SIST EN 301 427 V1.2.1:2004

• Abstract:

  The new R&TTE Directive implies the conversion of existing TBRs. TC SES decided during SES#40 to accelerate the process, and planned to send TBR26, TBR27, TBR28, TBR30,TBR41, TBR42, TBR43 and TBR44 to OAP during a dedicated TC SES #42 meeting (30/11-3/12/99).

• Status: Published
• Publication Date: 30-Sep-2004
• ICS: 33.060.30 - Radio relay and fixed satellite communications systems
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Oct-2004
• Due Date: 01-Oct-2004
• Completion Date: 01-Oct-2004
• Directive: 1999/5/EC - Directive 1999/5/EC of the European Parliament and of the Council of 9 March 1999 on radio equipment and telecommunications terminal equipment and the mutual recognition of their conformity
  Conflicting Date: 31-Aug-2003
• Directive:

  ---

  2005-01-1864 - Pravilnik o radijskih frekvencah, ki se smejo uporabljati brez odločbe o dodelitvi radijskih frekvenc
• Directive:

  ---

  TRRTP124 - Splošni akt o načrtu uporabe radijskih frekvenc (NURF-4)
• Mandate: M/284
• Ref Project: ETSI EN 301 427 V1.2.1 (2001-11) - Satellite Earth Stations and Systems (SES); Harmonized EN for Low data rate Mobile satellite Earth Stations (MESs) except aeronautical mobile satellite earth stations, operating in the 11/12/14 GHz frequency bands covering essential requirements under article 3.2 of the R&TTE directive

• Official Journal Project Relation: SIST EN 301 427:2001 - Satellite Earth Stations and Systems (SES); Harmonized EN for Low data rate Land Mobile satellite Earth Stations (LMES) operating in the 11/12/14 GHz frequency bands covering essential requirements under article 3.2 of the R&TTE directive
• Effective Date: 01-Dec-2009

SIST EN 301 427 V1.2.1:2004 is the Slovenian adoption of ETSI EN 301 427 V1.2.1, published by SIST. It is a harmonized European standard for low data rate Mobile Earth Stations (MESs), except aeronautical mobile satellite earth stations, operating in the 11/12/14 GHz bands. The standard sets radio-spectrum limits, control and monitoring functions, and test methods for manufacturers, test laboratories, and conformity assessment teams working under the R&TTE Directive.

What does SIST EN 301 427 V1.2.1:2004 specify?

SIST EN 301 427 V1.2.1:2004 specifies the technical requirements and test methods for MESs used in the Fixed Satellite Service (FSS) frequency ranges 10.70 GHz to 11.70 GHz, 12.50 GHz to 12.75 GHz, and 14.00 GHz to 14.25 GHz. It is focused on spectrum use and interference control, not on installation.

The scope covers Land Mobile Earth Stations (LMESs) and Maritime Mobile Earth Stations (MMESs) that do not provide International Maritime Organization (IMO) distress and safety functions. The MES may be vehicle mounted, portable, or ship installable, may use one or more modules, and uses linear polarization.

The standard also assumes operation through a geostationary satellite at least 3° away from other geostationary satellites using the same band and serving the same area. The Network Control Facility (NCF) is outside the scope, and the document does not give installation requirements.

The document is organized into these main clauses:

• Clause 1 - Scope
• Clause 2 - References
• Clause 3 - Definitions and abbreviations
• Clause 4 - Technical requirement specifications
• Clause 5 - Testing for compliance with technical requirements
• Clause 6 - Test methods

Annex	What it covers
Annex A	The EN Requirements Table (EN-RT), used as a summary of the requirements
Annex B	Bibliography

What are the key requirements of SIST EN 301 427 V1.2.1:2004?

SIST EN 301 427 V1.2.1:2004 centers on five technical areas: environmental conditions, unwanted emissions, off-axis radiation, and control and monitoring behavior. These are the points that matter most in practice because they determine whether the equipment can be placed on the market and whether it will disturb other radio services.

Environmental profile and test conditions

Clause 4.1 requires the manufacturer to declare the operational environmental profile, including humidity, temperature, and supply voltage ranges. The equipment must meet the technical requirements within those declared limits. In practice, that means the declared operating envelope becomes part of the compliance case and the test report.

Clause 5.1 says tests are performed at representative points within that declared profile. Clause 6 adds that the manufacturer’s declared technical characteristics and operational conditions are recorded in the test report.

