ETSI EN 302 842-2 V1.3.1 (2011-09)

European Standard
VHF air-ground and air-air Digital Link (VDL)
Mode 4 radio equipment;
Technical characteristics and methods of measurement
for aeronautical mobile (airborne) equipment;
Part 2: General description and data link layer

2 ETSI EN 302 842-2 V1.3.1 (2011-09)

Reference
REN/AERO-00007-2
Keywords
aeronautical, digital, radio, testing, VHF
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 - 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 2011.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI 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 302 842-2 V1.3.1 (2011-09)
Contents
Intellectual Property Rights . 8
Foreword . 8
Introduction . 9
1 Scope . 10
2 References . 12
2.1 Normative references . 12
2.2 Informative references . 13
3 Definitions and abbreviations . 13
3.1 Definitions . 13
3.1.1 Basic reference model definitions . 13
3.1.2 Service conventions definitions . 13
3.1.3 General definitio ns . 14
3.1.4 Definition of bit order . 17
3.2 Abbreviations . 17
4 General description of VDL Mode 4 mobile station link layer . 19
4.1 Overview of VDL Mode 4 . 19
4.1.1 Void . 19
4.1.2 Relationship to OSI reference model . 19
4.1.3 VDL Mode 4 services . 21
4.1.4 ADS-B function . 21
4.1.5 Operational scenarios . 22
4.1.6 VDL Mode 4 fundamentals . 22
4.1.7 Possible configuration of airborne equipment . 23
4.1.8 Classes of equipment . 25
4.1.9 Transceiver cross-links . 25
4.1.10 Overall structure of specifications for VDL Mode 4 . 25
4.1.11 Equipment performance verification . 27
5 Minimum performance specification under standard test conditions . 28
5.1 MAC sublayer . 28
5.1.1 Services . 28
5.1.2 MAC sublayer services . 28
5.1.3 MAC sublayer parameters . 28
5.1.3.1 General . 28
5.1.3.2 Parameter M1 (number of slots per superframe) . 29
5.1.3.3 Parameter M2_inc and M2_limit (MAC layer control parameters for network entry) . 29
5.1.3.4 Inspection of m2 filter following transceiver failure . 30
5.1.4 Time synchronization . 30
5.1.4.1 Primary . 30
5.1.4.2 Secondary . 30
5.1.4.3 Alignment to UTC second . 31
5.1.4.4 Data quality level . 31
5.1.5 Slot idle/busy notification . 31
5.1.5.1 Slot idle detection . 31
5.1.5.2 Slot busy detection . 31
5.1.5.3 Slot occupied detection . 31
5.1.5.4 Signal level indication . 31
5.1.6 Transmission processing . 32
5.1.7 Received transmission processing . 32
5.2 VSS sublayer . 32
5.2.1 Services . 33
5.2.1a Multiple access . 33
5.2.1.1 Error detection . 33
5.2.1.2 Channel congestion . 33
ETSI
4 ETSI EN 302 842-2 V1.3.1 (2011-09)
5.2.2 Burst format . 34
5.2.2.1 VSS burst structure . 34
5.2.2.2 Version number . 35
5.2.2.3 Source address . 35
5.2.2.4 Message ID . 35
5.2.2.5 Information field . 36
5.2.2.6 Reservation fields . 36
5.2.2.7 Autonomous/directed flag . 36
5.2.3 VSS sublayer parameters . 37
5.2.3.1 General . 37
5.2.3.2 Parameter VS1 (number of ground quarantined slots) . 37
5.2.3.3 Parameter VS2 (minimum CCI performance) . 38
5.2.3.4 Parameter VS4 (quarantine slot re-use range) . 38
5.2.3.5 Parameter VS5 (maximum burst length) . 38
5.2.4 VSS quality of service parameters . 39
5.2.4.1 General . 39
5.2.4.2 Parameter Q1 (priority) . 39
5.2.4.3 Parameters Q2a to Q2d (slot selection range constraint for level n) . 40
5.2.4.4 Parameter Q3 (replace queued data) . 40
5.2.4.5 Parameter Q4 (number of available slots) . 41
5.2.5 Received transmission processing . 41
5.2.6 Reserved access protocol specification . 42
5.2.6.1 Reservation table . 42
5.2.6.2 Selecting slots for transmission or reservation . 43
5.2.6.3 Reserved transmissions . 44
5.2.6.4 Reservation conflicts . 45
5.2.6.5 Transmission conflicts for mobile stations . 45
5.2.7 Random access protocol specification . 46
5.2.7.1 General . 46
5.2.7.2 Random access parameters. 46
5.2.7.3 Random access procedures. 48
5.2.8 Void . 49
5.2.9 Null reservation protocol specification . 49
5.2.9.1 Null reservation burst format . 49
5.2.10 Periodic broadcast protocol specification . 49
5.2.10.1 Periodic broadcast reservation burst format . 49
5.2.10.2 Periodic broadcast timers . 50
5.2.10.3 Periodic broadcast parameters . 50
5.2.10.4 Periodic broadcast reception procedures . 51
5.2.10.5 Periodic broadcast transmission procedures . 52
5.2.11 Incremental broadcast protocol specification . 55
5.2.11.1 Incremental broadcast reservation burst format . 55
5.2.11.2 Incremental broadcast parameters . 55
5.2.11.3 Incremental broadcast reception procedures . 56
5.2.11.4 Incremental broadcast transmission procedures . 56
5.2.12 Combined periodic broadcast and incremental broadcast protocol specification . 57
5.2.12.1 Combined periodic broadcast and incremental broadcast reservation burst. 57
5.2.13 Big negative dither (BND) broadcast protocol specifications . 57
5.2.13.1 BND reservation burst format . 57
5.2.13.2 BND broadcast parameters. 58
5.2.13.3 BND broadcast reception procedures . 58
5.2.13.4 BND broadcast transmission procedures . 58
5.2.14 Unicast request protocol specification . 58
5.2.14.1 Unicast request reservation burst format . 58
5.2.14.1a Unicast request parameters. 59
5.2.14.2 Unicast request reception procedures . 60
5.2.14.3 Unicast request transmission procedures . 61
5.2.15 Information transfer request protocol specification . 61
5.2.15.1 Information transfer request reservation burst format . 61
