
[3] ETSI EN 300 019-1-4 (V2.2.1) (04-2014): "Environmental Engineering (EE); Environmental
conditions and environmental tests for telecommunications equipment; Part 1-4: Classification of
environmental conditions; Stationary use at non-weatherprotected locations".
th
[4] ICAO Annex 10, Volume IV: "Surveillance Radar and Collision Avoidance systems", 5 edition,
July 2014, including amendments up to amendment 90, November 2018.
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.
ETSI

---------------------- Page: 7 ----------------------
8 ETSI EN 303 213-5-2 V1.1.1 (2022-04)
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 2014/53/EU of the European Parliament and of the Council of 16 April 2014 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.2] ETSI EG 203 336 (V1.2.1): "Guide for the selection of technical parameters for the production of
Harmonised Standards covering article 3.1(b) and article 3.2 of Directive 2014/53/EU".
[i.3] 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.4] ERC Recommendation 74-01 (2019): "Unwanted emissions in spurious domain".
[i.5] EUROCAE ED-102B (December 2020): "MOPS for 1090 MHz Extended Squitter ADS-B and
TIS-B".
[i.6] ICAO, Doc-9871: "Technical Provisions for Mode S Services and Extended Squitter", edition 2,
2012.
[i.7] ITU Radio Regulations (2020).
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
conducted measurements: measurements which are made using a wired connection to the EUT
environmental profile: range of environmental conditions under which the EUT is declared by the manufacturer to
comply with the provisions of the present document
equipment under test: system of constituents provided by the manufacturer for qualification under the present
document
ground based multilateration equipment or ground station: aeronautical station equipment intended for use in an
A-SMGCS multilateration component
NOTE: A ground station can include sensor, interrogator and/or transponder components. A ground station can be
fixed or mobile.
inactive state: entire period between transmissions, less 100 μs transition periods preceding and following the
transmission
integral antenna: antenna which is integrated into the EUT without the use of an external connector, and which is
considered to be part of the EUT
interrogator: aeronautical station equipment including at least one transmitter designed to produce aeronautical mobile
service signals at 1 030 MHz
Mode S: particular type of transponder uplink or downlink message defined in IC
...

SLOVENSKI STANDARD
oSIST prEN 303 213-5-2 V1.0.1:2022
01-april-2022
Napredni sistem za vodenje in nadzor gibanja po zemlji (A-SMGCS) - 5. del:
Harmonizirani standard za dostop do radijskega spektra za večplastno (MLAT)
opremo - 2. poddel: Referenca in oddajniki za vozila
Advanced Surface Movement Guidance and Control System (A-SMGCS) - Part 5:
Harmonised Standard for access to radio spectrum for Multilateration (MLAT) equipment
- Sub-part 2: Reference and Vehicle Transmitters
Ta slovenski standard je istoveten z: ETSI EN 303 213-5-2 V1.0.1 (2022-01)
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
oSIST prEN 303 213-5-2 V1.0.1:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 303 213-5-2 V1.0.1:2022

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oSIST prEN 303 213-5-2 V1.0.1:2022
Draft ETSI EN 303 213-5-2 V1.0.1 (2022-01)






HARMONISED EUROPEAN STANDARD
Advanced Surface Movement Guidance and
Control System (A-SMGCS);
Part 5: Harmonised Standard for access to
radio spectrum for Multilateration (MLAT) equipment;
Sub-part 2: Reference and Vehicle Transmitters

---------------------- Page: 3 ----------------------
oSIST prEN 303 213-5-2 V1.0.1:2022
 2 Draft ETSI EN 303 213-5-2 V1.0.1 (2022-01)

Reference
DEN/ERM-TGAERO-37-5-2
Keywords
aeronautical, harmonised standard,
interoperability, radio
ETSI
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Sous-Préfecture de Grasse (06) N° w061004871

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The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
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No recommendation as to products and services or vendors is made or should be implied.
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No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
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The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2022.
All rights reserved.