Unwanted emissions outside the 14.00 GHz to 14.25 GHz band

Clause 4.2.1 sets limits for unwanted emissions outside the 14.00 GHz to 14.25 GHz transmit band. Separate limits apply below 1 000 MHz and above 1 000 MHz, and the requirements distinguish between carrier-on and carrier-off operation. In practice, labs must check both low-frequency radiated emissions and higher-frequency EIRP emissions so the MES does not interfere with terrestrial or satellite services.

Clause 6.1 describes how those emissions are measured. It covers open area, semi-anechoic, and anechoic test sites, antenna placement, rotation axes, and the use of measuring receivers or spectrum analyzers depending on frequency.

Unwanted emissions within the band

Clause 4.2.2 protects primary services in the 14.00 GHz to 14.25 GHz band. In carrier-on state, the unwanted emission spectral density is limited relative to the number of MESs expected to transmit at the same time, and the manufacturer declares that number and the operating conditions. In carrier-off state, the emission limit is fixed.

In practice, this clause forces the manufacturer to define how the system is loaded and how many units may transmit together. The corresponding test methods in clause 6.2 allow measurements at the antenna flange or with a test antenna, depending on what the manufacturer makes available.

Off-axis EIRP emissions density

Clause 4.2.3 limits off-axis EIRP density in the nominated bandwidth so that directional antennas do not overload other satellite systems. The limit depends on the angle from the antenna main beam axis, the antenna tracking or pointing accuracy, and the power density ratio K between a fully loaded system and a single MES.

For directional antennas, the test report must include K, the technical characteristics, and the declared operating conditions. For non-directional antennas, a simpler limit applies. Clause 6.3 explains how this is checked by measuring static rms antenna pointing accuracy, transmitter power density, antenna gain, and antenna radiation patterns, then comparing the result with a mask.

Control and Monitoring Functions (CMF)

Clause 4.2.4 defines the minimum Control and Monitoring Functions (CMF) needed to reduce the risk of unwanted transmissions. Processor monitoring must detect processor hardware and software failures and force the MES into carrier-off state within 1 second. Transmit subsystem monitoring must do the same within 5 seconds after a frequency-generation fault.

The same clause requires safe behavior after power-on or reset, correct handling of Control Channel (CC) reception, response to NCF transmission enable and disable commands, and identification response on request. For systems that do not expect a transmission enable command after reset, only short initial bursts are allowed, and these are tightly limited in time. In practice, this is the part that shows whether the MES fails safe when control is lost.

Measurement quality and test setup

Clause 6 sets measurement uncertainty limits and allows Special Test Equipment (STE) when needed to simulate satellite signals. Carrier-on tests use full transmit power and, where applicable, the maximum burst rate. This matters because the test setup must reproduce realistic operating conditions, not just a simplified laboratory state.

What terms does SIST EN 301 427 V1.2.1:2004 define?

• Carrier-off state - The MES is authorized to transmit but is silent, or it is not authorized to transmit at all; this is the safe state used after faults or loss of control.
• Carrier-on state - The MES is authorized to transmit and is actively sending a signal.
• Control Channel (CC) - The channel or channels through which the MES receives control information from the NCF.
• Environmental profile - The declared range of humidity, temperature, and supply voltage within which the MES must comply.
• Nominated bandwidth - The manufacturer-selected bandwidth that contains the relevant spectral elements of the transmission and stays within the transmit band.
• Equivalent Isotropically Radiated Power (EIRP) - A power measure that expresses what the transmitted signal would be if radiated equally in all directions.
• Installable Equipment (IE) - Equipment intended to be fitted to a vehicle, possibly made of several interconnected modules.

Who uses SIST EN 301 427 V1.2.1:2004?

Manufacturers of low data rate MESs use this standard to design transmitters, antennas, control logic, and monitoring functions that fit the band and interference limits. Test laboratories use it to set up emissions and antenna measurements, including carrier-on and carrier-off checks.

Quality and compliance teams use it to prepare declarations, test reports, and conformity evidence for LMES and MMES products. Satellite network operators and system integrators also use it when defining network control behavior, because the manufacturer must declare operating conditions such as the number of simultaneous transmitters.

What changed in SIST EN 301 427 V1.2.1:2004 from the previous edition?

