SIST EN 300 676-1 V1.5.1:2010

• Abstract:

  Modifications from voting on version 1.4.1 and Commission Regulation EC 1265/2007.; The present document states the minimum performance requirements for radio transmitters, receivers and transceivers at ground-based aeronautical stations operating in the VHF band (118 MHz to 136,975 MHz) allocated to the aeronautical mobile service. In situations where transmitters and receivers are located in close proximity there is the possibility of interference. In; such cases, external filters and isolators may be necessary as part of the installation to achieve an isolation performance in excess of the minima defined in the present document to overcome the interference. The present document applies to DSB AM systems, with channel separations of 8,33 kHz or 25 kHz intended for analogue speech and ground base stations with a channel spacing of 25 kHz intended for ACARS data communication. NOTE: The test methods and procedures in the present document may also be used to show technical acceptance for radio transmitters, receivers and transceivers at ground based aeronautical stations operating with 25 kHz channel spacing in the extended VHF bands (108 MHz to 117,975 MHz and 137 MHz to 155,975 MHz). The scope of the present document is limited to ground base stations, ground mobile and hand held radios for ground use.

• Status: Published
• Publication Date: 08-Sep-2010
• ICS: 33.060.20 - Receiving and transmitting equipment
• ICS: 49.090 - On-board equipment and instruments
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 11-Aug-2010
• Due Date: 16-Oct-2010
• Completion Date: 09-Sep-2010
• Ref Project: ETSI EN 300 676-1 V1.5.1 (2010-07) - Ground-based VHF hand-held, mobile and fixed radio transmitters, receivers and transceivers for the VHF aeronautical mobile service using amplitude modulation; Part 1: Technical characteristics and methods of measurement

Overview

SIST EN 300 676-1 V1.5.1:2010 specifies the minimum technical characteristics and measurement methods for ground-based VHF hand-held, mobile, and fixed radio transmitters, receivers, and transceivers used in the aeronautical mobile service with amplitude modulation (AM). This standard covers equipment operating in the VHF frequency range of 118 MHz to 136.975 MHz, as allocated for aeronautical communications, and provides essential requirements to ensure reliable and interference-free operation in ground-based environments. The document reflects changes from the previous version (1.4.1) and aligns with Commission Regulation EC 1265/2007.

Key Topics

• Scope and Applicability

  • Focuses on ground base stations, ground mobile, and hand-held radios for ground use in the VHF aeronautical mobile service.
  • Applies to double sideband (DSB) AM systems, supporting channel separations of 8.33 kHz or 25 kHz for analogue speech, and 25 kHz spacing for ACARS data.

• Technical Performance Requirements

  • Sets out minimum performance specifications for transmitters, receivers, and transceivers, addressing frequency error, carrier power, modulation characteristics, adjacent channel power, and spurious emissions.
  • Emphasizes the importance of external filters or isolators in scenarios where equipment is installed in proximity to minimize interference.

• Methods of Measurement

  • Describes standardized test conditions, including temperature, humidity, power sources, and channel spacing.
  • Defines measurement procedures for transmitter and receiver parameters such as sensitivity, modulation depth, frequency response, noise, bandwidth, and rejection of undesired signals.

• Testing and Compliance

  • Specifies testing environments and outlines procedures for equipment type approval and general market surveillance by regulatory authorities.
  • Notes that test methods can also be utilized for equipment in extended VHF bands (108 MHz - 117.975 MHz and 137 MHz - 155.975 MHz).

Applications

• Aeronautical Base Station Equipment

  • Facilitates reliable ground-to-ground voice and data communication at airports, airfields, and other aeronautical facilities.
  • Ensures ground communication systems meet regulatory and operational requirements for safety and efficiency.

• Type Approval and Market Access

  • Provides accredited test laboratories and manufacturers with a unified set of requirements and testing procedures for certifying VHF radio equipment.
  • Helps assure authorities and users that products meet standardized performance benchmarks, supporting harmonized market access across Europe.

• Installation and Maintenance

  • Offers installation guidance in environments with multiple radios to address potential electromagnetic interference, supporting robust system integration.

Related Standards

• EN 300 676-1 V1.4.1 – The previous version, which this document amends and updates.
• EN 300 676-2 – Addresses harmonized requirements regarding the essential requirements under Article 3.2 of the R&TTE Directive.
• Commission Regulation EC 1265/2007 – Provides the regulatory context for frequency assignments and interference considerations in the VHF AM aeronautical band.
• Other Aeronautical Communication Standards – Including those governing UHF and systems for airborne use.

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Keywords: VHF aeronautical mobile service, ground-based radio, amplitude modulation, DSB AM, technical requirements, measurement methods, EN 300 676-1, regulatory compliance, radio interference, channel spacing, type approval, ACARS data, analogue speech communication.

Final draft ETSI EN 300 676-1 V1.5.1 (2010-03)
European Standard (Telecommunications series)

Ground-based VHF hand-held, mobile and fixed radio
transmitters, receivers and transceivers for the VHF
aeronautical mobile service using amplitude modulation;
Part 1:Technical characteristics and
methods of measurement
2 Final draft ETSI EN 300 676-1 V1.5.1 (2010-03)

