ETSI EN 301 447 V2.1.12 (2026-08)

• Abstract:

  REN/SES-00433

• Status: Not Published
• Technical Committee: SES HARM - SES WG on R&TTE dir. 99/5/EC and and RED dir. 2014/53/EU
• Current Stage: 9 - TB approval
• Due Date: 19-Nov-2026

Draft ETSI EN 301 447 V2.1.12 (2026-08)

HARMONISED EUROPEAN STANDARD
Satellite Earth Stations and Systems (SES);
Satellite Earth Stations on board
Vessels (ESVs) operating in the 4/6 GHz frequency bands
allocated to the Fixed Satellite Service (FSS);
Harmonised Standard for access to radio spectrum

2 Draft ETSI EN 301 447 V2.1.12 (2026-08)

Reference
REN/SES-00433
Keywords
ESV, GSO, maritime, regulation, satellite

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ETSI
3 Draft ETSI EN 301 447 V2.1.12 (2026-08)
Contents
Intellectual Property Rights . 7
Foreword . 7
Modal verbs terminology . 8
Introduction . 8
1 Scope . 9
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 10
3 Definition of terms, symbols and abbreviations . 11
3.1 Terms . 11
3.2 Symbols . 13
3.3 Abbreviations . 13
4 Technical requirements specifications . 14
4.1 General . 14
4.1.1 Environmental profile . 14
4.1.2 Control and Monitoring Functions (CMF) . 15
4.1.3 Operational configurations . 15
4.1.4 ESV states and radio states . 15
4.2 Conformance requirements . 16
4.2.1 On-axis emissions . 16
4.2.1.1 Justification . 16
4.2.1.2 Specification. 16
4.2.1.3 Conformance tests . 16
4.2.2 Transmit antenna on-axis gain and off-axis gain patterns . 16
4.2.2.1 Justification . 16
4.2.2.2 Specification. 17
4.2.2.3 Conformance tests . 17
4.2.3 Off-axis spurious radiation . 17
4.2.3.1 Justification . 17
4.2.3.2 Specification. 17
4.2.3.3 Conformance tests . 18
4.2.4 On-axis spurious radiation for ESV . 18
4.2.4.1 Justification . 18
4.2.4.2 Specification. 18
4.2.4.2.1 "Carrier-on" radio state . 18
4.2.4.2.2 "Carrier-off" and "Emissions disabled" radio states . 19
4.2.4.3 Conformance tests . 19
4.2.5 Maximum ESV emissions towards the horizon . 19
4.2.5.1 Justification . 19
4.2.5.2 Specification. 19
4.2.5.2.1 Specification 1: Maximum e.i.r.p. spectral density towards the horizon . 19
4.2.5.2.2 Specification 2: Maximum e.i.r.p. towards the horizon . 19
4.2.5.3 Conformance tests . 19
4.2.6 Off-axis e.i.r.p. emission density . 20
4.2.6.0 General . 20
4.2.6.1 Justification . 20
4.2.6.2 Specification. 20
4.2.6.3 Conformance tests . 21
4.2.7 Carrier suppression . 21
4.2.7.1 Justification . 21
4.2.7.2 Specification. 21
4.2.7.3 Conformance tests . 22
4.2.8 Antenna Pointing and Polarization Alignment for ESVs . 22
4.2.8.1 Justification . 22
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4 Draft ETSI EN 301 447 V2.1.12 (2026-08)
4.2.8.2 Specification. 22
4.2.8.3 Conformance tests . 23
4.2.9 Cessation of emissions of the ESV . 23
4.2.9.1 Justification . 23
4.2.9.2 Specification. 23
4.2.9.2.1 Specification 1: Mode of cessation of emissions . 23