The history shows an earlier publication, V1.1.1, followed by V1.2.1. V1.2.1 was published in November 2001 after a one-step approval procedure, and the Slovenian edition is the 2004 adoption of that version.

Which standards are used with SIST EN 301 427 V1.2.1:2004?

Directive 1999/5/EC is the legal reference behind the standard and defines the R&TTE framework that the document addresses. CISPR 16-1 contributes the specification for radio disturbance and immunity measuring apparatus and methods, which supports the measurement approach used in the test clauses.

The document is also based on ETSI TBR 027, which is named in the introduction and bibliography as the earlier technical basis for low data rate LMESs in the same bands.

What does the SIST EN 301 427 V1.2.1:2004 document contain?

SIST EN 301 427 V1.2.1:2004 contains clause-by-clause requirements, justifications, and conformance test descriptions for emissions and control behavior. It includes the EN Requirements Table in Annex A, which summarizes the requirements for conformity assessment.

The test section contains measurement arrangements, antenna and rotation setups, substitution methods, and procedures for both conducted and radiated measurements. It also includes figures for the test arrangements, a measurement-uncertainty table, and detailed sequences for processor failure, transmit subsystem failure, power-on/reset, CC loss, network commands, and initial burst checks.

SLOVENSKI STANDARD
01-oktober-2004
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Satellite Earth Stations and Systems (SES); Harmonized EN for Low data rate Mobile
satellite Earth Stations (MESs) except aeronautical mobile satellite earth stations,
operating in the 11/12/14 GHz frequency bands covering essential requirements under
article 3.2 of the R&TTE directive
Ta slovenski standard je istoveten z: EN 301 427 Version 1.2.1
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Candidate Harmonized European Standard (Telecommunications series)

Satellite Earth Stations and Systems (SES);
Harmonized EN for Low data rate
Mobile satellite Earth Stations (MESs)
except aeronautical mobile satellite earth stations,
operating in the 11/12/14 GHz frequency bands
covering essential requirements
under article 3.2 of the R&TTE directive