5.2.15.2 Information transfer request reception procedures . 63
5.2.16 Directed request protocol specification. 63
5.2.16.1 Directed request reservation burst format . 63
ETSI
5 ETSI EN 302 842-2 V1.3.1 (2011-09)
5.2.16.2 Directed request parameters . 66
5.2.16.3 Directed request reception procedures . 67
5.2.16.4 Directed request transmission procedures . 68
5.2.16.5 Directed request response procedures . 69
5.2.17 Block reservation protocols specification . 70
5.2.17.1 Superframe block reservation burst format . 70
5.2.17.2 Second frame block reservation burst format . 71
5.2.17.3 Void. 72
5.2.17.4 Superframe block reservation reception procedures . 72
5.2.17.5 Second frame block reservation parameters . 74
5.2.17.6 Second frame block reservation reception procedures . 74
5.2.17.7 Void. 74
5.2.17.7a Procedures for responding to a rebroadcast request for superframe block reservation . 74
5.2.18 Response protocol specification . 75
5.2.18.1 Response burst format . 75
5.2.19 General request protocol specification . 75
5.2.19.1 General request burst format . 75
5.2.19.2 General request procedures . 76
5.2.20 General response protocol specification . 76
5.2.20.1 General response burst format. 76
5.2.20.2 General response procedures . 78
5.2.21 Retransmission procedures . 78
5.3 DLS sublayer . 79
5.3.1 Services . 79
5.3.1.1 General . 79
5.3.1.2 Data transfer . 79
5.3.1.3 Station address encoding . 79
5.3.1.4 DLS burst formats . 81
5.3.2 DLS system parameters . 82
5.3.2.1 Parameter ND4 (maximum length of a UDATA burst) . 82
5.3.3 DLS procedures . 82
5.3.3.1 Broadcast . 82
5.3.3.2 DLS not supported . 82
5.3.3.3 User data packet reception . 83
5.3.3.4 CTRL DLPDU . 83
5.4 Link Management Entity (LME) sublayer . 83
5.4.1 Services . 83
5.4.2 Synchronization burst format . 83
5.4.2.1 General . 83
5.4.2.2 Fixed and variable data fields. 83
5.4.2.3 Fixed data field format . 84
5.4.2.4 Variable data field format . 87
5.4.2.5 Synchronization burst request . 87
5.4.2.6 Broadcast link management burst . 87
5.4.3 Control (CTRL) parameter formats . 88
5.4.3.1 Encoding . 88
5.4.3.2 VDL Mode 4 parameter identification . 88
5.4.3.3 Ground-initiated modification parameters . 89
5.4.3.4 Ground-initiated information parameters . 92
5.4.3a LME timers and parameters . 94
5.4.3a.1 General . 94
5.4.3a.2 Counter L1 (maximum number of missed reservations) and Timer TL3 (inter miss timer) . 95
5.4.4 LME procedures . 95
5.4.4.1 Synchronization burst procedures . 95
5.4.4.2 Peer Entity Contact Table (PECT) . 98
5.4.4.3 Network entry protocol specifications . 99
5.4.5 Additional material for ADS-B applications . 105
5.4.5.1 Information field formats . 105
5.4.5.2 ADS-B request format. 106
5.5 Void . 106
5.6 Definitions for Compact Position Reporting . 106
5.6.1 Introduction. 106
ETSI
6 ETSI EN 302 842-2 V1.3.1 (2011-09)
5.6.2 Parameter symbols, data types, constants and variables . 107
5.6.2.1 Parameter symbols . 107
5.6.2.2 Data types . 107
5.6.2.3 Constants . 107
5.6.2.4 Variables . 107
5.6.2.5 Functions . 107
5.6.2.6 Patch constants . 107
5.6.3 Fixed data field position encoding . 107
5.6.4 Fixed data field position local decoding . 107
5.6.5 Fixed data field position global decoding . 107
5.6.6 Position Report Processing . 107
6 General design requirements . 108
6.1 Controls and indicators . 108
6.2 Warm up . 108
6.3 Airworthiness . 108
6.4 Intended function . 108
6.5 International Telecommunications Union regulations . 108
6.6 Fire protection . 108
6.7 Operation of controls . 108
6.8 Accessibility of controls . 108
6.9 Effects of tests . 108
6.10 Failure of the VDL Mode 4 equipment . 108
6.11 Software management . 108
6.12 Transceiver configuration . 108
6.13 Provision for multiple redundant VDL4 transceivers . 109
6.14 Reception capability . 109
6.15 Transmission capability . 109
6.16 Monitoring of proper operation . 109
6.17 Power-up self test . 109
7 Protocol test procedures . 109
7.1 General . 109
7.1.1 Input voltage . 109
7.1.2 Power input frequency . 109
7.1.3 Adjustment of equipment . 109
7.1.4 Equipment configuration . 109
7.1.5 Test equipment precautions . 110
7.1.6 Ambient conditions . 110
7.1.7 Connected loads . 110
7.2 Required test rig . 110
7.3 Protocol test-suite description methodology . 112
7.4 Detailed protocol test procedures . 112
7.4.1 Test-suite overview . 113
7.4.2 Declarations . 119
7.4.3 Constraints . 119
7.4.3.1 Abbreviations . 119
7.4.3.1.1 Subfield mnemonics . 119
7.4.3.1.2 Special characters used in the subfield definitions . 120
7.4.3.1.3 Station addresses and positions . 120
7.4.3.1.4 Tables of values for use in CPR test cases . 121
7.4.3.1.5 Tables of values for use in content checking test cases . 133
7.4.3.1.6 VDL4 burst formats . 135
7.4.3.2 Test cases . 157
7.4.3.2.1 Test case macros . 157
7.4.3.2.2 Test case descriptions . 160
Annex A (informative): Cross reference matrix . 384
Annex B (informative): Description of ISO/IEC 9646 test methodology . 410
B.1 Overview of the structure of the ISO/IEC 9646 test suites . . 410
ETSI
7 ETSI EN 302 842-2 V1.3.1 (2011-09)
B.2 The test case description. 410
B.3 The queue action . 412
B.4 The repeat construct . 412
B.5 Macro definitions . . 413
B.6 Test case naming . 413
Annex C (informative): Bibliography . 414
History . 420