Reference
REN/ERM-JTFEA-004-1
Keywords
aeronautical, AM, DSB, radio, testing, VHF
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2010.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 Final draft ETSI EN 300 676-1 V1.5.1 (2010-03)
Contents
Intellectual Property Rights . 7
Foreword . 7
Introduction . 7
1 Scope . 9
2 References . 9
2.1 Normative references . 9
2.2 Informative references . 9
3 Definitions and abbreviations . 10
3.1 Definitions . 10
3.2 Abbreviations . 10
4 General requirements . 11
4.1 Controls and indicators . 11
4.2 Class of emission and modulation characteristics . 11
4.3 Warm up . 11
5 Test conditions, power sources and ambient temperatures . 12
5.1 Normal and extreme test conditions . 12
5.2 Test power source . 12
5.3 Normal test conditions . 12
5.3.1 Normal temperature and humidity . 12
5.3.2 Normal power sources . 12
5.3.2.1 Mains voltage and frequency . 12
5.3.2.2 Regulated lead-acid battery power sources used on vehicles . 12
5.3.2.3 Other power sources . 12
5.4 Extreme test conditions . 13
5.4.1 Extreme temperatures . 13
5.4.2 Extreme values of test power sources . 13
5.4.2.1 Mains voltage . 13
5.4.2.2 Other power sources . 13
5.4.3 Extended temperatures . 13
5.5 Performance test . 13
5.6 Environmental tests . 14
5.6.1 General . 14
5.6.2 Procedure for tests at extreme temperatures . 14
5.6.3 Temperature tests . 14
5.6.3.1 High temperature . 14
5.6.3.2 Low temperature . 14
6 General conditions of measurement . 15
6.1 Receiver test signal arrangement . 15
6.1.1 Test signal sources . 15
6.1.2 Nominal frequency . 15
6.1.3 Normal test signal . 15
6.1.4 Squelch . 15
6.1.5 Normal audio output power . 15
6.1.6 Audio AGC . 15
6.2 Transmitter test signal arrangement . 15
6.2.1 Coaxial termination. 15
6.2.2 Signal sources . 15
6.2.3 Normal test signal . 15
6.3 Test channels . 16
7 Transmitter . 16
7.1 Protection of the transmitter . 16
ETSI
4 Final draft ETSI EN 300 676-1 V1.5.1 (2010-03)
7.1.1 Definition . 16
7.1.2 Method of measurement . 16
7.1.3 Requirement . 16
7.2 Frequency error . 16
7.2.1 Definition . 16
7.2.2 Method of measurement . 16
7.2.3 Limits . 17
7.3 Carrier power . 17
7.3.1 Definitions . 17
7.3.2 Method of measurement . 17
7.3.3 Tolerances . 17
7.3.3.1 Normal test conditions . 17
7.3.3.2 Extreme test conditions . 17
7.4 Amplitude modulation characteristic. 18
7.4.1 Modulation depth (speech) . 18
7.4.1.1 Definitions . 18
7.4.1.2 Method of measurement . 18
7.4.1.3 Limits . 18
7.4.1.4 Modulation depth (analogue data mode) . 18
7.4.1.5 Method of measurement . 18
7.4.1.6 Limits . 18
7.4.2 Modulation compression (speech mode) . 18
7.4.2.1 Definition . 18
7.4.2.2 Method of measurement . 18
7.4.2.3 Limits . 19
7.4.3 Amplitude modulation distortion . 19
7.4.3.1 Definition . 19
7.4.3.2 Method of measurement . 19
7.4.3.3 Limits . 19
7.4.4 Audio frequency response . 19
7.4.4.1 Definition . 19
7.4.4.2 Method of measurement . 19
7.4.4.3 Limits 8,33 kHz channel spacing . 20
7.4.4.4 Limits 25 kHz channel spacing . 20
7.4.4.5 Limits 25 kHz channel spacing (Data) . 20
7.4.5 Group delay variation (data mode only) . 20
7.4.5.1 Definition . 20
7.4.5.2 Transmitter method of measurement . 21
7.4.5.3 Limits . 21
7.5 Adjacent channel power . 21
7.5.1 Definition . 21
7.5.2 Measurement. 21
7.5.3 Limits . 22
7.6 Broadband noise measurement . 22
7.6.1 Definition . 22
7.6.2 Method of measurement . 23
7.6.3 Limit . 23
7.7 Conducted spurious emissions . 23
7.7.1 Definition . 23
7.7.2 Method of measurement . 24
7.7.3 Limits . 24
7.8 Intermodulation attenuation. 24
7.8.1 Definition . 24
7.8.2 Method of measurement . 25
7.8.3 Limits . 25
7.9 RF power attack time and release time . 25
7.9.1 Definitions . 25
7.9.2 Method of measurement . 26
7.9.2.1 Attack time . 26
7.9.2.2 Release time . 26
7.9.3 Limits . 27
7.10 Keying Transient frequency behaviour of the transmitter . 27
ETSI
5 Final draft ETSI EN 300 676-1 V1.5.1 (2010-03)
7.10.1 Definitions . 27
7.10.2 Method of measurement . 27
7.10.3 Limits . 27
7.11 Sidetone . 28
7.11.1 Limits . 28
7.12 Cabinet Radiation . 28
8 Receiver . . 28
8.1 Sensitivity . 28
8.1.1 Definition . 28
8.1.2 Method of measurement . 28
8.1.3 Limits . 28
8.2 Harmonic distortion . 29
8.2.1 Definition . 29
8.2.2 Method of measurement . 29
8.2.3 Limits . 29
8.3 Audio frequency response . 29
8.3.1 Definition . 29
8.3.2 Method of measurement . 29
8.3.3 Limits . 29
8.3.4 Limit for DATA operation . 29
8.4 Audio noise . 30
8.4.1 Definition . 30
8.4.2 Method of measurement . 30
8.4.3 Limits . 30
8.5 Effective acceptance bandwidth . 30
8.5.1 Definition . 30
8.5.2 Method of measurement . 30
8.5.3 Limits . 30
8.6 Adjacent channel rejection . 31
8.6.1 Definition . 31
8.6.2 Method of measurement . 31
8.6.3 Limits . 31
8.7 Spurious response rejection . 32
8.7.1 Definition . 32
8.7.2 Introduction to the method of measurement . 32
8.7.3 Method of search of the limited frequency range . 32
8.7.4 Method of measurement . 33
8.7.5 Limit . 33
8.8 Intermodulation response rejection . 33
8.8.1 Definition . 33
8.8.2 Method of measurement . 33
8.8.3 Limit . 34
8.9 Blocking or desensitization . 34
8.9.1 Definition . 34
8.9.2 Method of measurement . 34
8.9.3 Limit . 34
8.10 Conducted spurious emissions . 35
8.10.1 Definition . 35
8.10.2 Method of measuring the power level . 35
8.10.3 Limits . 35
8.11 Squelch operation . 35
8.11.1 Definition . 35
8.11.2 Method of measurement . 35
8.11.3 Limits . 36
8.12 Cross modulation rejection . 36
8.12.1 Definition . 36
8.12.2 Method of measurement . 36
8.12.3 Limits . 37
8.13 Receiver dynamic range . 37
8.13.1 Definition . 37
8.13.2 Method of measurement . 37
ETSI
6 Final draft ETSI EN 300 676-1 V1.5.1 (2010-03)
8.13.3 Limit . 37
8.14 AGC attack time and release time (data mode only) . 37
8.14.1 Definitions . 37
8.14.2 Method of measurement . 37
8.14.2.1 Attack time . 37
8.14.2.2 AGC Decay time . 38
8.14.3 Limits . 38
8.15 AF AGC . 38
8.15.1 Definition . 38
8.15.2 Method of measurement . 38
8.15.3 Limit . 38
8.16 Group delay variation (data mode only) . 38
8.16.1 Definition . 38
8.16.2 Receiver method of measurement . 39
8.16.3 Limits . 39
8.17 Cabinet Radiation . 39
9 Measurement uncertainty and interpretation of the measured results . 39
9.1 Maximum measurement uncertainties . 40
9.2 Interpretation of the measurement results . 40
Annex A (normative): Auxiliary cables . 41
Annex B (normative): Specification for adjacent channel power measurement
arrangements . 42
B.1 Power measuring receiver specification . 42
B.1.1 IF filter . 42
B.1.2 Attenuation indicator . 43
B.1.3 RMS value indicator . 43
B.1.4 Oscillator and amplifier . 43
Annex C (informative): Bibliography . 44
History . 45

