oSIST prEN 301 447 V2.1.12:2026

• Abstract:

  REN/SES-00433

• Status: Not Published
• Public Enquiry End Date: 30-Nov-2026
• ICS: 33.060.30 - Radio relay and fixed satellite communications systems
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: MOC - Mobile Communications
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 21-Sep-2026
• Due Date: 08-Feb-2027
• Ref Project: ETSI EN 301 447 V2.1.12 (2026-08) - 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

oSIST prEN 301 447 V2.1.12:2026 is the Slovenian standard identical to ETSI EN 301 447 V2.1.12, published by SIST. It specifies technical characteristics and measurement methods for Satellite Earth Stations on board Vessels (ESVs) operating in the 4/6 GHz frequency bands of the Fixed Satellite Service (FSS), so manufacturers, test labs, and network operators can assess access to radio spectrum. It is a harmonised European Standard prepared for the Radio Equipment Directive (RED) article 3.2.

What does oSIST prEN 301 447 V2.1.12:2026 specify?

oSIST prEN 301 447 V2.1.12:2026 specifies the requirements and test methods for complete ESV equipment, from the antenna to the terrestrial interface. The standard is written for vessels using geostationary satellite links in the lower 6 GHz maritime FSS bands.

The scope covers ESVs that transmit in 5 925 MHz to 6 425 MHz and receive in 3 700 MHz to 4 200 MHz, use a single carrier, and use linear or circular polarization. It applies to systems intended for unattended operation, controlled by a Network Control Facility (NCF), and operating with a geostationary satellite at least 2° away from any other geostationary satellite in the same band and area.

It also applies to ancillary equipment and the relevant telecommunication ports, within the declared operational environmental profile. The standard excludes installation requirements, the reception/processing/presentation functions of the below-deck unit except for the control channel, and the syntax of control channel messages.

Annex	What it covers
Annex A	Relationship between the standard and the essential requirements of Directive 2014/53/EU
Annex B	Mechanical stability methodology
Annex C	Maximum measurement uncertainty
Annex D	Bibliography
Annex E	Change history

What are the key requirements of oSIST prEN 301 447 V2.1.12:2026?

Operating profile and radio states

oSIST prEN 301 447 V2.1.12:2026 requires the ESV to operate within the environmental classes of IEC EN 60945, using the "protected" class for below-deck equipment and the "exposed" class for above-deck equipment. That matters because the terminal has to keep meeting the RF requirements in marine conditions, not only in a laboratory.

Clause 4.1.4 defines the valid combinations of ESV states and radio states, including "Non valid", "Initial phase", "Transmission enabled", and "Transmission disabled", together with "Emissions disabled", "Carrier-off", and "Carrier-on". In practice, this state logic is the control layer that decides when the terminal may transmit and when it must stop.

Emissions limits and antenna behavior

Clauses 4.2.1 to 4.2.7 cover on-axis emissions, transmit antenna gain patterns, spurious radiation, emissions toward the horizon, off-axis e.i.r.p. emission density, and carrier suppression. These clauses are there to limit interference to other satellite and radio systems.

The standard uses measurement methods at the antenna flange or with a test antenna, and it ties several checks to the nominated bandwidth and to measurement bandwidths such as 100 kHz. For spurious and off-axis checks, the practical goal is to show that unwanted radiation stays within the declared masks across the operating states of the ESV, including "Carrier-on", "Carrier-off", and "Emissions disabled".

Clause 4.2.3 applies spurious-radiation limits to the complete ESV equipment, including both below-deck and above-deck units and the cabling between them. Clause 4.2.4 adds an on-axis spurious-radiation limit that depends on the factor K when multiple ESVs may transmit toward the same satellite, so the declared network use matters.

Clause 4.2.6 restricts off-axis e.i.r.p. emission density only in directions close to the geostationary satellite orbit. The reader needs to define the relevant operating subset for the intended use, including latitude range, minimum elevation angle, antenna mount type, and declared alignment errors.

Pointing and polarization

Clause 4.2.8 requires antenna pointing and polarization alignment capability. In practice, this means the terminal must be able to aim and keep the beam on the satellite accurately enough, and the polarization performance must match the declared use.

The clause covers cross-polarization discrimination (XPD) and, for circular polarization, the maximum axial ratio. That matters because poor alignment or polarization control can raise interference to adjacent satellite networks.

Cessation of emissions and control and monitoring

Clause 4.2.9 sets the conditions under which the ESV shall stop transmitting, including being outside the authorized operating area, being outside the authorized frequency and bandwidth, being below the required vessel speed, being below the required antenna elevation, or exceeding the allowed on-axis power spectral density. It also requires emissions to stop within 5 s after a cessation condition appears.