2 ETSI EN 301 427 V1.2.1 (2001-11)

Reference
REN/SES-00062
Keywords
Earth station, LMES, MES, mobile, regulation,
satellite
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© European Telecommunications Standards Institute 2001.
All rights reserved.
ETSI
3 ETSI EN 301 427 V1.2.1 (2001-11)
Contents
Intellectual Property Rights.6
Foreword.6
Introduction .7
1 Scope.9
2 References.10
3 Definitions and abbreviations.10
3.1 Definitions.10
3.2 Abbreviations.11
4 Technical requirement specifications.11
4.1 Environmental profile.11
4.2 Conformance requirements.11
4.2.1 Unwanted emissions outside the band .11
4.2.1.1 Justification.11
4.2.1.2 Specification.11
4.2.1.3 Conformance tests.12
4.2.2 Unwanted emissions within the band .12
4.2.2.1 Justification.12
4.2.2.2 Specification.12
4.2.2.3 Conformance tests.12
4.2.3 Off-axis EIRP emissions density in the nominated bandwidth.13
4.2.3.1 Justification.13
4.2.3.2 Specification.13
4.2.3.3 Conformance tests.13
4.2.4 Control and Monitoring Functions (CMF).13
4.2.4.1 Processor monitoring.13
4.2.4.1.1 Justification.13
4.2.4.1.2 Specification.14
4.2.4.1.3 Conformance tests.14
4.2.4.2 Transmit subsystem monitoring.14
4.2.4.2.1 Justification.14
4.2.4.2.2 Specification.14
4.2.4.2.3 Conformance tests.14
4.2.4.3 Power-on/Reset.14
4.2.4.3.1 Justification.14
4.2.4.3.2 Specification.14
4.2.4.3.3 Conformance tests.14
4.2.4.4 Control Channel (CC) reception .14
4.2.4.4.1 Justification.14
4.2.4.4.2 Specification.15
4.2.4.4.3 Conformance tests.15
4.2.4.5 Network control commands .15
4.2.4.5.1 Justification.15
4.2.4.5.2 Specification.15
4.2.4.5.3 Conformance tests.15
4.2.4.6 Initial burst transmission .15
4.2.4.6.1 Justification.15
4.2.4.6.2 Specification.16
4.2.4.6.3 Conformance tests.16
5 Testing for compliance with technical requirements.16
5.1 Environmental conditions for testing .16
5.2 Essential radio test suites.16
6 Test methods.16
ETSI
4 ETSI EN 301 427 V1.2.1 (2001-11)
6.1 Unwanted emissions outside the band 14,00 GHz to 14,25 GHz.17
6.1.1 General.17
6.1.2 Test site.17
6.1.3 Test method.17
6.1.3.1 Receive test equipment .18
6.1.3.1.1 Measuring receiver for measurements up to 1 000 MHz.18
6.1.3.1.2 Spectrum analyser for measurements above 1 000 MHz.18
6.1.4 Procedure.18
6.1.4.1 Test arrangements.18
6.1.4.2 Up to 1 000 MHz .19
6.1.4.3 Above 1 000 MHz.20
6.1.4.3.1 Identification of the significant frequencies of the radiated unwanted emissions .20
6.1.4.3.2 Measurement of radiated power levels of identified spurious radiation.20
6.1.4.3.3 Measurement of conducted unwanted emissions at the antenna flange.22
6.2 Unwanted emissions within the band 14,00 GHz to 14,25 GHz .22
6.2.1 Test method.22
6.2.1.1 General.23
6.2.1.2 Method of measurement at the antenna flange.23
6.2.1.3 Method of measurement with a test antenna .24
6.3 Off-axis EIRP emissions density in the nominated bandwidth .25
6.3.1 General.25
6.3.2 Static rms antenna pointing accuracy.25
6.3.2.1 Method of measurement.25
6.3.3 Measurement of the off-axis EIRP without the antenna .26
6.3.3.1 Transmitter output power density .26
6.3.3.1.1 Method of measurement.26
6.3.3.2 Antenna transmit gain.27
6.3.3.2.1 General.27
6.3.3.2.2 Test site.27
6.3.3.2.3 Method of measurement.27
6.3.3.3 Antenna transmit radiation patterns .28
6.3.3.3.1 General.28
6.3.3.3.2 Test site.28
6.3.3.3.3 Method of measurement.29
6.3.3.4 Computation of results .29
6.3.4 Measurement of the off-axis EIRP with the antenna .30
6.3.4.1 General.30
6.3.4.2 Maximum EIRP density per 40 kHz ratio relative to the EIRP.30
6.3.4.2.1 Method of measurement.30
6.3.4.3 Maximum on-axis EIRP.30
6.3.4.3.1 General.30
6.3.4.3.2 Test site.30
6.3.4.3.3 Method of measurement.31
6.3.4.4 Antenna transmit radiation patterns .32
6.3.4.4.1 General.32
6.3.4.4.2 Test site.32
6.3.4.4.3 Method of measurement.32
6.3.4.5 Computation of results .33
6.4 Control and monitoring.33
6.4.1 Test arrangement.34
6.4.2 Processor monitoring.34
6.4.2.1 Test method.34
6.4.3 Transmit subsystem monitoring.35
6.4.3.1 Test method.35
6.4.4 Power-on/Reset.35
6.4.4.1 Test method.35
6.4.5 Control Channel (CC) reception .35
6.4.5.1 Test method.35
6.4.6 Network control commands.36
6.4.6.1 Test method.36
6.4.7 Initial burst transmission.37
6.4.7.1 Test method.37
ETSI
5 ETSI EN 301 427 V1.2.1 (2001-11)
Annex A (normative): The EN Requirements Table (EN-RT).38
Annex B (informative): Bibliography .40
History .41

ETSI
6 ETSI EN 301 427 V1.2.1 (2001-11)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Candidate Harmonized European Standard (Telecommunications series) has been produced by ETSI Technical
Committee Satellite Earth Stations and Systems (SES).
The present document has been produced by ETSI in response to a mandate from the European Commission issued
under Council Directive 98/34/EC (as amended) laying down a procedure for the provision of information in the field of
technical standards and regulations.
The present document is intended to become a Harmonized Standard, the reference of which will be published in the
Official Journal of the European Communities referencing the Directive 1999/5/EC of the European Parliament and of
the Council of 9 March 1999 on radio equipment and telecommunications terminal equipment and the mutual
recognition of their conformity ("the R&TTE Directive") [1].
Technical specifications relevant to Directive 1999/5/EC [1] are given in annex A.