ETSI
7 Final draft ETSI EN 300 676-1 V1.5.1 (2010-03)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM), and is now submitted for the ETSI standards One-
step Approval Procedure.
The present document is part 1 of a multi-part deliverable covering the Ground-based VHF hand-held, mobile and fixed
radio transmitters, receivers and transceivers for the VHF aeronautical mobile service using amplitude modulation, as
identified below:
Part 1: "Technical characteristics and methods of measurement";
Part 2: "Harmonized EN covering essential requirements of article 3.2 of the R&TTE Directive".

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

Introduction
The present document states the minimum performance requirements for ground based radio transmitters, transceivers
and receivers for the aeronautical mobile service operating in the VHF band (118 MHz to 136,975 MHz), using Double
Sideband Amplitude Modulation with 8,33 kHz or 25 kHz channel spacing.
For equipment designed to cover the extended VHF frequency band of 108 MHz to 155,975 MHz the same test
methods and procedures may be applied to show technical acceptance of the product in the bands 108 MHz to
7,975 MHz and 137 MHz to 155,975 MHz.
(Additional requirements, outside the scope of the present document, may be required to ensure operation in the
108 MHz to 117,975 MHz band does not cause interference to the FM broadcast band.)
The present document may be used by accredited test laboratories for the assessment of the performance of the
equipment. The performance of the equipment submitted for type testing should be representative for the performance
of the corresponding production model.
ETSI
8 Final draft ETSI EN 300 676-1 V1.5.1 (2010-03)
The present document has been written on the assumption that:
- the type test measurements will be performed only once, in an accredited test laboratory and the measurements
accepted by the various authorities in order to grant type approval;
- if equipment available on the market is required to be checked it will be tested in accordance with the methods
of measurement specified in the present document.
ETSI
9 Final draft ETSI EN 300 676-1 V1.5.1 (2010-03)
1 Scope
The present document states the minimum performance requirements for radio transmitters, receivers and transceivers
at ground-based aeronautical stations operating in the VHF band (118 MHz to 136,975 MHz) allocated to the
aeronautical mobile service.
In situations where transmitters and receivers are located in close proximity there is the possibility of interference. In
such cases, external filters and isolators may be necessary as part of the installation to achieve an isolation performance
in excess of the minima defined in the present document to overcome the interference.
The present document applies to DSB AM systems, with channel separations of 8,33 kHz or 25 kHz intended for
analogue speech and ground base stations with a channel spacing of 25 kHz intended for ACARS data communication.
The test methods and procedures in the present document may also be used to show technical acceptance for radio
transmitters, receivers and transceivers at ground based aeronautical stations operating with 25 kHz channel spacing in
the extended VHF band (108 MHz to 155,975 MHz).
The scope of the present document is limited to ground base stations, ground mobile and hand held radios for ground
use.
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[1] ITU-T Recommendation O.41: "Psophometer for use on telephone-type circuits".
[2] ICAO Annex 10 volume V (1996): "Aeronautical Radio Frequency Spectrum Utilization".
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[i.1] ETSI TR 100 028 (all parts): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics".
ETSI
10 Final draft ETSI EN 300 676-1 V1.5.1 (2010-03)
[i.2] ISO 7637 (parts 1 and 2): "Road vehicles - Electrical disturbances from conduction and coupling".
[i.3] 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.4] ETSI EN 300 113-1: "Electromagnetic compatibility and Radio Matters (ERM): Land mobile
service; Radio equipment intended for the transmission of data (and/or speech) using constant or
non-constant envelope modulation and having an antenna connector: Part 1: Technical
characteristics and methods of measurement".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
aeronautical mobile service: mobile service between aeronautical stations and aircraft stations, or between aircraft
stations, in which survival craft stations may participate
conducted measurements: measurements which are made using a direct RF connection to the equipment under test
ground base station: aeronautical station equipment, in the aeronautical mobile service, for use with an external
antenna and intended for use at a fixed location
hand held: radio equipment with integral batteries, designed to be hand portable and operated hand held
integral antenna equipment: radio communications equipment with an antenna integrated into the equipment without
the use of an external connector and considered to be part of the equipment
NOTE: An integral antenna may be internal or external to the equipment. In equipment of this type, a 50 Ω RF
connection point should be provided for test purposes. A connection point for an AF modulating input
and for AF output measurements should also be provided.
mobile station: radio equipment designed for permanent or temporary vehicle installation and operation, including
provision for vehicle DC power supply, and connections for external antenna, PTT key, microphone, speaker and/or
headphone
non-integral antenna equipment: radio communications equipment with a connector intended for connection to an
antenna
portable station: radio equipment with integral battery for independent hand-carried use
NOTE: Provisions may be made for connections of an external antenna, PTT key, microphone, headphone and
charger, but principally to be operated as a self contained unit.
radiated measurements: measurements which involve the measurement of a radiated field
3.2 Abbreviations
...