4.2.9.2.2 Specification 2: Conditions under which the ESV shall cease emissions . 24
4.2.9.2.3 Specification 3: Cessation of emissions . 24
4.2.9.2.4 Specification 4: Fault conditions . 24
4.2.9.3 Conformance tests . 25
4.2.10 Identification of ESV . 25
4.2.10.1 Justification . 25
4.2.10.2 Specification. 25
4.2.10.3 Conformance tests . 25
4.2.11 Control and Monitoring Functions (CMFs) . 25
4.2.11.1 CMF State Diagram . 25
4.2.11.2 Processor monitoring . 26
4.2.11.2.1 Justification . 26
4.2.11.2.2 Specification . 26
4.2.11.2.3 Conformance tests . 27
4.2.11.3 Transmit subsystem monitoring . 27
4.2.11.3.1 Justification . 27
4.2.11.3.2 Specification . 27
4.2.11.3.3 Conformance tests . 27
4.2.11.4 Power-on/Reset . 27
4.2.11.4.1 Justification . 27
4.2.11.4.2 Specification . 27
4.2.11.4.3 Conformance tests . 27
4.2.11.5 Control Channel (CC) and Response Channel (RC) . 27
4.2.11.5.1 Justification . 27
4.2.11.5.2 Specification . 28
4.2.11.5.3 Conformance tests . 28
4.2.11.6 Network control commands . 28
4.2.11.6.1 Justification . 28
4.2.11.6.2 Specification . 29
4.2.11.6.3 Conformance test . 29
4.2.11.7 Initial burst transmission . 29
4.2.11.7.1 Justification . 29
4.2.11.7.2 Specification . 29
4.2.11.7.3 Conformance tests . 29
4.2.12 Receive antenna off-axis gain pattern . 30
4.2.12.1 Justification . 30
4.2.12.2 Specification. 30
4.2.12.3 Conformance tests . 30
4.2.13 Blocking performance . 30
4.2.13.1 Justification . 30
4.2.13.2 Specification. 30
4.2.13.3 Conformance tests . 31
4.2.14 Adjacent Signal Selectivity . 31
4.2.14.1 Justification . 31
4.2.14.2 Specification. 31
4.2.14.3 Conformance tests . 31
5 Testing for compliance with technical requirements . 31
5.1 Environmental conditions for testing . 31
6 Test methods for the complete ESV . 32
6.1 General . 32
6.2 On-axis emissions. 32
6.2.1 Test method . 32
6.2.1.1 Void. 32
6.2.1.2 Method of measurement . 32
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5 Draft ETSI EN 301 447 V2.1.12 (2026-08)
6.2.1.2.1 General . 32
6.2.1.2.2 Method of measurement at the antenna flange . 32
6.2.1.2.3 Method of measurement with a test antenna . 33
6.3 Transmit antenna on-axis gain and off-axis gain patterns . 33
6.3.1 Method of measurement . 33
6.4 Off-axis spurious radiation . 34
6.4.0 Introduction. 34
6.4.1 Test method . 34
6.4.1.0 General . 34
6.4.1.1 Void. 34
6.4.1.2 Above 2 000 MHz . 34
6.4.1.2.0 General . 34
6.4.1.2.1 Identification of the frequencies of spurious radiation . 35
6.4.1.2.2 Measurement of radiated power levels of identified spurious radiation . 35
6.4.1.2.3 Measurement of conducted spurious radiation at the antenna flange . 37
6.5 On-axis spurious radiation . 37
6.5.1 Test method . 37
6.5.1.1 Void. 37
6.5.1.2 Method of measurement . 37
6.5.1.2.1 General . 37
6.5.1.2.2 Method of measurement at the antenna flange . 38
6.5.1.2.3 Method of measurement with a test antenna . 38