ETSI
8 ETSI EN 302 842-2 V1.3.1 (2011-09)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://ipr.etsi.org).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Aeronautics (AERO).
The present document is part 2 of a multi-part deliverable covering the VHF air-ground and air-air Digital Link (VDL)
Mode 4 radio equipment; Technical characteristics and methods of measurement for aeronautical mobile (airborne)
equipment, as identified below:
Part 1: "Physical layer";
Part 2: "General description and data link layer";
Part 3: "Additional broadcast aspects";
Part 4: "Point-to-point functions".
The present document is accompanied by an equivalent ground-based standard, EN 301 842 [10], [11], [12] and [13],
covering the VHF air-ground Data Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of
measurement for ground-based equipment.
NOTE 1: Minimum Operational Performance Specifications (MOPS) are also being developed for VDL Mode 4.
EUROCAE have previously published Interim MOPS for VDL Mode 4 [i.6] which are a sub set of
EN 302 842-1 [2], 2, 3 [6] and 4 [13]. EN 302 842-1 [2], 2, 3 and 4 complies with the requirements of
CEC Mandate M/318.
NOTE 2: Following the decision taken at the ICAO Aeronautical Communication Panel's WG/M (Bangkok,
February 2011), it remains to be seen if ICAO Annex 10 Vol III will be amended changing the
recommended tuning frequency range from 108-117,975 MHz to 112-117,975 MHz. The present
document will be updated accordingly if the amendment is accepted and made publicly available.

National transposition dates
Date of adoption of this EN: 20 September 2011
Date of latest announcement of this EN (doa): 31 December 2011
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 June 2012
Date of withdrawal of any conflicting National Standard (dow): 30 June 2012

ETSI
9 ETSI EN 302 842-2 V1.3.1 (2011-09)
Introduction
The present document states the technical specifications for Very High Frequency (VHF) Digital Link (VDL) Mode 4
aeronautical mobile (airborne) radio transmitters, transceivers and receivers for air-ground and air-air communications
operating in the VHF band, using Gaussian Filtered Frequency Shift Keying (GFSK) modulation with 25 kHz channel
spacing and capable of tuning to any of the 25 kHz channels from 118,000 MHz to 136,975 MHz as defined in ICAO
VDL SARPs [i.2].
The present document may be used to produce tests for the assessment of the performance of the equipment. The
performance of the equipment submitted for type testing should be representative of the performance of the
corresponding production model.
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 or a documented alternative approved by the certifying
authority;
• equipment comply with EN 302 842-1 [2].
NOTE: The present document has been produced with a view to maintaining consistency of numbering with the
equivalent standard for ground equipment (see EN 301 842 [10], [11], [12] and [13]). Where requirements
are the same, they have been given the same number. Some new airborne requirements have been inserted
between requirements that were sequential in EN 301 842 [10], [11], [12] and [13]. This has led to a non-
standard form of numbering for new requirements in some places.
ETSI
10 ETSI EN 302 842-2 V1.3.1 (2011-09)
1 Sc
...

Final draft ETSI EN 302 842-2 V1.3.1 (2011-07)
European Standard
VHF air-ground and air-air Digital Link (VDL)
Mode 4 radio equipment;
Technical characteristics and methods of measurement
for aeronautical mobile (airborne) equipment;
Part 2: General description and data link layer