ETSI

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oSIST prEN 303 213-5-2 V1.0.1:2022
 3 Draft ETSI EN 303 213-5-2 V1.0.1 (2022-01)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 6
Introduction . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 8
3.1 Terms . 8
3.2 Symbols . 9
3.3 Abbreviations . 9
4 Technical requirements specifications . 10
4.1 Environmental profile . 10
4.2 Conformance requirements . 10
4.2.1 Equipment with and without integral antenna . 10
4.2.2 Transmitter operating frequency and frequency error . 10
4.2.2.1 Definition . 10
4.2.2.2 Limits . 10
4.2.2.3 Conformance . 10
4.2.3 Spectrum mask . 11
4.2.3.1 Definition . 11
4.2.3.2 Limits . 11
4.2.3.3 Conformance . 12
4.2.4 Residual Power Output . 12
4.2.4.1 Definition . 12
4.2.4.2 Limits . 12
4.2.4.3 Conformance . 12
4.2.5 Spurious emissions of transmitter in active mode . 12
4.2.5.1 Definition . 12
4.2.5.2 Limits . 12
4.2.5.3 Conformance . 12
4.2.6 Transmitter Intermodulation attenuation . 13
4.2.6.1 Definition . 13
4.2.6.2 Limits . 13
4.2.6.3 Conformance . 13
4.2.7 Duty Cycle . 13
4.2.7.1 Definition . 13
4.2.7.2 Limits . 13
4.2.7.3 Conformance . 13
4.2.8 Peak Output Power . 13
4.2.8.1 Definition . 13
4.2.8.2 Limits . 13
4.2.8.3 Conformance . 14
5 Testing for compliance with technical requirements . 14
5.1 Environmental conditions for testing . 14
5.1.1 General requirements . 14
5.1.2 Test conditions . 14
5.1.2.1 Thermal Balance . 14
5.1.2.2 Environmental Test Conditions . 14
5.1.2.2.1 Temperature and humidity. 14
5.1.2.2.2 Power supply . 14
5.1.2.3 Environmental range tests . 15
ETSI

---------------------- Page: 5 ----------------------
oSIST prEN 303 213-5-2 V1.0.1:2022
 4 Draft ETSI EN 303 213-5-2 V1.0.1 (2022-01)
5.1.2.3.1 Temperature range . 15
5.1.2.3.2 Extreme Power supply . 15
5.2 Transmitter test signals . 15
5.2.1 General Considerations . 15
5.2.2 Test signal A . 15
5.3 Transmitter tests . 16
5.3.1 Operating frequency and frequency error . 16
5.3.1.1 Description . 16
5.3.1.2 Test conditions . 16
5.3.1.3 Method of measurement . 16
5.3.1.4 Measurement procedure . 16
5.3.2 Peak Output Power . 16
5.3.2.1 Description . 16
5.3.2.2 Test conditions . 16
5.3.2.3 Method of measurement . 17
5.3.2.4 Measurement procedure . 17
5.3.3 Spectrum mask . 17
5.3.3.1 Description . 17
5.3.3.2 Test conditions . 17
5.3.3.3 Method of measurement . 17
5.3.3.4 Measurement procedure . 17
5.3.4 Residual Power Output . 18
5.3.4.1 Description . 18
5.3.4.2 Test conditions . 18
5.3.4.3 Method of measurement . 18
5.3.4.4 Measurement procedure . 18
5.3.5 Spurious emissions of transmitter in active mode . 18
5.3.5.1 Description . 18
5.3.5.2 Test conditions . 19
5.3.5.3 Method of measurement . 19
5.3.5.4 Measurement Procedure . 19
5.3.6 Transmitter Intermodulation attenuation . 20
5.3.6.1 Description . 20
5.3.6.2 Test Conditions . 20
5.3.6.3 Method of Measurement . 20
5.3.6.4 Measurement Procedure . 20
5.3.7 Duty Cycle . 21
5.3.7.1 Description . 21
5.3.7.2 Test conditions . 21
5.3.7.3 Method of measurement . 21
5.3.7.4 Measurement procedure . 21
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 22
Annex B (informative): Maximum Measurement Uncertainty . 24
Annex C (informative): Checklist . 25
Annex D (informative): Bibliography . 26
History . 27


ETSI

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oSIST prEN 303 213-5-2 V1.0.1:2022
 5 Draft ETSI EN 303 213-5-2 V1.0.1 (2022-01)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are 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 Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
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.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its

Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the
®
oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This draft Harmonised European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic
compatibility and Radio spectrum Matters (ERM), and is now submitted for the combined Public Enquiry and Vote
phase of the ETSI standards EN Approval Procedure.
The present document has been prepared under the Commission's standardisation request C (2015) 5376 final [i.3] 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.1].
Once the present document is cited in the Official Journal of the European Union under 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 with the corresponding essential requirements of that Directive and associated
EFTA regulations.
The present document is part 5, sub-part 2, of a multi-part deliverable covering Advanced Surface Movement Guidance
and Control System (A-SMGCS), as identified below:
Part 1: "Community Specification for A-SMGCS surveillance service including external interfaces";
Part 2: "Community Specification for A-SMGCS airport safety support service";
Part 3: "Community Specification for a deployed cooperative sensor including its interfaces";
Part 4: "Community Specification for a deployed non-cooperative sensor including its interfaces";
Part 5: "Harmonised Standard for access to radio spectrum for Multilateration (MLAT) equipment":
Sub-part 1: "Receivers and Interrogators";
Sub-part 2: "Reference and Vehicle Transmitters";
Part 6: "Harmonised Standard for access to radio spectrum for deployed surface movement radar sensors";
ETSI

---------------------- Page: 7 ----------------------
oSIST prEN 303 213-5-2 V1.0.1:2022
 6 Draft ETSI EN 303 213-5-2 V1.0.1 (2022-01)
Part 7: "Community Specification for A-SMGCS routing service";
Part 8: "Community Specification for A-SMGCS guidance service".

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 18 months after doa

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.
Introduction
A-SMGCS are systems providing routing, guidance, surveillance and control to aircraft and affected vehicles in order to
maintain movement rate under all local weather conditions within the Aerodrome Visibility Operational Level (AVOL)
whilst maintaining the required level of safety.

ETSI

---------------------- Page: 8 ----------------------
oSIST prEN 303 213-5-2 V1.0.1:2022
 7 Draft ETSI EN 303 213-5-2 V1.0.1 (2022-01)
1 Scope
The present document specifies technical characteristics and methods of measurements for the following equipment:
1) devices transmitting in the 1 090 MHz band, used as ground-based reference transmitters in Mode S
multilateration equipment in an Advanced Surface Movement Guidance and Control System (A-SMGCS);
2) devices transmitting in the 1 090 MHz band, used for ground vehicle tracking in an Advanced Surface
Movement Guidance and Control System (A-SMGCS).
Antennas for this equipment are considered to be passive without an additional amplifier.
NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive
2014/53/EU [i.1] is given in Annex A.
2 References
2.1 Normative 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.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
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] EUROCAE ED-117A (September 2016): "Minimum operational performance specification for
Mode S Multilateration Systems for Use in Advanced Surface Movement Guidance and Control
Systems (A-SMGCS)".
[2] ETSI EN 300 019-1-3 (V2.4.1) (04-2014): "Environmental Engineering (EE); Environmental
conditions and environmental tests for telecommunications equipment; Part 1-3: Classification of
environmental conditions; Stationary use at weatherprotected locations".
[3] ETSI EN 300 019-1-4 (V2.2.1) (04-2014): "Environmental Engineering (EE); Environmental
conditions and environmental tests for telecommunications equipment; Part 1-4: Classification of
environmental conditions; Stationary use at non-weatherprotected locations".
th
[4] ICAO Annex 10, Volume IV: "Surveillance Radar and Collision Avoidance systems", 5 edition,
July 2014, including amendments up to amendment 90, November 2018.
ETSI

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oSIST prEN 303 213-5-2 V1.0.1:2022
 8 Draft ETSI EN 303 213-5-2 V1.0.1 (2022-01)
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.
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 2014/53/EU of the European Parliament and of the Council of 16 April 2014 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.2] ETSI EG 203 336 (V1.2.1): "Guide for the selection of technical parameters for the production of
Harmonised Standards covering article 3.1(b) and article 3.2 of Directive 2014/53/EU".
[i.3] 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.4] ERC Recommendation 74-01 (2019): "Unwanted emissions in spurious domain".
[i.5] EUROCAE ED-102B (December 2020): "MOPS for 1090 MHz Extended Squitter ADS-B and
TIS-B".
[i.6] ICAO, Doc-9871: "Technical Provisions for Mode S Services and Extended Squitter", edition 2,
2012.
[i.7] ITU Radio Regulations (2020).
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document,
...

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