6.6 Maximum ESV emissions towards the horizon. 39
6.6.1 Maximum e.i.r.p. towards the horizon . 39
6.6.2 Maximum e.i.r.p. spectral density towards the horizon . 40
6.7 Off-axis e.i.r.p. emission density . 40
6.7.0 General . 40
6.7.1 Test method . 40
6.7.1.1 General . 40
6.7.1.2 Transmit output power density . 41
6.7.1.2.1 General . 41
6.7.1.2.2 Test site. 41
6.7.1.2.3 Method of measurement . 41
6.7.1.3 Antenna transmit gain . 42
6.7.1.3.1 General . 42
6.7.1.3.2 Test site. 42
6.7.1.3.3 Method of measurement . 42
6.7.1.4 Antenna transmit radiation patterns . 43
6.7.1.4.1 General . 43
6.7.1.4.2 Test site. 43
6.7.1.4.3 Test arrangement . 44
6.7.1.4.4 Co-polar radiation pattern-azimuth . 44
6.7.1.4.5 Co-polar radiation pattern-elevation . 44
6.7.1.4.6 Cross-polar radiation pattern-azimuth . 45
6.7.1.4.7 Cross-polar radiation pattern-elevation . 46
6.7.2 Computation of results . 47
6.8 Carrier suppression . 47
6.8.1 Test method . 47
6.9 Antenna pointing for ESV . 47
6.9.1 General . 47
6.9.2 Test method . 48
6.10 Antenna mechanical stability . 49
6.10.1 Test method . 49
6.11 Polarization angle alignment capability . 49
6.11.1 Test method . 49
6.12 Cessation of emissions of the ESV . 49
6.12.1 Test arrangement . 49
6.12.2 Test method . 50
6.12.2.1 General . 50
6.12.2.2 Cessation of emissions from the "Transmission enabled" state . 50
6.12.2.3 Cessation of emission from the "Transmission disabled" state . 51
6.12.2.4 Cessation of emission from the "Initial Phase" state . 51
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6 Draft ETSI EN 301 447 V2.1.12 (2026-08)
6.12.2.4.1 EUTs transmitting initial bursts . 51
6.12.2.4.2 EUTs not transmitting initial bursts . 51
6.12.2.5 "Single action" means of cessation of emissions. 52
6.12.2.6 Fault conditions . 52
6.13 Identification of ESV . 53
6.13.1 Test set up . 53
6.13.2 Test method . 53
6.14 Control and Monitoring Functions . 53
6.14.0 General . 53
6.14.1 Test set up . 53
6.14.2 Processor monitoring - Test method . 53
6.14.3 Transmit subsystem monitoring - Test method . 54
6.14.4 Power-on/Reset - Test method . 54
6.14.5 Control Channel and Response Channel - Test method . 54
6.14.6 Network Control commands-Test method . 55
6.14.7 Initial burst transmission-Test method . 57
6.15 Receive antenna off-axis gain pattern . 57
6.15.1 Test Method . 57
6.15.1.1 Test site . 57
6.15.1.2 Method of measurement . 57
6.16 Blocking performance . 58
6.16.1 Test method . 58
6.17 Adjacent Signal Selectivity . 58
6.17.1 Test method . 58
Annex A (informative): Relationship between the present document and the essential
requirements of Directive 2014/53/EU . 60
Annex B (normative): Mechanical stability methodology . 64
Annex C (informative): Maximum measurement uncertainty . 66
Annex D (informative): Bibliography . 67
Annex E (informative): Change history . 68
History . 69