European Standard (Telecommunications series)

Ground-based VHF hand-held, mobile and fixed radio
transmitters, receivers and transceivers for the VHF
aeronautical mobile service using amplitude modulation;
Part 1:Technical characteristics and
methods of measurement
2 ETSI EN 300 676-1 V1.5.1 (2010-07)

Reference
REN/ERM-JTFEA-004-1
Keywords
aeronautical, AM, DSB, radio, testing, VHF
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2010.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 ETSI EN 300 676-1 V1.5.1 (2010-07)
Contents
Intellectual Property Rights . 7
Foreword . 7
Introduction . 7
1 Scope . 9
2 References . 9
2.1 Normative references . 9
2.2 Informative references . 9
3 Definitions and abbreviations . 10
3.1 Definitions . 10
3.2 Abbreviations . 10
4 General requirements . 11
4.1 Controls and indicators . 11
4.2 Class of emission and modulation characteristics . 11
4.3 Warm up . 11
5 Test conditions, power sources and ambient temperatures . 11
5.1 Normal and extreme test conditions . 11
5.2 Test power source . 12
5.3 Normal test conditions . 12
5.3.1 Normal temperature and humidity . 12
5.3.2 Normal power sources . 12
5.3.2.1 Mains voltage and frequency . 12
5.3.2.2 Regulated lead-acid battery power sources used on vehicles . 12
5.3.2.3 Other power sources . 12
5.4 Extreme test conditions . 12
5.4.1 Extreme temperatures . 12
5.4.2 Extreme values of test power sources . 13
5.4.2.1 Mains voltage . 13
5.4.2.2 Other power sources . 13
5.4.3 Extended temperatures . 13
5.5 Performance test . 13
5.6 Environmental tests . 13
5.6.1 General . 13
5.6.2 Procedure for tests at extreme temperatures . 14
5.6.3 Temperature tests . 14
5.6.3.1 High temperature . 14
5.6.3.2 Low temperature . 14
6 General conditions of measurement . 14
6.1 Receiver test signal arrangement . 14
6.1.1 Test signal sources . 14
6.1.2 Nominal frequency . 14
6.1.3 Normal test signal . 15
6.1.4 Squelch . 15
6.1.5 Normal audio output power . 15
6.1.6 Audio AGC . 15
6.2 Transmitter test signal arrangement . 15
6.2.1 Coaxial termination. 15
6.2.2 Signal sources . 15
6.2.3 Normal test signal . 15
6.3 Test channels . 15
7 Transmitter . 15
7.1 Protection of the transmitter . 16
ETSI
4 ETSI EN 300 676-1 V1.5.1 (2010-07)
7.1.1 Definition . 16
7.1.2 Method of measurement . 16
7.1.3 Requirement . 16
7.2 Frequency error . 16
7.2.1 Definition . 16
7.2.2 Method of measurement . 16
7.2.3 Limits . 16
7.3 Carrier power . 17
7.3.1 Definitions . 17
7.3.2 Method of measurement . 17
7.3.3 Tolerances . 17
7.3.3.1 Normal test conditions . 17
7.3.3.2 Extreme test conditions . 17
7.4 Amplitude modulation characteristic. 17
7.4.1 Modulation depth (speech) . 17
7.4.1.1 Definitions . 17
7.4.1.2 Method of measurement . 17
7.4.1.3 Limits . 18
7.4.1.4 Modulation depth (analogue data mode) . 18
7.4.1.5 Method of measurement . 18
7.4.1.6 Limits . 18
7.4.2 Modulation compression (speech mode) . 18
7.4.2.1 Definition . 18
7.4.2.2 Method of measurement . 18
7.4.2.3 Limits . 18
7.4.3 Amplitude modulation distortion . 19
7.4.3.1 Definition . 19
7.4.3.2 Method of measurement . 19
7.4.3.3 Limits . 19
7.4.4 Audio frequency response . 19
7.4.4.1 Definition . 19
7.4.4.2 Method of measurement . 19
7.4.4.3 Limits 8,33 kHz channel spacing . 19
7.4.4.4 Limits 25 kHz channel spacing . 19
7.4.4.5 Limits 25 kHz channel spacing (Data) . 20
7.4.5 Group delay variation (data mode only) . 20
7.4.5.1 Definition . 20
7.4.5.2 Transmitter method of measurement . 20