National transposition dates
Date of adoption of this EN: 2 November 2001
Date of latest announcement of this EN (doa): 28 February 2002
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 August 2002
Date of withdrawal of any conflicting National Standard (dow): 31 August 2003

ETSI
7 ETSI EN 301 427 V1.2.1 (2001-11)
Introduction
The present document is part of a set of standards designed to fit in a modular structure to cover all radio and
telecommunications terminal equipment under the R&TTE Directive [1]. Each standard is a module in the structure.
The modular structure is shown in figure 1.
Disability*
3.3f
3.3e
Emergency*
Fraud*
3.3d
Privacy*
3.3c
No harm to the network*
3.3b
* If needed
Scoped by
Interworking via the network*
Equipment
class or type
3.3a
Interworking with the network
Use of spectrum
3.2
Scoped by frequency and/or equipment type
General standard
Radio product EMC
Proposed single standard
New standard for Health for radio
(if needed)
3.1a/b
Standards notified under EMC Directive
Standards notified under LVD Directive
incl. acoustic safety if needed)
Radio (RE)
Non-radio
TTE Non-TTE
Figure 1: Modular structure for the various standards used under the R&TTE Directive
ETSI
8 ETSI EN 301 427 V1.2.1 (2001-11)
The left hand edge of the figure 1 shows the different clauses of article 3 of the R&TTE Directive [1].
For article 3.3 various horizontal boxes are shown. Dotted lines indicate that at the time of publication of the present
document essential requirements in these areas have to be adopted by the Commission. If such essential requirements
are adopted, and as far and as long as they are applicable, they will justify individual standards whose scope is likely to
be specified by function or interface type.
The vertical boxes show the standards under article 3.2 for the use of the radio spectrum by radio equipment. The
scopes of these standards are specified either by frequency (normally in the case where frequency bands are
harmonized) or by radio equipment type.
For article 3.1b figure 1 shows the new single multi-part product EMC standard for radio, and the existing collection of
generic and product standards currently used under the EMC Directive. The existing separate product EMC standards
can be used until their dates of cessation of presumption of conformity published in the O.J.E.C. For article 3.1a
figure 1 shows the existing safety standards currently used under the LV Directive and new standards covering human
exposure to electromagnetic fields. New standards covering acoustic safety may also be required.
The bottom of the figure shows the relationship of the standards to radio equipment and telecommunications terminal
equipment. A particular equipment may be radio equipment, telecommunications terminal equipment or both. A radio
spectrum standard will apply if it is radio equipment. An article 3.3 standard will apply as well only if the relevant
essential requirement under the R&TTE Directive [1] is adopted by the Commission and if the equipment in question is
covered by the scope of the corresponding standard. Thus, depending on the nature of the equipment, the essential
requirements under the R&TTE Directive [1] may be covered in a set of standards.
The modularity principle has been taken because:
- it minimizes the number of standards needed. Because equipment may, in fact, have multiple interfaces and
functions it is not practicable to produce a single standard for each possible combination of functions that may
occur in an equipment;
- it provides scope for standards to be added:
• under article 3.2 when new frequency bands are agreed; or
• under article 3.3 should the Commission take the necessary decisions;
without requiring alteration of standards that are already published;
- it clarifies, simplifies and promotes the usage of Harmonized Standards as the relevant means of conformity
assessment.
The present document is based on TBR 027 (see Bibliography).
The requirements have been selected to ensure an adequate level of compatibility with other radio services. The levels,
however, do not cover extreme cases which may occur in any location but with a low probability of occurrence.
The present document may 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 it may be necessary to use special protection applied to either the source of interference, or
the interfered part or both.
The present document does not contain any requirement, recommendation or information about the installation of the
MES.
The determination of the parameters of the user earth stations using a given geostationary 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.
ETSI
9 ETSI EN 301 427 V1.2.1 (2001-11)
1 Scope
The present document applies to Mobile Earth Stations (MESs), except aeronautical mobile earth stations, which have
the following characteristics:
- The MES are operating in one or more frequency ranges of the Fixed Satellite Service (FSS):
- 10,70 GHz to 11,70 GHz (space to earth);
- 12,50 GHz to 12,75 GHz (space to earth);
- 14,00 GHz to 14,25 GHz (earth to space).
Because the transmissions from the MES to the Satellite in the 14,00 GHz to 14,25 GHz band fall under a secondary
allocation, the transmissions should not cause harmful interference to primary services (e.g. the Fixed Satellite Service
(FSS)) and at the same time cannot claim protection from harmful interference from those services.
- The MES may be either:
- a Land Mobile Earth Station (LMES) radio equipment; and/or
- a Maritime Mobile Earth Station (MMES) radio equipment not providing those distress and safety functions
required by the International Maritime Organization (IMO).
- These LMESs could be either vehicle mounted or portable equipment.
- These MMESs are installable equipment on ships.
- The MES could consist of a number of modules including a keyboard interface to the user.
- The MES use linear polarization.
- The MES operate through a geostationary satellite at least 3° away from any other geostationary satellite
