SIST ETS 300 740 E1:2006

• Abstract:

  This European Telecommunication Standard (ETS) provides specifications for the standardization of the characteristics of Maritime Mobile Earth Stations (MMESs) not providing those distress and safety functions required by the International Maritime Organization (IMO) with both transmit and receive capabilities in order to limit interference to radio communications services. The geostationary satellite networks referred to in this ETS operate under the Maritime Mobile Satellite Service (MMSS). The MMESs operate as part of a geostationary satellite network providing Low Bit-Rate Data Communications (LBRDC). The MMESs could consist of a number of modules including a keyboard interface to the user.; The main specifications are contained in three categories related to:; - safety: to protect persons from potentially dangerous RF power densities;; - unwanted emissions: to protect terrestrial and satellite radio services from harmful interference;; - MMES control and monitoring: to specify a minimum set of Control and Monitoring Functions (CMF) to be implemented on each MMES in order to minimize the probability that they originate unwanted transmissions that may give rise to harmful interference to other systems.; Additionally to these specifications the satellite operator may require other specifications or different limits.

• Status: Published
• Publication Date: 31-Jan-2006
• ICS: 33.060.30 - Radio relay and fixed satellite communications systems
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Feb-2006
• Due Date: 01-Feb-2006
• Completion Date: 01-Feb-2006
• Ref Project: ETSI ETS 300 740 ed.1 (1997-04) - Satellite Earth Stations and Systems (SES); Maritime Mobile Earth Stations (MMES) operating in the 1,5/1,6 GHz bands providing Low Bit Rate Data Communications (LBRDC) in the Maritime Mobile Satellite Service (MMSS), not intended for distress and safety communications

Overview

SIST ETS 300 740 E1:2006 specifies requirements for Maritime Mobile Earth Stations (MMES) operating in the 1.5/1.6 GHz frequency bands under the Maritime Mobile Satellite Service (MMSS). These stations are intended for provision of low bit rate data communications (LBRDC) and are not meant for distress or safety communications as defined by the International Maritime Organization (IMO).

This European Telecommunication Standard addresses technical criteria to support standardization, enhance safety, and reduce electromagnetic interference with other radio communications services. Compliance ensures that MMES operating in geostationary satellite networks maintain system integrity and operational safety while minimizing unwanted emissions.

Key Topics

• Safety Requirements: Provisions are included to protect personnel from exposure to potentially harmful radio frequency (RF) power densities. Mandatory labeling and operational procedures help prevent accidental exposure during installation and maintenance.
• Unwanted Emissions: The standard sets stringent limits for emissions both outside and within the operational frequency bands. This reduces potential interference with terrestrial and satellite services, supporting spectrum management.
• Control and Monitoring Functions (CMF): MMES units must implement minimum control and monitoring functionalities, including processor and transmission monitoring, power-on/reset safeguards, and network authorization controls. These reduce the risk of rogue or unintended transmissions.
• Environmental Testing: Requirements cover performance under varying conditions of temperature, humidity, voltage, and vibration to ensure reliable operation across maritime environments.
• Testing and Verification: The document prescribes robust test procedures for emissions and functionality, including use of special test equipment (STE) and standardized measurements for compliance assessment.

Applications

The SIST ETS 300 740 E1:2006 standard is critical for manufacturers, operators, and regulatory authorities involved with:

• Maritime Data Services: Facilitates non-safety-related communications such as vessel management, crew contact, and remote monitoring where high reliability is needed, but distress signaling is not required.
• Satellite Communications Equipment: Ensures maritime earth stations are compatible with MMSS networks and support low bit rate applications, without impacting adjacent satellite or terrestrial services.
• Fleet and Vessel Operators: Assists in the deployment and maintenance of compliant MMES hardware, promoting operational continuity and regulatory approval.
• Regulatory Compliance: Supports certification processes by providing clear benchmarks for emission limits, safety features, and equipment control measures.