2 Final draft ETSI EN 302 842-2 V1.3.1 (2011-07)

Reference
REN/AERO-00007-2
Keywords
aeronautical, digital, radio, testing, VHF
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 - 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 2011.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI 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 302 842-2 V1.3.1 (2011-07)
Contents
Intellectual Property Rights . 8
Foreword . 8
Introduction . 9
1 Scope . 10
2 References . 12
2.1 Normative references . 12
2.2 Informative references . 13
3 Definitions and abbreviations . 13
3.1 Definitions . 13
3.1.1 Basic reference model definitions . 13
3.1.2 Service conventions definitions . 13
3.1.3 General definitio ns . 13
3.1.4 Definition of bit order . 17
3.2 Abbreviations . 17
4 General description of VDL Mode 4 mobile station link layer . 18
4.1 Overview of VDL Mode 4 . 18
4.1.1 Void . 19
4.1.2 Relationship to OSI reference model . 19
4.1.3 VDL Mode 4 services . 21
4.1.4 ADS-B function . 21
4.1.5 Operational scenarios . 22
4.1.6 VDL Mode 4 fundamentals . 22
4.1.7 Possible configuration of airborne equipment . 23
4.1.8 Classes of equipment . 25
4.1.9 Transceiver cross-links . 25
4.1.10 Overall structure of specifications for VDL Mode 4 . 25
4.1.11 Equipment performance verification . 27
5 Minimum performance specification under standard test conditions . 28
5.1 MAC sublayer . 28
5.1.1 Services . 28
5.1.2 MAC sublayer services . 28
5.1.3 MAC sublayer parameters . 28
5.1.3.1 General . 28
5.1.3.2 Parameter M1 (number of slots per superframe) . 29
5.1.3.3 Parameter M2_inc and M2_limit (MAC layer control parameters for network entry) . 29
5.1.3.4 Inspection of m2 filter following transceiver failure . 30
5.1.4 Time synchronization . 30
5.1.4.1 Primary . 30
5.1.4.2 Secondary . 30
5.1.4.3 Alignment to UTC second . 31
5.1.4.4 Data quality level . 31
5.1.5 Slot idle/busy notification . 31
5.1.5.1 Slot idle detection . 31
5.1.5.2 Slot busy detection . 31
5.1.5.3 Slot occupied detection . 31
5.1.5.4 Signal level indication . 31
5.1.6 Transmission processing . 32
5.1.7 Received transmission processing . 32
5.2 VSS sublayer . 32
5.2.1 Services . 33
5.2.1a Multiple access . 33
5.2.1.1 Error detection . 33
5.2.1.2 Channel congestion . 33
ETSI
4 Final draft ETSI EN 302 842-2 V1.3.1 (2011-07)
5.2.2 Burst format . 34
5.2.2.1 VSS burst structure . 34
5.2.2.2 Version number . 35
5.2.2.3 Source address . 35
5.2.2.4 Message ID . 35
5.2.2.5 Information field . 36
5.2.2.6 Reservation fields . 36
5.2.2.7 Autonomous/directed flag . 36
5.2.3 VSS sublayer parameters . 37
5.2.3.1 General . 37
5.2.3.2 Parameter VS1 (number of ground quarantined slots) . 37
5.2.3.3 Parameter VS2 (minimum CCI performance) . 38
5.2.3.4 Parameter VS4 (quarantine slot re-use range) . 38
5.2.3.5 Parameter VS5 (maximum burst length) . 38
5.2.4 VSS quality of service parameters . 39
5.2.4.1 General . 39
5.2.4.2 Parameter Q1 (priority) . 39
5.2.4.3 Parameters Q2a to Q2d (slot selection range constraint for level n) . 40
5.2.4.4 Parameter Q3 (replace queued data) . 40
5.2.4.5 Parameter Q4 (number of available slots) . 41
5.2.5 Received transmission processing . 41
5.2.6 Reserved access protocol specification . 42
5.2.6.1 Reservation table . 42
5.2.6.2 Selecting slots for transmission or reservation . 43
5.2.6.3 Reserved transmissions . 44
5.2.6.4 Reservation conflicts . 45
5.2.6.5 Transmission conflicts for mobile stations . 45
5.2.7 Random access protocol specification . 46
5.2.7.1 General . 46
5.2.7.2 Random access parameters. 46
5.2.7.3 Random access procedures. 48
5.2.8 Void . 49
5.2.9 Null reservation protocol specification . 49
5.2.9.1 Null reservation burst format . 49
5.2.10 Periodic broadcast protocol specification . 49
5.2.10.1 Periodic broadcast reservation burst format . 49
5.2.10.2 Periodic broadcast timers . 50
5.2.10.3 Periodic broadcast parameters . 50
5.2.10.4 Periodic broadcast reception procedures . 51
5.2.10.5 Periodic broadcast transmission procedures . 52
5.2.11 Incremental broadcast protocol specification . 55
5.2.11.1 Incremental broadcast reservation burst format . 55
5.2.11.2 Incremental broadcast parameters . 55
5.2.11.3 Incremental broadcast reception procedures . 56
5.2.11.4 Incremental broadcast transmission procedures . 56
5.2.12 Combined periodic broadcast and incremental broadcast protocol specification . 57
5.2.12.1 Combined periodic broadcast and incremental broadcast reservation burst. 57
5.2.13 Big negative dither (BND) broadcast protocol specifications . 57
5.2.13.1 BND reservation burst format . 57
5.2.13.2 BND broadcast parameters. 58
5.2.13.3 BND broadcast reception procedures . 58
5.2.13.4 BND broadcast transmission procedures . 58
5.2.14 Unicast request protocol specification . 58
5.2.14.1 Unicast request reservation burst format . 58
5.2.14.1a Unicast request parameters. 59
5.2.14.2 Unicast request reception procedures . 60
5.2.14.3 Unicast request transmission procedures . 61
5.2.15 Information transfer request protocol specification . 61
5.2.15.1 Information transfer request reservation burst format . 61
5.2.15.2 Information transfer request reception procedures . 63
5.2.16 Directed request protocol specification. 63
5.2.16.1 Directed request reservation burst format . 63
ETSI
5 Final draft ETSI EN 302 842-2 V1.3.1 (2011-07)
5.2.16.2 Directed request parameters . 66
5.2.16.3 Directed request reception procedures . 67
5.2.16.4 Directed request transmission procedures . 68
5.2.16.5 Directed request response procedures . 69
5.2.17 Block reservation protocols specification . 70
5.2.17.1 Superframe block reservation burst format . 70
5.2.17.2 Second frame block reservation burst format . 71
5.2.17.3 Void. 72
5.2.17.4 Superframe block reservation reception procedures . 72
5.2.17.5 Second frame block reservation parameters . 74
5.2.17.6 Second frame block reservation reception procedures . 74
5.2.17.7 Void. 74
5.2.17.7a Procedures for responding to a rebroadcast request for superframe block reservation . 74
5.2.18 Response protocol specification . 75
5.2.18.1 Response burst format . 75
5.2.19 General request protocol specification . 75
5.2.19.1 General request burst format . 75
5.2.19.2 General request procedures . 76
5.2.20 General response protocol specification . 76
5.2.20.1 General response burst format. 76
5.2.20.2 General response procedures . 78
5.2.21 Retransmission procedures . 78
5.3 DLS sublayer . 79
5.3.1 Services . 79
5.3.1.1 General . 79
5.3.1.2 Data transfer . 79
5.3.1.3 Station address encoding . 79
5.3.1.4 DLS burst formats . 81
5.3.2 DLS system parameters . 82
5.3.2.1 Parameter ND4 (maximum length of a UDATA burst) . 82
5.3.3 DLS procedures . 82
5.3.3.1 Broadcast . 82
5.3.3.2 DLS not supported . 82
5.3.3.3 User data packet reception . 83
5.3.3.4 CTRL DLPDU . 83
5.4 Link Management Entity (LME) sublayer . 83
5.4.1 Services . 83
5.4.2 Synchronization burst format . 83
5.4.2.1 General . 83
5.4.2.2 Fixed and variable data fields. 83
5.4.2.3 Fixed data field format . 84
5.4.2.4 Variable data field format . 87
5.4.2.5 Synchronization burst request . 87
5.4.2.6 Broadcast link management burst . 87
5.4.3 Control (CTRL) parameter formats . 88
5.4.3.1 Encoding . 88
5.4.3.2 VDL Mode 4 parameter identification . 88
5.4.3.3 Ground-initiated modification parameters . 89
5.4.3.4 Ground-initiated information parameters . 92
5.4.3a LME timers and parameters . 94
5.4.3a.1 General . 94
5.4.3a.2 Counter L1 (maximum number of missed reservations) and Timer TL3 (inter miss timer) . 95
5.4.4 LME procedures . 95
5.4.4.1 Synchronization burst procedures . 95
5.4.4.2 Peer Entity Contact Table (PECT) . 98
5.4.4.3 Network entry protocol specifications . 99
5.4.5 Additional material for ADS-B applications . 105
5.4.5.1 Information field formats . 105
5.4.5.2 ADS-B request format. 106
5.5 Void . 106
5.6 Definitions for Compact Position Reporting . 106
5.6.1 Introduction. 106
ETSI
6 Final draft ETSI EN 302 842-2 V1.3.1 (2011-07)
5.6.2 Parameter symbols, data types, constants and variables . 107
5.6.2.1 Parameter symbols . 107
5.6.2.2 Data types . 107
5.6.2.3 Constants . 107
5.6.2.4 Variables . 107
5.6.2.5 Functions . 107
5.6.2.6 Patch constants . 107
5.6.3 Fixed data field position encoding . 107
5.6.4 Fixed data field position local decoding . 107
5.6.5 Fixed data field position global decoding . 107
5.6.6 Position Report Processing . 107
6 General design requirements . 108
6.1 Controls and indicators . 108
6.2 Warm up . 108
6.3 Airworthiness . 108
6.4 Intended function . 108
6.5 International Telecommunications Union regulations . 108
6.6 Fire protection . 108
6.7 Operation of controls . 108
6.8 Accessibility of controls . 108
6.9 Effects of tests . 108
6.10 Failure of the VDL Mode 4 equipment . 108
6.11 Software management . 108
6.12 Transceiver configuration . 108
6.13 Provision for multiple redundant VDL4 transceivers . 109
6.14 Reception capability . 109
6.15 Transmission capability . 109
6.16 Monitoring of proper operation . 109
6.17 Power-up self test . 109
7 Protocol test procedures . 109
7.1 General . 109
7.1.1 Input voltage . 109
7.1.2 Power input frequency . 109
7.1.3 Adjustment of equipment . 109
7.1.4 Equipment configuration . 109
7.1.5 Test equipment precautions . 110
7.1.6 Ambient conditions . 110
7.1.7 Connected loads . 110
7.2 Required test rig . 110
7.3 Protocol test-suite description methodology . 112
7.4 Detailed protocol test procedures . 112
7.4.1 Test-suite overview . 113
7.4.2 Declarations . 119
7.4.3 Constraints . 119
7.4.3.1 Abbreviations . 119
7.4.3.1.1 Subfield mnemonics . 119
7.4.3.1.2 Special characters used in the subfield definitions . 120
7.4.3.1.3 Station addresses and positions . 120
7.4.3.1.4 Tables of values for use in CPR test cases . 121
7.4.3.1.5 Tables of values for use in content checking test cases . 133
7.4.3.1.6 VDL4 burst formats . 135
7.4.3.2 Test cases . 157
7.4.3.2.1 Test case macros . 157
7.4.3.2.2 Test case descriptions . 160
Annex A (informative): Cross reference matrix . 384
Annex B (informative): Description of ISO/IEC 9646 test methodology. 410
B.1 Overview of the structure of the ISO/IEC 9646 test suites . . 410
ETSI
7 Final draft ETSI EN 302 842-2 V1.3.1 (2011-07)
B.2 The test case description. 410
B.3 The queue action . 412
B.4 The repeat construct . 412
B.5 Macro definitions . . 413
B.6 Test case naming . 413
Annex C (informative): Bibliography . 414
History . 420