operating in the same frequency band and covering the same area.
- The antenna of the MES may be omnidirectional or directional with a means of tracking the satellite.
- The MES are operating as part of a satellite network used for the distribution and/or exchange of information
between users.
- The MES are controlled and monitored by a Network Control Facility (NCF). The NCF is outside the scope of
the present document.
The present document applies to the MES with its ancillary equipment and its various terrestrial ports, and when
operated within the boundary limits of the operational environmental profile declared by the manufacturer.
The present document is intended to cover the provisions of Directive 1999/5/EC (R&TTE Directive) [1] article 3.2,
which states that "… radio equipment shall be so constructed that it effectively uses the spectrum allocated to
terrestrial/space radio communications and orbital resources so as to avoid harmful interference".
In addition to the present document, other ENs that specify technical requirements in respect of essential requirements
under other parts of article 3 of the R&TTE Directive [1] may apply to equipment within the scope of the present
document.
NOTE: A list of such ENs is included on the ETSI web site.
ETSI
10 ETSI EN 301 427 V1.2.1 (2001-11)
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
[1] Directive 1999/5/EC: "of the European Parliament and of the Council of 9 March 1999 on radio
equipment and telecommunications terminal equipment and the mutual recognition of their
conformity".
[2] CISPR 16-1: "Specification for radio disturbance and immunity measuring apparatus and methods;
Part 1: Radio disturbance and immunity measuring apparatus".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in the R&TTE Directive and the following
apply:
carrier-off state: MES is in this state when either it is authorized by the Network Control Facility (NCF) to transmit
but when it does not transmit any signal, or when it is not authorized by the NCF to transmit
carrier-on state: MES is in this state when it is authorized by the NCF to transmit and when it transmits a signal
Control Channel (CC): channel or channels by which MES receive control information from the NCF of their network
environmental profile: range of environmental conditions under which equipment within the scope of the present
document is required to comply with the provisions of the present document
Externally Mounted Equipment (EME): EME consists of those of the modules of the Installable Equipment (IE)
which are intended to be mounted externally to the vehicle as stated by the manufacturer
Installable Equipment (IE): equipment which is intended to be fitted to a vehicle
NOTE: An IE may consist of one or several interconnected modules.
Internally Mounted Equipment (IME): those of the modules of the IE which are not declared by the manufacturer as
EME are defined as IME
manufacturer: the manufacturer, his authorized representative within the Community or the person responsible for
placing the apparatus on the market
nominated bandwidth: the bandwidth of the MES radio frequency transmission is nominated by the manufacturer. The
nominated bandwidth is wide enough to encompass all spectral elements of the transmission which have a level greater
than the specified unwanted emissions limits. The nominated bandwidth is wide enough to take account of the transmit
carrier frequency stability. The nominated bandwidth is within the transmit frequency band within which the MES
operates
Portable Equipment (PE): is generally intended to be self-contained, free standing and portable. Normally, a PE
would consist of a single module, but may consist of several interconnected modules
unwanted emissions: emissions falling outside the nominated bandwidth
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11 ETSI EN 301 427 V1.2.1 (2001-11)
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
CC Control Channel
CMF Control and Monitoring Functions
EIRP Equivalent Isotropically Radiated Power
EME Externally Mounted Equipment
EUT Equipment Under Test
IE Installable Equipment
IME Internally Mounted Equipment
LMES Land Mobile Earth Station
MES Mobile Earth Station
MMES Maritime Mobile Earth Station
NCF Network Control Facility
PE Portable Equipment
RF Radio Frequency
rms root mean square
R&TTE Radio and Telecommunications Terminal Equipment
STE Special Test Equipment
4 Technical requirement specifications
4.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be declared by the manufacturer. The equipment shall comply with all the technical
requirements of the present document at all times when operating within the boundary limits of the declared operational
environmental profile.
The environmental profile for operation of the equipment shall include the ranges of humidity, temperature and supply
voltage.
4.2 Conformance requirements
4.2.1 Unwanted emissions outside the band
4.2.1.1 Justification
Protection of terrestrial and satellite services from emissions caused by MES outside the band 14,00 GHz to 14,25 GHz.
4.2.1.2 Specification
The unwanted emissions in the measurement bandwidth and in all directions from the MES outside the band 14,00 GHz
to 14,25 GHz, within which the MES is designed to operate, shall be below the following limits:
1) The unwanted emissions over the frequency range 30 MHz to 1 000 MHz shall not exceed the limits in table 1a
for LMESs and table 1b for MMESs.
Table 1a: Limits of LMESs unwanted emissions up to 1 000 MHz
at a measuring distance of 10 m in a 120 kHz bandwidth
Frequency (MHz) Quasi-peak limits (dB(µV/m))
30 to 230 30
230 to 1 000 37
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12 ETSI EN 301 427 V1.2.1 (2001-11)
Table 1b: Limits of MMESs unwanted emissions up to 1 000 MHz
at a measuring distance of 10 m in a 120 kHz bandwidth
Frequency (MHz) Quasi-peak limits (dB(µV/m))
30 to 156 30
156 to 165 14 (see note)
165 to 230 30
230 to 1 000 37
NOTE: In the band 156 MHz to 165 MHz, a 9 kHz bandwidth apply.