Related Standards

For full compliance and integration, it is essential to reference the following related standards:

• ETS 300 459: Addresses Network Control Facilities (NCF) for MMES networks in relevant frequency bands.
• EN 55022: Specifies limits and methods for measuring radio interference characteristics of information technology equipment.
• CISPR Publication No. 16: Details methods and apparatus for measuring radio interference.
• IEC 510-2-1: Outlines measurement methods for radio equipment used in satellite earth stations.
• ITU Radio Regulations: Provides the global regulatory framework for frequency allocations and coordination.

Practical Value

Adhering to SIST ETS 300 740 E1:2006 offers:

• Assurance of interoperability within international MMSS networks.
• Protection against harmful interference to critical communication systems.
• Safer working environments for maritime personnel.
• Streamlined certification processes for manufacturers and operators.

By following this standard, stakeholders in maritime communications can ensure their systems are robust, compliant, and capable of delivering reliable low bit rate data services at sea.

SLOVENSKI STANDARD
01-februar-2006
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Satellite Earth Stations and Systems (SES); Maritime Mobile Earth Stations (MMES)
operating in the 1,5/1,6 GHz bands providing Low Bit Rate Data Communications
(LBRDC) in the Maritime Mobile Satellite Service (MMSS), not intended for distress and
safety communications
Ta slovenski standard je istoveten z: ETS 300 740 Edition 1
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.

EUROPEAN ETS 300 740
TELECOMMUNICATION April 1997
STANDARD
Source: ETSI TC-SES Reference: DE/SES-05003
ICS: 33.020
Key words: Maritime, mobile, satellite, service, MMSS, earth station, MES, data, LBRDC
Satellite Earth Stations and Systems (SES);
Maritime Mobile Earth Stations (MMES)
operating in the 1,5/1,6 GHz bands
providing Low Bit Rate Data Communications (LBRDC)
in the Maritime Mobile Satellite Service (MMSS),
not intended for distress and safety communications
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail]
Tel.: [phone] - Fax: [phone]
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 1997. All rights reserved.

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ETS 300 740: April 1997
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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ETS 300 740: April 1997
Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Definitions and abbreviations .8
3.1 Definitions .8
3.2 Abbreviations .8
4 Tests.8
4.1 Special Test Equipment (STE) .8
4.2 Test report .9
5 Radio Frequency (RF).9
5.1 Radio frequency radiation protection .9
5.2 Unwanted emissions outside the band 1 626,5 - 1 645,5 MHz.10
5.3 Maximum unwanted emission within the band 1 626,5 - 1 645,5 MHz.13
6 MMES Control and Monitoring Functions (CMF) .14
6.1 General .14
6.1.1 Monitoring functions .14
6.1.1.1 Processor monitoring.14
6.1.1.2 Transmit frequency sub-system .14
6.1.2 POWER ON/RESET .15
6.1.3 Network control reception and authorization .15
6.1.3.1 Network control authorization .15
6.1.3.2 Network control reception.15
6.2 Initial burst rate transmission .16
7 Network Control Facilities (NCF) for MMES networks .16
Annex A (normative): Unwanted emissions above 1 GHz - test procedure .17
A.1 Introduction.17
A.2 Measuring apparatus.17
A.3 Test set-up .17
A.4 Measuring procedure .17
A.5 Alternative measuring procedure .18
Annex B (normative): Environmental conditions .19
B.1 General.19
B.2 Environmental requirements .19
B.2.1 Temperature .19
B.2.2 Voltage.19
B.2.3 Vibration.19
B.3 Environmental test conditions .20
History.21

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ETS 300 740: April 1997
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ETS 300 740: April 1997
Foreword
This European Telecommunication Standard (ETS) has been produced by the Satellite Earth Stations and
Systems (SES) Technical Committee of the European Telecommunications Standards Institute (ETSI).
Transposition dates
Date of adoption: 7 March 1997
Date of latest announcement of this ETS (doa): 31 July 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 January 1998
Date of withdrawal of any conflicting National Standard (dow): 31 January 1998