ETSI
7 Draft ETSI EN 301 447 V2.1.12 (2026-08)
Intellectual Property Rights
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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
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Foreword
This draft Harmonised European Standard (EN) has been produced by ETSI Technical Committee Satellite Earth
Stations and Systems (SES), and is now submitted for the combined Public Enquiry and Vote phase of the ETSI
Standardisation Request deliverable Approval Procedure (SRdAP).
The present document has been prepared under the Commission's standardisation request C(2015) 5376 final [i.7] to
provide one voluntary means of conforming to the essential requirements of Directive 2014/53/EU on the harmonisation
of the laws of the Member States relating to the making available on the market of radio equipment and repealing
Directive 1999/5/EC [i.8].
Once the present document is cited in the Official Journal of the European Union under that Directive, compliance with
the normative clauses of the present document given in Table A.1 confers, within the limits of the scope of the present
document, a presumption of conformity with the corresponding essential requirements of that Directive and associated
EFTA regulations.
Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 18 months after doa

ETSI
8 Draft ETSI EN 301 447 V2.1.12 (2026-08)
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The determination of the parameters of the user earth stations using a given geo-stationary satellite for the protection of
the spectrum allocated to that satellite, is considered to be under the responsibility of the satellite operator or the
satellite network operators.
The present document is based on the application of ITU RR Resolution 902 (Rev WRC-23) [i.1]. The present
document incorporates the technical limitations listed in annex 2 of ITU RR Resolution 902 (Rev. WRC-23) [i.1], ECC
Report (05)69 [i.2], and ECC Report (06)91 [i.3].
NOTE: According to ITU RR Resolution 902 [i.1], any transmission from ESVs within the 300 km minimum
distance of each country where the ESV transmit frequency band is used by the Fixed Service will be
subject to the prior agreement of the concerned administration(s), which may specify additional
operational requirements, or to ECC Decision. ECC/DEC/(05)09 [i.9]
The present document does not cover those cases where a potential source of interference which is producing
individually repeated transient phenomena or a continuous phenomenon is present, e.g. a radar or broadcast site in the
near vicinity. In such a case special protection applied to the source of interference, and the interfered part may be
required.
The present document does not contain any requirement, recommendation or information about the installation of the
ESV.
All parts of the below-deck unit related to reception, processing and presentation of the received information except the
control channel are not within the scope of the present document. The syntax of the control channel messages is outside
the scope of the present document.
The present document is based upon the standard for environmental conditions for marine navigational equipment, IEC
EN 60945 [4]. In addition, attention should be paid to clause 11.1 (Acoustic noise and signals), and clause 11.2
(Compass safe distance) of IEC EN 60945 [4].
ETSI
9 Draft ETSI EN 301 447 V2.1.12 (2026-08)
1 Scope
The present document specifies technical characteristics and methods of measurements for Earth Stations located on
board Vessels (ESVs) which have the following characteristics:
• The ESV is comprised of all the equipment, electrical and mechanical, from the antenna itself to the interface
with other communications equipment on board (usually referred to as the terrestrial interface).
• The ESV transmits in the frequency range from 5 925 MHz to 6 425 MHz allocated to the Fixed Satellite
Services (FSS) (Earth-to-space).
• The ESV receives one or more frequencies within the range from 3 700 MHz to 4 200 MHz allocated to the
Fixed Satellite Services (FSS) (space-to-Earth).
• The ESV transmits a single carrier.
• The ESV uses linear or circular polarization.
• The ESV operates through a geostationary satellite at least 2° away from any other geostationary satellite
operating in the same frequency band and covering the same area.
The ESV transmits at elevations greater or equal to the minimum elevation angle defined for the intended use of the
ESV:
• The ESV antenna diameter is not smaller than 2,4 m.
• The ESV is designed for transmission and reception of radio-communications signals in accordance with any
of the frequency bands specified above.
• The ESV is designed for unattended operation.
• The ESV is operating within a satellite network (e.g. star, mesh or point-to-point) used for the distribution
and/or exchange of information between users.
• The ESV is controlled and monitored by a Network Control Facility (NCF). The specifications associated to
the NCF are outside the scope of the present document.
The present document applies to the ESV with its ancillary equipment and its various telecommunication ports, and
when operated within the boundary limits of the operational environmental profile as defined for the intended use of the
ESV including all equipment as brought to the market defined for the intended use of the ESV.
The present document is intended to cover the provisions of Directive 2014/53/EU [i.8] (RE Directive) article 3.2.
NOTE: The relationship between the present document and essential requirements of article 3.2 of the
Directive 2014/53/EU [i.8] is given in Annex A.
ETSI
10 Draft ETSI EN 301 447 V2.1.12 (2026-08)
2 Referenc
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