The lower limit shall apply at the transition frequency.
2) The unwanted emissions Equivalent Isotropically Radiated Power (EIRP) above 1 000 MHz, in the measurement
bandwidth and in all directions shall not exceed the limits given in table 2.
Table 2: Limits of unwanted emissions above 1 000 MHz and
outside the band 14,00 GHz to 14,25 GHz
Frequency range Carrier-on Carrier-off
(MHz) EIRP limit Measurement EIRP limit Measurement
(dBpW) bandwidth (kHz) (dBpW) bandwidth (kHz)
1 000 to 1 525 49 100 48 100
1 525 to 1 559 49 100 17 3
1 559 to 3 400 49 100 48 100
3 400 to 10 700 55 100 48 100
10 700 to 21 200 61 100 54 100
21 200 to 40 000 67 100 60 100

The lower limits shall apply at the transition frequencies.
4.2.1.3 Conformance tests
Conformance tests shall be carried out in accordance with clause 6.1.
4.2.2 Unwanted emissions within the band
4.2.2.1 Justification
Protection of the primary services operating in the 14,00 GHz to 14,25 GHz frequency band.
4.2.2.2 Specification
Specification 1: Carrier-on state
The EIRP spectral density of the unwanted emissions shall not exceed 4 - 10 log N dBW/100 kHz in the 14,00 GHz to
14,25 GHz band and outside the nominated bandwidth.
N is the maximum number of MES which are expected to transmit simultaneously on the same frequency. This number
shall not be exceeded for more than 0,01 % of the time. The value of N and the operational conditions of the system
shall be declared by the manufacturer.
Specification 2: Carrier-off state
The EIRP spectral density of any emission in the 14,00 GHz to 14,25 GHz band shall not exceed -21 dBW/100 kHz.
4.2.2.3 Conformance tests
Conformance tests shall be carried out in accordance with clause 6.2.
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13 ETSI EN 301 427 V1.2.1 (2001-11)
4.2.3 Off-axis EIRP emissions density in the nominated bandwidth
4.2.3.1 Justification
Protection of other satellite systems which use the same frequency band.
4.2.3.2 Specification
For directional antennas the maximum EIRP in any 40 kHz band from any MES in any direction φ degrees from the
antenna main beam axis shall not exceed the following limits within 3° of the geostationary orbit:
33 - 25 log (φ + δφ) - 10 log (K) dBW/40 kHz where 2,5° ≤ φ + δφ ≤ 7,0°;
+12 - 10 log (K) dBW/40 kHz where 7,0° < φ + δφ ≤ 9,2°;
36 - 25 log (φ + δφ) - 10 log (K) dBW/40 kHz where 9,2° < φ + δφ ≤ 48°;
-6 - 10 log (K) dBW/40 kHz where 48° < φ + δφ ≤ 180°;
where φ is the angle, in degrees, between the main beam axis and the direction considered. The value of δφ is equal to
either:
a) the rms antenna tracking accuracy; or
b) twice the static rms antenna pointing accuracy; whichever is the larger.
K is the power density ratio between the fully loaded system and a single MES measured in a 40 kHz bandwidth.
The value of K, all technical characteristics and the operational conditions declared by the manufacturer shall be entered
in the test report.
These limits apply over the range of latitudes and for the geostationary orbital arc declared by the manufacturer.
For non-directional antennas, the maximum EIRP per 40 kHz in any direction shall not exceed:
-6 - 10 log (K) dBW/40 kHz;
where K is as defined above.
4.2.3.3 Conformance tests
Conformance tests shall be carried out in accordance with clause 6.3.
4.2.4 Control and Monitoring Functions (CMF)
The following minimum set of CMF shall be implemented in MES in order to minimize the probability that they may
originate unwanted transmissions that may give rise to harmful interference to other systems.
Under any fault condition when the MES transmissions are being suppressed the limits for carrier-off state shall apply.
4.2.4.1 Processor monitoring