7.4.5.3 Limits . 20
7.5 Adjacent channel power . 20
7.5.1 Definition . 20
7.5.2 Measurement. 21
7.5.3 Limits . 21
7.6 Broadband noise measurement . 21
7.6.1 Definition . 21
7.6.2 Method of measurement . 22
7.6.3 Limit . 22
7.7 Conducted spurious emissions . 22
7.7.1 Definition . 22
7.7.2 Method of measurement . 23
7.7.3 Limits . 23
7.8 Intermodulation attenuation. 23
7.8.1 Definition . 23
7.8.2 Method of measurement . 24
7.8.3 Limits . 24
7.9 RF power attack time and release time . 24
7.9.1 Definitions . 24
7.9.2 Method of measurement . 25
7.9.2.1 Attack time . 25
7.9.2.2 Release time . 25
7.9.3 Limits . 26
7.10 Keying Transient frequency behaviour of the transmitter . 26
ETSI
5 ETSI EN 300 676-1 V1.5.1 (2010-07)
7.10.1 Definitions . 26
7.10.2 Method of measurement . 26
7.10.3 Limits . 26
7.11 Sidetone . 27
7.11.1 Limits . 27
7.12 Cabinet Radiation . 27
8 Receiver . . 27
8.1 Sensitivity . 27
8.1.1 Definition . 27
8.1.2 Method of measurement . 27
8.1.3 Limits . 27
8.2 Harmonic distortion . 28
8.2.1 Definition . 28
8.2.2 Method of measurement . 28
8.2.3 Limits . 28
8.3 Audio frequency response . 28
8.3.1 Definition . 28
8.3.2 Method of measurement . 28
8.3.3 Limits . 28
8.3.4 Limit for DATA operation . 28
8.4 Audio noise . 29
8.4.1 Definition . 29
8.4.2 Method of measurement . 29
8.4.3 Limits . 29
8.5 Effective acceptance bandwidth . 29
8.5.1 Definition . 29
8.5.2 Method of measurement . 29
8.5.3 Limits . 29
8.6 Adjacent channel rejection . 30
8.6.1 Definition . 30
8.6.2 Method of measurement . 30
8.6.3 Limits . 30
8.7 Spurious response rejection . 30
8.7.1 Definition . 31
8.7.2 Introduction to the method of measurement . 31
8.7.3 Method of search of the limited frequency range . 31
8.7.4 Method of measurement . 31
8.7.5 Limit . 32
8.8 Intermodulation response rejection . 32
8.8.1 Definition . 32
8.8.2 Method of measurement . 32
8.8.3 Limit . 32
8.9 Blocking or desensitization . 33
8.9.1 Definition . 33
8.9.2 Method of measurement . 33
8.9.3 Limit . 33
8.10 Conducted spurious emissions . 33
8.10.1 Definition . 33
8.10.2 Method of measuring the power level . 33
8.10.3 Limits . 34
8.11 Squelch operation . 34
8.11.1 Definition . 34
8.11.2 Method of measurement . 34
8.11.3 Limits . 34
8.12 Cross modulation rejection . 35
8.12.1 Definition . 35
8.12.2 Method of measurement . 35
8.12.3 Limits . 35
8.13 Receiver dynamic range . 35
8.13.1 Definition . 35
8.13.2 Method of measurement . 35
ETSI
6 ETSI EN 300 676-1 V1.5.1 (2010-07)
8.13.3 Limit . 36
8.14 AGC attack time and release time (data mode only) . 36
8.14.1 Definitions . 36
8.14.2 Method of measurement . 36
8.14.2.1 Attack time . 36
8.14.2.2 AGC Decay time . 36
8.14.3 Limits . 36
8.15 AF AGC . 37
8.15.1 Definition . 37
8.15.2 Method of measurement . 37
8.15.3 Limit . 37
8.16 Group delay variation (data mode only) . 37
8.16.1 Definition . 37
8.16.2 Receiver method of measurement . 37
8.16.3 Limits . 38
8.17 Cabinet Radiation . 38
9 Measurement uncertainty and interpretation of the measured results . 38
9.1 Maximum measurement uncertainties . 38
9.2 Interpretation of the measurement results . 39
Annex A (normative): Auxiliary cables . 40
Annex B (normative): Specification for adjacent channel power measurement
arrangements . 41
B.1 Power measuring receiver specification . 41
B.1.1 IF filter . 41
B.1.2 Attenuation indicator . 42
B.1.3 RMS value indicator . 42
B.1.4 Oscillator and amplifier . 42
Annex C (informative): Bibliography . 43
History . 44