ETSI
8 Final draft ETSI EN 302 842-2 V1.3.1 (2011-07)
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://ipr.etsi.org).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This final draft European Standard (EN) has been produced by ETSI Technical Committee Aeronautics (AERO), and is
now submitted for the Vote phase of the ETSI standards Two-step Approval Procedure.
The present document is part 2 of a multi-part deliverable covering the VHF air-ground and air-air Digital Link (VDL)
Mode 4 radio equipment; Technical characteristics and methods of measurement for aeronautical mobile (airborne)
equipment, as identified below:
Part 1: "Physical layer";
Part 2: "General description and data link layer";
Part 3: "Additional broadcast aspects";
Part 4: "Point-to-point functions".
The present document is accompanied by an equivalent ground-based standard, EN 301 842 [10], [11], [12] and [13],
covering the VHF air-ground Data Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of
measurement for ground-based equipment.
NOTE 1: Minimum Operational Performance Specifications (MOPS) are also being developed for VDL Mode 4.
EUROCAE have previously published Interim MOPS for VDL Mode 4 [i.6] which are a sub set of
EN 302 842-1 [2], 2, 3 [6] and 4 [13]. EN 302 842-1 [2], 2, 3 and 4 complies with the requirements of
CEC Mandate M/318.
NOTE 2: Following the decision taken at the ICAO Aeronautical Communication Panel (Bangkok, February 2011),
it is expected that ICAO Annex 10 will be amended in 2012 changing the frequency range from
108-137.975 MHz to 112-137.975 MHz. The present deliverable will be updated accordingly once the
amendment is publicly available.