Clause 4.2.11 requires Control and Monitoring Functions (CMF), at least one Control Channel (CC) and one Response Channel (RC), and a unique identification code stored in non-volatile memory. It also defines the behavior for Transmission Enable (TxE) and Transmission Disable (TxD) commands, CC disruption, and the handling of initial burst transmission. In practice, this is the part that links the RF terminal to network control and safety interlocks.

Receive-side performance

Clauses 4.2.12 to 4.2.14 cover the receive antenna off-axis gain pattern, blocking performance, and adjacent signal selectivity. Annex A shows that the receive antenna off-axis gain requirement is conditional, while blocking and adjacent signal selectivity are treated as unconditional requirements.

These receiver-side checks matter when the vessel operates in a dense satellite environment, because they show how well the terminal rejects unwanted nearby signals and how predictable the receive antenna pattern is for network planning.

What terms does oSIST prEN 301 447 V2.1.12:2026 define?

• Earth Station on board Vessel (ESV) - the complete equipment brought to market, including the outdoor unit, indoor unit, and the connecting cable(s) between them.
• Network Control Facility (NCF) - the set of functional entities that monitor and control the correct operation of all ESVs in a network.
• Control Channel (CC) - the channel by which an ESV receives control information from the NCF.
• Response Channel (RC) - the channel by which an ESV sends monitoring information back to the NCF.
• Carrier-on radio state - the state in which the ESV may transmit and is actually transmitting a carrier.
• Emissions disabled radio state - the state in which the ESV is not emitting.
• Nominated bandwidth - the transmit bandwidth nominated for the intended use of the ESV, centered on the transmit frequency and wide enough to include all relevant spectral elements.
• Equivalent Isotropically Radiated Power (EIRP) - the maximum on-axis radiated power capability of the ESV for its intended use.

Who uses oSIST prEN 301 447 V2.1.12:2026?

oSIST prEN 301 447 V2.1.12:2026 is used by ESV manufacturers, antenna and terminal designers, test laboratories, conformity assessment teams, satellite network operators, and maritime system integrators. It is also relevant to quality managers and buyers who need to specify or verify spectrum-compliant shipborne satellite equipment.

In practice, these users apply it to design RF masks, define control-and-monitoring behavior, prepare test plans, run laboratory measurements, and document conformity for RED-related assessment.

Which standards are used with oSIST prEN 301 447 V2.1.12:2026?

Normative references

• IEC EN 60945:2002 - provides the maritime environmental test framework used for the ESV environmental classes and test conditions.
• ITU Radio Regulations (2024 edition) - provide the international spectrum allocation and regulatory basis used by the standard.
• ERC/REC 74-01 - supports the treatment of unwanted emissions in the spurious domain.

Useful companion references named in the document

• ITU RR Resolution 902 (Rev. WRC-23) - provides the ESV operating provisions that the standard is based on.
• ECC Report 069 and ECC Report 091 - support operation near coastal areas and gaps in the lower 6 GHz band.
• ETSI TR 102 375 - gives guidance for identifying the antenna pattern regions relevant to geostationary orbit protection.
• ETSI TR 102 215 - gives guidance on measurement uncertainty above 1 GHz.
• ETSI EG 203 336 - gives guidance for selecting technical parameters in harmonised standards.

What does the oSIST prEN 301 447 V2.1.12:2026 document contain?

The document contains a state model for ESV and radio states, a table of state combinations, and multiple conformance clauses tied to emissions, antenna behavior, control functions, and receiver performance. It also contains test methods for conducted and radiated measurements, including test arrangements, measurement procedures, and acceptance checks.

Several figures show the test setups for spurious radiation, antenna pattern measurements, and control-and-monitoring tests. The document also includes a detailed CMF state diagram and a set of measurement uncertainty recommendations in Annex C.

Annex B gives a two-stage mechanical stability methodology based on analytical or numerical load calculations and application of equivalent static loads to the above-deck unit. Annex A maps the standard’s clauses to the essential requirements of Directive 2014/53/EU, which helps users understand why each technical requirement is included.

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
ETSI
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
ETSI
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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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
...

SLOVENSKI STANDARD
01-november-2026
Satelitske zemeljske postaje in sistemi (SES) - Satelitske zemeljske postaje na
ladjah, ki delujejo v frekvenčnih pasovih 4/6 GHz, dodeljenih za fiksne satelitske
storitve (FSS) - Harmonizirani standard za dostop do radijskega spektra
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
Ta slovenski standard je istoveten z: ETSI EN 301 447 V2.1.12 (2026-08)
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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
Essential patents
IPRs essential or potentially essential to normative deliverables (European Standard (EN), Technical Specification (TS),
Group Specification (GS) or ETSI Standard (ES)) may have been declared to ETSI. The declarations pertaining to these
essential IPRs, if any, are publicly available for ETSI members and non-members, and can be found in
ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
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ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
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DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its
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3GPP Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of ®
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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 E
...