ETSI
7 ETSI EN 300 676-1 V1.5.1 (2010-07)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM).
The present document is part 1 of a multi-part deliverable covering the Ground-based VHF hand-held, mobile and fixed
radio transmitters, receivers and transceivers for the VHF aeronautical mobile service using amplitude modulation, as
identified below:
Part 1: "Technical characteristics and methods of measurement";
Part 2: "Harmonized EN covering essential requirements of article 3.2 of the R&TTE Directive".

National transposition dates
Date of adoption of this EN: 15 July 2010
Date of latest announcement of this EN (doa): 31 October 2010
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 April 2011
Date of withdrawal of any conflicting National Standard (dow): 30 April 2011

Introduction
The present document states the minimum performance requirements for ground based radio transmitters, transceivers
and receivers for the aeronautical mobile service operating in the VHF band (118 MHz to 136,975 MHz), using Double
Sideband Amplitude Modulation with 8,33 kHz or 25 kHz channel spacing.
NOTE: For equipment designed to cover the extended VHF frequency bands 108 MHz to 117,975 MHz and
137 MHz to 155,975 MHz the same test methods and procedures may be applied to show technical
acceptance of the product in the band 108 MHz to 155,975 MHz.
Additional requirements, outside the scope of the present document, may be required to ensure operation
in the 108 MHz to 117,975 MHz band does not cause interference to the FM broadcast band.
The present document may be used by accredited test laboratories for the assessment of the performance of the
equipment. The performance of the equipment submitted for type testing should be representative for the performance
of the corresponding production model.
ETSI
8 ETSI EN 300 676-1 V1.5.1 (2010-07)
The present document has been written on the assumption that:
- the type test measurements will be performed only once, in an accredited test laboratory and the measurements
accepted by the various authorities in order to grant type approval;
- if equipment available on the market is required to be checked it will be tested in accordance with the methods
of measurement specified in the present document.
ETSI
9 ETSI EN 300 676-1 V1.5.1 (2010-07)
1 Scope
The present document states the minimum performance requirements for radio transmitters, receivers and transceivers
at ground-based aeronautical stations operating in the VHF band (118 MHz to 136,975 MHz) allocated to the
aeronautical mobile service.
In situations where transmitters and receivers are located in close proximity there is the possibility of interference. In
such cases, external filters and isolators may be necessary as part of the installation to achieve an isolation performance
in excess of the minima defined in the present document to overcome the interference.
The present document applies to DSB AM systems, with channel separations of 8,33 kHz or 25 kHz intended for
analogue speech and ground base stations with a channel spacing of 25 kHz intended for ACARS data communication.
NOTE: The test methods and procedures in the present document may also be used to show technical acceptance
for radio transmitters, receivers and transceivers at ground based aeronautical stations operating with
25 kHz channel spacing in the extended VHF bands (108 MHz to 117,975 MHz and 137 MHz to
155,975 MHz).
The scope of the present document is limited to ground base stations, ground mobile and hand held radios for ground
use.
2 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
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://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.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] ITU-T Recommendation O.41: "Psophometer for use on telephone-type circuits".
[2] ICAO Annex 10 Volume V (July 2001, including amendments up to amendment 84):
"Aeronautical Radio Frequency Spectrum Utilization".
2.2 Informative references
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] ETSI TR 100 028 (all parts): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics".
[i.2] ISO 7637 (parts 1 and 2): "Road vehicles - Electrical disturbances from conduction and coupling".
[i.3] 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).
ETSI
10 ETSI EN 300 676-1 V1.5.1 (2010-07)
[i.4] ETSI EN 300 113-1: "Electromagnetic compatibility and Radio Matters (ERM): Land mobile
service; Radio equipment intended for the transmission of data (and/or speech) using constant or
non-constant envelope modulation and having an antenna connector: Part 1: Technical
characteristics and methods of measurement".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
aeronautical mobile service: mobile service between aeronautical stations and aircraft stations, or between aircraft
stations, in which survival craft stations may participate
conducted measurements: measurements which are made using a direct RF connection to the equipment under test
ground base station: aeronautical station equipment, in the aeronautical mobile service, for use with an external
antenna and intended for use at a fixed location
hand held: radio equipment with integral batteries, designed to be hand portable and operated hand held
integral antenna equipment: radio communications equipment with an antenna integrated into the equipment without
the use of an external connector and considered to be part of the equipment
NOTE: An integral antenna may be internal or external to the equipment. In equipment of this type, a 50 Ω RF
connection point should be provided for test purposes. A connection point for an AF modulating input
and for AF output measurements should also be provided.
mobile station: radio equipment designed for permanent or temporary vehicle installation and operation, including
provision for vehicle DC power supply, and connections for external antenna, PTT key, microphone, speaker and/or
headphone
non-integral antenna equipment: radio communications equipment with a connector intended for connection to an
antenna
portable station: radio equipment with integral battery for independent hand-carried use
NOTE: Provisions may be made for connections of an external antenna, PTT key, microphone, headphone and
charger, but principally to be operated as a self contained unit.
radiated measurements: measurements which involve the measurement of a radiated field
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACARS Aircraft Communications Addressing and Reporting System
AF Audio Frequency
AGC Automatic Gain Control
AM Amplitude Modulation
dBc dB relative to the carrier power
DSB Double Side Band
ICAO International Civil Aviation Organization
IF Intermediate Frequency
ppm parts per million
RF Radio Frequency
rms root mean square
SINAD (Signal + Noise + Distortion)/(Noise + Distortion)
VSWR Voltage Standing Wave Ratio
ETSI
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.LWXGQR49.090On-board equipment and instruments33.060.20Sprejemna in oddajna opremaReceiving and transmitting equipmentICS:Ta slovenski standard je istoveten z:EN 300 676-1 Version 1.5.1SIST EN 300 676-1 V1.5.1:2010en01-oktober-2010SIST EN 300 676-1 V1.5.1:2010SLOVENSKI
STANDARD
ETSI ETSI EN 300 676-1 V1.5.1 (2010-07) 2
Reference REN/ERM-JTFEA-004-1 Keywords aeronautical, AM, DSB, radio, testing, VHF ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: [phone]
Fax: [phone]
Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88
Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2010. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE™ is a Trade Mark of ETSI currently being registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. SIST EN 300 676-1 V1.5.1:2010

ETSI ETSI EN 300 676-1 V1.5.1 (2010-07) 3 Contents Intellectual Property Rights . 7 Foreword . 7 Introduction . 7 1 Scope . 9 2 References . 9 2.1 Normative references . 9 2.2 Informative references . 9 3 Definitions and abbreviations . 10 3.1 Definitions . 10 3.2 Abbreviations . 10 4 General requirements . 11 4.1 Controls and indicators . 11 4.2 Class of emission and modulation characteristics . 11 4.3 Warm up . 11 5 Test conditions, power sources and ambient temperatures . 11 5.1 Normal and extreme test conditions . 11 5.2 Test power source . 12 5.3 Normal test conditions . 12 5.3.1 Normal temperature and humidity . 12 5.3.2 Normal power sources . 12 5.3.2.1 Mains voltage and frequency . 12 5.3.2.2 Regulated lead-acid battery power sources used on vehicles . 12 5.3.2.3 Other power sources . 12 5.4 Extreme test conditions . 12 5.4.1 Extreme temperatures . 12 5.4.2 Extreme values of test power sources . 13 5.4.2.1 Mains voltage . 13 5.4.2.2 Other power sources . 13 5.4.3 Extended temperatures . 13 5.5 Performance test . 13 5.6 Environmental tests . 13 5.6.1 General . 13 5.6.2 Procedure for tests at extreme temperatures . 14 5.6.3 Temperature tests . 14 5.6.3.1 High temperature . 14 5.6.3.2 Low temperature . 14 6 General conditions of measurement . 14 6.1 Receiver test signal arrangement . 14 6.1.1 Test signal sources . 14 6.1.2 Nominal frequency . 14 6.1.3 Normal test signal . 15 6.1.4 Squelch . 15 6.1.5 Normal audio output power . 15 6.1.6 Audio AGC . 15 6.2 Transmitter test signal arrangement . 15 6.2.1 Coaxial termination. 15 6.2.2 Signal sources . 15 6.2.3 Normal test signal . 15 6.3 Test channels . 15 7 Transmitter . 15 7.1 Protection of the transmitter . 16 SIST EN 300 676-1 V1.5.1:2010