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

ETSI
9 Final draft ETSI EN 302 842-2 V1.3.1 (2011-07)
Introduction
The present document states the technical specifications for Very High Frequency (VHF) Digital Link (VDL) Mode 4
aeronautical mobile (airborne) radio transmitters, transceivers and receivers for air-ground and air-air communications
operating in the VHF band, using Gaussian Filtered Frequency Shift Keying (GFSK) modulation with 25 kHz channel
spacing and capable of tuning to any of the 25 kHz channels from 118,000 MHz to 136,975 MHz as defined in ICAO
VDL SARPs [i.2].
The present document may be used to produce tests for the assessment of the performance of the equipment. The
performance of the equipment submitted for type testing should be representative of the performance of the
corresponding production model.
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 or a documented alternative approved by the certifying
authority;
• equipment comply with EN 302 842-1 [2].
NOTE: The present document has been produced with a view to maintaining consistency of numbering with the
equivalent standard for ground equipment (see EN 301 842 [10], [11], [12] and [13]). Where requirements
are the same, they have been given the same number. Some new airborne requirements have been inserted
between requirements that were sequential in EN 301 842 [10], [11], [12] and [13]. This has led to a non-
sta
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.VHF air-ground and air-air Digital Link (VDL) Mode 4 radio equipment - Technical characteristics and methods of measurement for aeronautical mobile (airborne) equipment - Part 2: General description and data link layer49.090On-board equipment and instruments35.100.20Podatkovni povezovalni slojData link layer33.060.99Druga oprema za radijske komunikacijeOther equipment for radiocommunicationsICS:Ta slovenski standard je istoveten z:EN 302 842-2 Version 1.3.1SIST EN 302 842-2 V1.3.1:2011en01-november-2011SIST EN 302 842-2 V1.3.1:2011SLOVENSKI
STANDARD
European Standard SIST EN 302 842-2 V1.3.1:2011

ETSI ETSI EN 302 842-2 V1.3.1 (2011-09) 2
Reference REN/AERO-00007-2 Keywords aeronautical, digital, radio, testing, VHF ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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© European Telecommunications Standards Institute 2011. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE™ are Trade Marks of ETSI 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 302 842-2 V1.3.1:2011

ETSI ETSI EN 302 842-2 V1.3.1 (2011-09) 3 Contents Intellectual Property Rights . 8 Foreword . 8 Introduction . 9 1 Scope . 10 2 References . 12 2.1 Normative references . 12 2.2 Informative references . 13 3 Definitions and abbreviations . 13 3.1 Definitions . 13 3.1.1 Basic reference model definitions . 13 3.1.2 Service conventions definitions . 13 3.1.3 General definitions . 14 3.1.4 Definition of bit order . 17 3.2 Abbreviations . 17 4 General description of VDL Mode 4 mobile station link layer . 19 4.1 Overview of VDL Mode 4 . 19 4.1.1 Void . 19 4.1.2 Relationship to OSI reference model . 19 4.1.3 VDL Mode 4 services . 21 4.1.4 ADS-B function . 21 4.1.5 Operational scenarios . 22 4.1.6 VDL Mode 4 fundamentals . 22 4.1.7 Possible configuration of airborne equipment . 23 4.1.8 Classes of equipment . 25 4.1.9 Transceiver cross-links . 25 4.1.10 Overall structure of specifications for VDL Mode 4 . 25 4.1.11 Equipment performance verification . 27 5 Minimum performance specification under standard test conditions . 28 5.1 MAC sublayer . 28 5.1.1 Services . 28 5.1.2 MAC sublayer services . 28 5.1.3 MAC sublayer parameters . 28 5.1.3.1 General . 28 5.1.3.2 Parameter M1 (number of slots per superframe) . 29 5.1.3.3 Parameter M2_inc and M2_limit (MAC layer control parameters for network entry) . 29 5.1.3.4 Inspection of m2 filter following transceiver failure . 30 5.1.4 Time synchronization . 30 5.1.4.1 Primary . 30 5.1.4.2 Secondary . 30 5.1.4.3 Alignment to UTC second . 31 5.1.4.4 Data quality level . 31 5.1.5 Slot idle/busy notification . 31 5.1.5.1 Slot idle detection . 31 5.1.5.2 Slot busy detection . 31 5.1.5.3 Slot occupied detection . 31 5.1.5.4 Signal level indication . 31 5.1.6 Transmission processing . 32 5.1.7 Received transmission processing . 32 5.2 VSS sublayer . 32 5.2.1 Services . 33 5.2.1a Multiple access . 33 5.2.1.1 Error detection . 33 5.2.1.2 Channel congestion . 33 SIST EN 302 842-2 V1.3.1:2011