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ETS 300 740: April 1997
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ETS 300 740: April 1997
1 Scope
This European Telecommunication Standard (ETS) provides specifications for the standardization of the
characteristics of Maritime Mobile Earth Stations (MMESs) not providing those distress and safety
functions required by the International Maritime Organization (IMO) with both transmit and receive
capabilities in order to limit interference to radio communications services.
The geostationary satellite networks referred to in this ETS operate under the Maritime Mobile Satellite
Service (MMSS). The MMESs operate as part of a geostationary satellite network providing Low Bit-Rate
Data Communications (LBRDC). The frequency bands allocated by the Radio Regulations [5] to the
MMSS are as follows:
MMSS
Transmit frequencies 1 626,5 to 1 645,5 MHz
Receive frequencies 1 525,0 to 1 545,0 MHz
The MMESs could consist of a number of modules including a keyboard interface to the user.
The main specifications are contained in three categories related to:
- safety: to protect persons from potentially dangerous RF power densities;
- unwanted emissions: to protect terrestrial and satellite radio services from harmful interference;
- MMES control and monitoring: to specify a minimum set of Control and Monitoring Functions
(CMF) to be implemented on each MMES in order to minimize the probability that they originate
unwanted transmissions that may give rise to harmful interference to other systems.
Additionally to these specifications the satellite operator may require other specifications or different limits.
2 Normative references
This ETS incorporates, by dated or undated references, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed
hereafter. For dated references subsequent amendments to, or revisions of, any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] CISPR Publication No. 16 (1987): "CISPR specification for radio interference
measuring apparatus and measurement methods".
[2] EN 55022: "Limits and methods of measurement of radio interference
characteristics of information technology equipment".
[3] IEC 510-2-1 (1978): "Methods of measurement for radio equipment used in
satellite earth stations, Part 2: Measurement for sub systems".
[4] ETS 300 459: "Satellite Earth Stations and Systems (SES); Network Control
Facilities (NCF) for Maritime Mobile Earth Stations (MMES) operating in the
1,5/1,6 GHz and 11/12/14 GHz bands providing Low Bit Rate Data
Communications (LBRDC)".
[5] ITU Radio Regulations (1994).