ETSI ETSI EN 300 676-1 V1.5.1 (2010-07) 4 7.1.1 Definition . 16 7.1.2 Method of measurement . 16 7.1.3 Requirement . 16 7.2 Frequency error . 16 7.2.1 Definition . 16 7.2.2 Method of measurement . 16 7.2.3 Limits . 16 7.3 Carrier power . 17 7.3.1 Definitions . 17 7.3.2 Method of measurement . 17 7.3.3 Tolerances . 17 7.3.3.1 Normal test conditions . 17 7.3.3.2 Extreme test conditions . 17 7.4 Amplitude modulation characteristic. 17 7.4.1 Modulation depth (speech) . 17 7.4.1.1 Definitions . 17 7.4.1.2 Method of measurement . 17 7.4.1.3 Limits . 18 7.4.1.4 Modulation depth (analogue data mode) . 18 7.4.1.5 Method of measurement . 18 7.4.1.6 Limits . 18 7.4.2 Modulation compression (speech mode) . 18 7.4.2.1 Definition . 18 7.4.2.2 Method of measurement . 18 7.4.2.3 Limits . 18 7.4.3 Amplitude modulation distortion . 19 7.4.3.1 Definition . 19 7.4.3.2 Method of measurement . 19 7.4.3.3 Limits . 19 7.4.4 Audio frequency response . 19 7.4.4.1 Definition . 19 7.4.4.2 Method of measurement . 19 7.4.4.3 Limits 8,33 kHz channel spacing . 19 7.4.4.4 Limits 25 kHz channel spacing . 19 7.4.4.5 Limits 25 kHz channel spacing (Data) . 20 7.4.5 Group delay variation (data mode only) . 20 7.4.5.1 Definition . 20 7.4.5.2 Transmitter method of measurement . 20 7.4.5.3 Limits . 20 7.5 Adjacent channel power . 20 7.5.1 Definition . 20 7.5.2 Measurement. 21 7.5.3 Limits . 21 7.6 Broadband noise measurement . 21 7.6.1 Definition . 21 7.6.2 Method of measurement . 22 7.6.3 Limit . 22 7.7 Conducted spurious emissions . 22 7.7.1 Definition . 22 7.7.2 Method of measurement . 23 7.7.3 Limits . 23 7.8 Intermodulation attenuation. 23 7.8.1 Definition . 23 7.8.2 Method of measurement . 24 7.8.3 Limits . 24 7.9 RF power attack time and release time . 24 7.9.1 Definitions . 24 7.9.2 Method of measurement . 25 7.9.2.1 Attack time . 25 7.9.2.2 Release time . 25 7.9.3 Limits . 26 7.10 Keying Transient frequency behaviour of the transmitter . 26 SIST EN 300 676-1 V1.5.1:2010

ETSI ETSI EN 300 676-1 V1.5.1 (2010-07) 5 7.10.1 Definitions . 26 7.10.2 Method of measurement . 26 7.10.3 Limits . 26 7.11 Sidetone . 27 7.11.1 Limits . 27 7.12 Cabinet Radiation . 27 8 Receiver . 27 8.1 Sensitivity . 27 8.1.1 Definition . 27 8.1.2 Method of measurement . 27 8.1.3 Limits . 27 8.2 Harmonic distortion . 28 8.2.1 Definition . 28 8.2.2 Method of measurement . 28 8.2.3 Limits . 28 8.3 Audio frequency response . 28 8.3.1 Definition . 28 8.3.2 Method of measurement . 28 8.3.3 Limits . 28 8.3.4 Limit for DATA operation . 28 8.4 Audio noise . 29 8.4.1 Definition . 29 8.4.2 Method of measurement . 29 8.4.3 Limits . 29 8.5 Effective acceptance bandwidth . 29 8.5.1 Definition . 29 8.5.2 Method of measurement . 29 8.5.3 Limits . 29 8.6 Adjacent channel rejection . 30 8.6.1 Definition . 30 8.6.2 Method of measurement . 30 8.6.3 Limits . 30 8.7 Spurious response rejection . 30 8.7.1 Definition . 31 8.7.2 Introduction to the method of measurement . 31 8.7.3 Method of search of the limited frequency range . 31 8.7.4 Method of measurement . 31 8.7.5 Limit . 32 8.8 Intermodulation response rejection . 32 8.8.1 Definition . 32 8.8.2 Method of measurement . 32 8.8.3 Limit . 32 8.9 Blocking or desensitization . 33 8.9.1 Definition . 33 8.9.2 Method of measurement . 33 8.9.3 Limit . 33 8.10 Conducted spurious emissions . 33 8.10.1 Definition . 33 8.10.2 Method of measuring the power level . 33 8.10.3 Limits . 34 8.11 Squelch operation . 34 8.11.1 Definition . 34 8.11.2 Method of measurement . 34 8.11.3 Limits . 34 8.12 Cross modulation rejection . 35 8.12.1 Definition . 35 8.12.2 Method of measurement . 35 8.12.3 Limits . 35 8.13 Receiver dynamic range . 35 8.13.1 Definition . 35 8.13.2 Method of measurement . 35 SIST EN 300 676-1 V1.5.1:2010