ETSI ETSI EN 302 842-2 V1.3.1 (2011-09) 4 5.2.2 Burst format . 34 5.2.2.1 VSS burst structure . 34 5.2.2.2 Version number . 35 5.2.2.3 Source address . 35 5.2.2.4 Message ID . 35 5.2.2.5 Information field . 36 5.2.2.6 Reservation fields . 36 5.2.2.7 Autonomous/directed flag . 36 5.2.3 VSS sublayer parameters . 37 5.2.3.1 General . 37 5.2.3.2 Parameter VS1 (number of ground quarantined slots) . 37 5.2.3.3 Parameter VS2 (minimum CCI performance) . 38 5.2.3.4 Parameter VS4 (quarantine slot re-use range) . 38 5.2.3.5 Parameter VS5 (maximum burst length) . 38 5.2.4 VSS quality of service parameters . 39 5.2.4.1 General . 39 5.2.4.2 Parameter Q1 (priority) . 39 5.2.4.3 Parameters Q2a to Q2d (slot selection range constraint for level n) . 40 5.2.4.4 Parameter Q3 (replace queued data) . 40 5.2.4.5 Parameter Q4 (number of available slots) . 41 5.2.5 Received transmission processing . 41 5.2.6 Reserved access protocol specification . 42 5.2.6.1 Reservation table . 42 5.2.6.2 Selecting slots for transmission or reservation . 43 5.2.6.3 Reserved transmissions . 44 5.2.6.4 Reservation conflicts . 45 5.2.6.5 Transmission conflicts for mobile stations . 45 5.2.7 Random access protocol specification . 46 5.2.7.1 General . 46 5.2.7.2 Random access parameters. 46 5.2.7.3 Random access procedures. 48 5.2.8 Void . 49 5.2.9 Null reservation protocol specification . 49 5.2.9.1 Null reservation burst format . 49 5.2.10 Periodic broadcast protocol specification . 49 5.2.10.1 Periodic broadcast reservation burst format . 49 5.2.10.2 Periodic broadcast timers . 50 5.2.10.3 Periodic broadcast parameters . 50 5.2.10.4 Periodic broadcast reception procedures . 51 5.2.10.5 Periodic broadcast transmission procedures . 52 5.2.11 Incremental broadcast protocol specification . 55 5.2.11.1 Incremental broadcast reservation burst format . 55 5.2.11.2 Incremental broadcast parameters . 55 5.2.11.3 Incremental broadcast reception procedures . 56 5.2.11.4 Incremental broadcast transmission procedures . 56 5.2.12 Combined periodic broadcast and incremental broadcast protocol specification . 57 5.2.12.1 Combined periodic broadcast and incremental broadcast reservation burst. 57 5.2.13 Big negative dither (BND) broadcast protocol specifications . 57 5.2.13.1 BND reservation burst format . 57 5.2.13.2 BND broadcast parameters. 58 5.2.13.3 BND broadcast reception procedures . 58 5.2.13.4 BND broadcast transmission procedures . 58 5.2.14 Unicast request protocol specification . 58 5.2.14.1 Unicast request reservation burst format . 58 5.2.14.1a Unicast request parameters. 59 5.2.14.2 Unicast request reception procedures . 60 5.2.14.3 Unicast request transmission procedures . 61 5.2.15 Information transfer request protocol specification . 61 5.2.15.1 Information transfer request reservation burst format . 61 5.2.15.2 Information transfer request reception procedures . 63 5.2.16 Directed request protocol specification. 63 5.2.16.1 Directed request reservation burst format . 63 SIST EN 302 842-2 V1.3.1:2011

ETSI ETSI EN 302 842-2 V1.3.1 (2011-09) 5 5.2.16.2 Directed request parameters . 66 5.2.16.3 Directed request reception procedures . 67 5.2.16.4 Directed request transmission procedures . 68 5.2.16.5 Directed request response procedures . 69 5.2.17 Block reservation protocols specification . 70 5.2.17.1 Superframe block reservation burst format . 70 5.2.17.2 Second frame block reservation burst format . 71 5.2.17.3 Void. 72 5.2.17.4 Superframe block reservation reception procedures . 72 5.2.17.5 Second frame block reservation parameters . 74 5.2.17.6 Second frame block reservation reception procedures . 74 5.2.17.7 Void. 74 5.2.17.7a Procedures for responding to a rebroadcast request for superframe block reservation . 74 5.2.18 Response protocol specification . 75 5.2.18.1 Response burst format . 75 5.2.19 General request protocol specification . 75 5.2.19.1 General request burst format . 75 5.2.19.2 General request procedures . 76 5.2.20 General response protocol specification . 76 5.2.20.1 General response burst format. 76 5.2.20.2 General response procedures . 78 5.2.21 Retransmission procedures . 78 5.3 DLS sublayer . 79 5.3.1 Services . 79 5.3.1.1 General . 79 5.3.1.2 Data transfer . 79 5.3.1.3 Station address encoding . 79 5.3.1.4 DLS burst formats . 81 5.3.2 DLS system parameters . 82 5.3.2.1 Parameter ND4 (maximum length of a UDATA burst) . 82 5.3.3 DLS procedures . 82 5.3.3.1 Broadcast . 82 5.3.3.2 DLS not supported . 82 5.3.3.3 User data packet reception . 83 5.3.3.4 CTRL DLPDU . 83 5.4 Link Management Entity (LME) sublayer . 83 5.4.1 Services . 83 5.4.2 Synchronization burst format . 83 5.4.2.1 General . 83 5.4.2.2 Fixed and variable data fields. 83 5.4.2.3 Fixed data field format . 84 5.4.2.4 Variable data field format . 87 5.4.2.5 Synchronization burst request . 87 5.4.2.6 Broadcast link management burst . 87 5.4.3 Control (CTRL) parameter formats . 88 5.4.3.1 Encoding . 88 5.4.3.2 VDL Mode 4 parameter identification . 88 5.4.3.3 Ground-initiated modification parameters . 89 5.4.3.4 Ground-initiated information parameters . 92 5.4.3a LME timers and parameters . 94 5.4.3a.1 General . 94 5.4.3a.2 Counter L1 (maximum number of missed reservations) and Timer TL3 (inter miss timer) . 95 5.4.4 LME procedures . 95 5.4.4.1 Synchronization burst procedures . 95 5.4.4.2 Peer Entity Contact Table (PECT) . 98 5.4.4.3 Network entry protocol specifications . 99 5.4.5 Additional material for ADS-B applications . 105 5.4.5.1 Information field formats . 105 5.4.5.2 ADS-B request format. 106 5.5 Void . 106 5.6 Definitions for Compact Position Reporting . 106 5.6.1 Introduction. 106 SIST EN 302 842-2 V1.3.1:2011