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ETS 300 740: April 1997
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
Internally Mounted Equipment (IME): Equipment or units designed to be protected from the weather.
Externally Mounted Equipment (EME): Equipment or units designed to be exposed to the weather.
nominated bandwidth: The bandwidth of the MMES radio frequency transmission is nominated by the
manufacturer. The nominated bandwidth encompasses all spectral elements of the transmission which
have a level greater than the specified spurious levels. The nominated bandwidth is wide enough to take
account of the transmit carrier frequency stability. The nominated bandwidth is within the MMSS transmit
frequency band within which the MMES operates.
unwanted emissions: Unwanted emissions are emissions falling outside the nominated bandwidth.
Special Test Equipment (STE): Specific equipment which enables the tests specified in this ETS to be
carried out.
Equipment Under Test (EUT): For the purpose of this ETS the EUT includes all units necessary for
intended operation.
This includes:
- the Externally Mounted Equipment (EME);
- the Internally Mounted Equipment (IME) including the data terminal equipment such as keyboard,
Video Display Units (VDU), printer, etc.;
- all interconnecting cables and power supply leads.
3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
ac alternating current
CMF Control and Monitoring Function
EIRP Equivalent Isotropically Radiated Power
EME Externally Mounted Equipment
EUT Equipment Under Test
IME Internally Mounted Equipment
IMO International Maritime Organization
LBRDC Low Bit Rate Data Communication
MES Mobile Earth Station
MMES Maritime Mobile Earth Station
MMSS Maritime Mobile Satellite Service
NCF Network Control Facilities
RF Radio Frequency
STE Special Test Equipment
4 Tests
4.1 Special Test Equipment (STE)
The STE shall be supplied by the manufacturer or system provider. Since the STE will be specific for the
particular system, it is not possible to provide detailed specifications in this ETS. However, the following
baseline is provided:
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ETS 300 740: April 1997
- special test arrangements are required to simulate the satellite signal, thus enabling the MMES to
transmit, to allow measurement of transmission parameters;
- any specification of these special test arrangements which may have direct or indirect effects on
any specification of this ETS shall be clearly stated by the manufacturer;
- when using the STE it shall be ensured that no transmission to the satellite occurs.
4.2 Test report
The test report shall contain:
- the value of the nominated bandwidth declared by the manufacturer;
- the results of the tests;
- all parameters and operational conditions.
5 Radio Frequency (RF)
In this clause, whenever a change of limit between adjacent frequency bands occurs, the lower of the
two limits shall apply at the transition frequency.
5.1 Radio frequency radiation protection
Purpose:
To ensure the protection of persons from potentially dangerous RF power densities.
Specification:
The radiating part of the equipment (which includes the exterior of any radome or other antenna enclosure
where fitted) shall be labelled with a warning notice which shall be clearly visible when the equipment is in
its normal operating configuration. This notice shall indicate the closest distances to the radiating part
within which a person may approach the equipment without experiencing radio frequency power density
levels in excess of 8, 10, 25 and 100 W/m , when under worst case conditions (e.g. maximum power,
maximum on/off ratio), averaged over a 6 minute period. This notice shall also state that before
approaching the radiating part within any distance closer than that indicated, the MMES equipment shall
be switched-off or otherwise disabled so that it shall not transmit.
Where the radiating part is mounted in a position where it is not normally visible, further warning notices
shall be provided to be attached to the ship so as to be clearly visible to anyone attempting to reach the
radiating part of the equipment.
In the case where the antenna is enclosed in a radome, or other antenna enclosure, and when no
RF power density greater than 8 W/m , when under worst case conditions (e.g. maximum power,
maximum on/off ratio), averaged over a 6 minute period, is produced outside of this radome, or antenna
enclosure, then it is not necessary to label the radiating part or provide labels for the ship in the manner
indicated above. Instead, the external surface of the radome or the antenna enclosure shall be clearly
labelled with a warning that the MMES equipment shall be switched-off, or otherwise disabled, so that it
shall not transmit before any work requiring the removal of the radome or antenna enclosure takes place.
Verification:
Verification of the distances below which exist RF power densities in excess of 8, 10, 25 and 100 W/m ,
when under worst case conditions (e.g. maximum power, maximum on/off ratio) averaged over a 6 minute
period, shall be demonstrated by documentary evidence. The manufacturer shall quantify the worst case
conditions.
Conformance with the labelling requirements of this subclause shall be demonstrated by visual inspection
of the radiating part and, if relevant, an examination of the notices provided by the manufacturer.

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ETS 300 740: April 1997
5.2 Unwanted emissions outside the band 1 626,5 - 1 645,5 MHz
Purpose:
Protection of terrestrial and satellite services from emissions caused by MMESs outside the band 1 626,5
to 1 645,5 MHz.
Specification:
The unwanted emissions from the MMES outside the band 1 626,5 to 1 645,5 MHz within which the
MMES is designed to operate shall be below the following limits.
For unwanted emissions below 1 GHz, the levels of field strength shall not exceed the values given in
figure 1.
Measuring Distance 3 m Measuring Distance 10 m
dBμμV/m
44 156 - 165 MHz
1 000
0,1 0,15 0,3 1 10 30 100 Frequency (MHz)
Figure 1: Maximum level of field strength of unwanted emissions at the distances specified above
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ETS 300 740: April 1997
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ETS 300 740: April 1997
The unwanted emissions EIRP above 1 GHz in the measurement bandwidth and in all directions shall not
exceed the following limits:
Table 1: Unwanted emissions EIRP above 1 GHz
Frequency range Carrier-on Carrier-off
EIRP limit Measurement EIRP limit Measurement
(MHz) (dBpW) bandwidth (kHz) (dBpW) bandwidth (kHz)
1 000 - 1 525 49 100 48 100
1 525 - 1 559 49 100 17 3
1 559 - 1 600 49 100 48 100
1 600 - 1 623,5 74 100 48 100
1 623,5 - 1 626 74 (note 1) 100 (note 1) 48 100
1 626 - 1 626,5 84 3 48 100
1 645,5 - 1 645,6 104 3 57 3
1 645,6 - 1 646,1 84 3 57 3
1 646,1 - 1 661 74 3 57 3
1 661 - 1 663,5 74 (note 1) 100 (note 1) 48 100
1 663,5 - 1 690
...