ETSI ETSI EN 300 676-1 V1.5.1 (2010-07) 6 8.13.3 Limit . 36 8.14 AGC attack time and release time (data mode only) . 36 8.14.1 Definitions . 36 8.14.2 Method of measurement . 36 8.14.2.1 Attack time . 36 8.14.2.2 AGC Decay time . 36 8.14.3 Limits . 36 8.15 AF AGC . 37 8.15.1 Definition . 37 8.15.2 Method of measurement . 37 8.15.3 Limit . 37 8.16 Group delay variation (data mode only) . 37 8.16.1 Definition . 37 8.16.2 Receiver method of measurement . 37 8.16.3 Limits . 38 8.17 Cabinet Radiation . 38 9 Measurement uncertainty and interpretation of the measured results . 38 9.1 Maximum measurement uncertainties . 38 9.2 Interpretation of the measurement results . 39 Annex A (normative): Auxiliary cables . 40 Annex B (normative): Specification for adjacent channel power measurement arrangements . 41 B.1 Power measuring receiver specification . 41 B.1.1 IF filter . 41 B.1.2 Attenuation indicator . 42 B.1.3 RMS value indicator . 42 B.1.4 Oscillator and amplifier . 42 Annex C (informative): Bibliography . 43 History . 44
ETSI ETSI EN 300 676-1 V1.5.1 (2010-07) 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 (http://webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Electromagnetic compatibility and Radio spectrum Matters (ERM). The present document is part 1 of a multi-part deliverable covering the Ground-based VHF hand-held, mobile and fixed radio transmitters, receivers and transceivers for the VHF aeronautical mobile service using amplitude modulation, as identified below: Part 1: "Technical characteristics and methods of measurement"; Part 2: "Harmonized EN covering essential requirements of article 3.2 of the R&TTE Directive".
National transposition dates Date of adoption of this EN: 15 July 2010 Date of latest announcement of this EN (doa): 31 October 2010 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
30 April 2011 Date of withdrawal of any conflicting National Standard (dow): 30 April 2011
Introduction The present document states the minimum performance requirements for ground based radio transmitters, transceivers and receivers for the aeronautical mobile service operating in the VHF band (118 MHz to 136,975 MHz), using Double Sideband Amplitude Modulation with 8,33 kHz or 25 kHz channel spacing. NOTE: For equipment designed to cover the extended VHF frequency bands 108 MHz to 117,975 MHz and 137 MHz to 155,975 MHz the same test methods and procedures may be applied to show technical acceptance of the product in the band 108 MHz to 155,975 MHz.
Additional requirements, outside the scope of the present document, may be required to ensure operation in the 108 MHz to 117,975 MHz band does not cause interference to the FM broadcast band. The present document may be used by accredited test laboratories for the assessment of the performance of the equipment. The performance of the equipment submitted for type testing should be representative for the performance of the corresponding production model. SIST EN 300 676-1 V1.5.1:2010

ETSI ETSI EN 300 676-1 V1.5.1 (2010-07) 8 The present document has been written on the assumption that: - the type test measurements will be performed only once, in an accredited test laboratory and the measurements accepted by the various authorities in order to grant type approval; - if equipment available on the market is required to be checked it will be tested in accordance with the methods of measurement specified in the present document. SIST EN 300 676-1 V1.5.1:2010

ETSI ETSI EN 300 676-1 V1.5.1 (2010-07) 9 1 Scope The present document states the minimum performance requirements for radio transmitters, receivers and transceivers at ground-based aeronautical stations operating in the VHF band (118 MHz to 136,975 MHz) allocated to the aeronautical mobile service. In situations where transmitters and receivers are located in close proximity there is the possibility of interference. In such cases, external filters and isolators may be necessary as part of the installation to achieve an isolation performance in excess of the minima defined in the present document to overcome the interference. The present document applies to DSB AM systems, with channel separations of 8,33 kHz or 25 kHz intended for analogue speech and ground base stations with a channel spacing of 25 kHz intended for ACARS data communication. NOTE: The test methods and procedures in the present document may also be used to show technical acceptance for radio transmitters, receivers and transceivers at ground based aeronautical stations operating with 25 kHz channel spacing in the extended VHF bands (108 MHz to 117,975 MHz and 137 MHz to 155,975 MHz). The scope of the present document is limited to ground base stations, ground mobile and hand held radios for ground use. 2 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 reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://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. 2.1 Normative references The following referenced documents are necessary for the application of the present document. [1] ITU-T Recommendation O.41: "Psophometer for use on telephone-type circuits". [2] ICAO Annex 10 Volume V (July 2001, including amendments up to amendment 84): "Aeronautical Radio Frequency Spectrum Utilization". 2.2 Informative references 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] ETSI TR 100 028 (all parts): "Electromagnetic compatibility and Radio spectrum Matters (ERM); Uncertainties in the measurement of mobile radio equipment characteristics". [i.2] ISO 7637 (parts 1 and 2): "Road vehicles - Electrical disturbances from conduction and coupling". [i.3] 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). SIST EN 300 676-1 V1.5.1:2010

ETSI ETSI EN 300 676-1 V1.5.1 (2010-07) 10 [i.4] ETSI EN 300 113-1: "Electromagnetic compatibility and Radio Matters (ERM): Land mobile service; Radio equipment intended for the transmission of data (and/or speech) using constant or non-constant envelope modulation and having an antenna connector: Part 1: Technical characteristics and methods of measurement". 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: aeronautical mobile service: mobile service between aeronautical stations and aircraft stations, or between aircraft stations, in which survival craft stations may participate conducted measurements: measurements which are made using a direct RF connection to the equipment under test ground base station: aeronautical station equipment, in the aeronautical mobile service, for use with an external antenna and intended for use at a fixed location hand held: radio equipment with integral batteries, designed to be hand portable and operated hand held integral antenna equipment: radio communications equipment with an antenna integrated into the equipment without the use of an external connector and considered to be part of the equipment NOTE: An integral antenna may be internal or external to the equipment. In equipment of this type, a 50 Ω RF connection point should be provided for test purposes. A connection point for an AF modulating input and for AF output measurements should also be provided. mobile station: radio equipment designed for permanent or temporary vehicle installation and operation, including provision for vehicle DC power supply, and connections for external antenna, PTT key, microphone, speaker and/or headphone non-integral antenna equipment: radio communications equipment with a connector intended for connection to an antenna portable station: radio equipment with integral battery for independent hand-carried use NOTE: Provisions may be made for connections of an external antenna, PTT key, microphone, headphone and charger, but principally to be operated as a self contained unit. radiated measurements: measurements which involve the measurement of a radiated field 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ACARS Aircraft Communications Addressing and Reporting System AF Audio Frequency AGC Automatic Gain Control AM Amplitude Modulation dBc dB relative to the carrier power DSB Double Side Band ICAO International Civil Aviation Organization IF Intermediate Frequency ppm parts per million RF Radio Frequency rms root mean square SINAD (Signal + Noise + Distortion)/(Noise + Distortion) VSWR Voltage Standing Wave Ratio SIST EN 300 676-1 V1.5.1:2010

ETSI ETSI EN 300 676-1 V1.5.1 (2010-07) 11 4 General requirements 8,33 kHz equipment shall be able to operate on all channels in the List of Assignable Frequencies defined in Appendix 2, chapter 4, Group F (see clause 4.1.8.1.2) of the
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