ETSI ETSI EN 302 842-2 V1.3.1 (2011-09) 6 5.6.2 Parameter symbols, data types, constants and variables . 107 5.6.2.1 Parameter symbols . 107 5.6.2.2 Data types . 107 5.6.2.3 Constants . 107 5.6.2.4 Variables . 107 5.6.2.5 Functions . 107 5.6.2.6 Patch constants . 107 5.6.3 Fixed data field position encoding . 107 5.6.4 Fixed data field position local decoding . 107 5.6.5 Fixed data field position global decoding . 107 5.6.6 Position Report Processing . 107 6 General design requirements . 108 6.1 Controls and indicators . 108 6.2 Warm up . 108 6.3 Airworthiness . 108 6.4 Intended function . 108 6.5 International Telecommunications Union regulations . 108 6.6 Fire protection . 108 6.7 Operation of controls . 108 6.8 Accessibility of controls . 108 6.9 Effects of tests . 108 6.10 Failure of the VDL Mode 4 equipment . 108 6.11 Software management . 108 6.12 Transceiver configuration . 108 6.13 Provision for multiple redundant VDL4 transceivers . 109 6.14 Reception capability . 109 6.15 Transmission capability . 109 6.16 Monitoring of proper operation . 109 6.17 Power-up self test . 109 7 Protocol test procedures . 109 7.1 General . 109 7.1.1 Input voltage . 109 7.1.2 Power input frequency . 109 7.1.3 Adjustment of equipment . 109 7.1.4 Equipment configuration . 109 7.1.5 Test equipment precautions . 110 7.1.6 Ambient conditions . 110 7.1.7 Connected loads . 110 7.2 Required test rig . 110 7.3 Protocol test-suite description methodology . 112 7.4 Detailed protocol test procedures . 112 7.4.1 Test-suite overview . 113 7.4.2 Declarations . 119 7.4.3 Constraints . 119 7.4.3.1 Abbreviations . 119 7.4.3.1.1 Subfield mnemonics . 119 7.4.3.1.2 Special characters used in the subfield definitions . 120 7.4.3.1.3 Station addresses and positions . 120 7.4.3.1.4 Tables of values for use in CPR test cases . 121 7.4.3.1.5 Tables of values for use in content checking test cases . 133 7.4.3.1.6 VDL4 burst formats . 135 7.4.3.2 Test cases . 157 7.4.3.2.1 Test case macros . 157 7.4.3.2.2 Test case descriptions . 160 Annex A (informative): Cross reference matrix . 384 Annex B (informative): Description of ISO/IEC 9646 test methodology . 410 B.1 Overview of the structure of the ISO/IEC 9646 test suites . 410 SIST EN 302 842-2 V1.3.1:2011

ETSI ETSI EN 302 842-2 V1.3.1 (2011-09) 7 B.2 The test case description. 410 B.3 The queue action . 412 B.4 The repeat construct . 412 B.5 Macro definitions . 413 B.6 Test case naming . 413 Annex C (informative): Bibliography . 414 History . 420
ETSI ETSI EN 302 842-2 V1.3.1 (2011-09) 8 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://ipr.etsi.org). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (EN) has been produced by ETSI Technical Committee Aeronautics (AERO). The present document is part 2 of a multi-part deliverable covering the VHF air-ground and air-air Digital Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of measurement for aeronautical mobile (airborne) equipment, as identified below: Part 1: "Physical layer"; Part 2: "General description and data link layer"; Part 3: "Additional broadcast aspects"; Part 4: "Point-to-point functions". The present document is accompanied by an equivalent ground-based standard, EN 301 842 [10], [11], [12] and [13], covering the VHF air-ground Data Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of measurement for ground-based equipment. NOTE 1: Minimum Operational Performance Specifications (MOPS) are also being developed for VDL Mode 4. EUROCAE have previously published Interim MOPS for VDL Mode 4 [i.6] which are a sub set of
EN 302 842-1 [2], 2, 3 [6] and 4 [13]. EN 302 842-1 [2], 2, 3 and 4 complies with the requirements of
CEC Mandate M/318. NOTE 2: Following the decision taken at the ICAO Aeronautical Communication Panel's WG/M (Bangkok, February 2011), it remains to be seen if ICAO Annex 10 Vol III will be amended changing the recommended tuning frequency range from 108-117,975 MHz to 112-117,975 MHz. The present document will be updated accordingly if the amendment is accepted and made publicly available.
National transposition dates Date of adoption of this EN: 20 September 2011 Date of latest announcement of this EN (doa): 31 December 2011 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
30 June 2012 Date of withdrawal of any conflicting National Standard (dow): 30 June 2012
ETSI ETSI EN 302 842-2 V1.3.1 (2011-09) 9 Introduction The present document states the technical specifications for Very High Frequency (VHF) Digital Link (VDL) Mode 4 aeronautical mobile (airborne) radio transmitters, transceivers and receivers for air-ground and air-air communications operating in the VHF band, using Gaussian Filtered Frequency Shift Keying (GFSK) modulation with 25 kHz channel spacing and capable of tuning to any of the 25 kHz channels from 118,000 MHz to 136,975 MHz as defined in ICAO VDL SARPs [i.2]. The present document may be used to produce tests for the assessment of the performance of the equipment. The performance of the equipment submitted for type testing should be representative of the performance of the corresponding production model. 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 or a documented alternative approved by the certifying authority; • equipment comply with EN 302 842-1 [2]. NOTE: The present document has been produced with a view to maintaining consistency of numbering with the equivalent standard for ground equipment (see EN 301 842 [10], [11], [12] and [13]). Where requirements are the same, they have been given the same number. Some new airborne requirements have been inserted between requirements that were sequential in EN 301 842 [10], [11], [12] and [13]. This has led to a non-standard form of numbering for new requirements in some place
...