4.2.4.1.1 Justification
To ensure that the MES can suppress transmissions in the event of a processor sub-system failure.
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14 ETSI EN 301 427 V1.2.1 (2001-11)
4.2.4.1.2 Specification
The MES shall incorporate a processor monitoring function for each of its processors involved in the manipulation of
traffic and in control and monitoring functions.
The processor monitoring function shall detect any failure of the processor hardware and software.
No later than one second after any fault condition occurs, the MES shall enter the carrier-off state until the processor
monitoring function has determined that all fault conditions have been cleared.
4.2.4.1.3 Conformance tests
Conformance tests shall be carried out in accordance with clause 6.4.
4.2.4.2 Transmit subsystem monitoring
4.2.4.2.1 Justification
To ensure the correct operation of the transmit frequency generation sub-system, and to inhibit transmissions should the
sub-system fail.
4.2.4.2.2 Specification
The MES shall monitor the operation of its transmit frequency generation sub-system.
No later than 5 seconds after any fault condition of the transmit frequency generation sub-system occurs, the MES shall
enter the carrier-off state until the transmit sub-system monitoring function has determined that all fault conditions have
been cleared.
4.2.4.2.3 Conformance tests
Conformance tests shall be carried out in accordance with clause 6.4.
4.2.4.3 Power-on/Reset
4.2.4.3.1 Justification
To demonstrate that the MES achieves a controlled non-transmitting state following the powering of the unit or the
occurrence of a reset made by a local operator when this function is implemented.
4.2.4.3.2 Specification
During and following "power on" or a manual reset when this function is implemented, the MES shall remain in the
carrier-off state.
4.2.4.3.3 Conformance tests
Conformance tests shall be carried out in accordance with clause 6.4.
4.2.4.4 Control Channel (CC) reception
4.2.4.4.1 Justification
To ensure that the MES cannot transmit unless it correctly receives the CC messages from the NCF.
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15 ETSI EN 301 427 V1.2.1 (2001-11)
4.2.4.4.2 Specification
a) Without correct reception of the CC messages from the NCF, the MES shall remain in the carrier-off state.
b) The MES shall enter the carrier-off state immediately after a period not exceeding 30 seconds without correct
reception of the CC messages from the NCF.
4.2.4.4.3 Conformance tests
Conformance tests shall be carried out in accordance with clause 6.4.
4.2.4.5 Network control commands
4.2.4.5.1 Justification
These requirements ensure that the MES is capable of:
a) retaining a unique identification in the network and transmitting it upon reception of an appropriate request;
b) receiving commands from the NCF through its CC and executing those commands.
4.2.4.5.2 Specification
The MES shall hold, in non-volatile memory, its unique identification code in the network.
The MES shall be capable of receiving through its CC dedicated commands (addressed to the MES) from the NCF, and
which contain:
- transmission enable commands;
- transmission disable commands;
- identification request.
Once a transmission enable command is received the MES is authorized to transmit.
After power-on or reset the MES shall remain in the carrier-off state until it receives a transmission enable command.
For systems where no transmission enable command is expected after power-on or reset the MES may only transmit
initial bursts (see clause 4.2.4.6).
Once a transmission disable command is received, within 1 second the MES shall enter and shall remain in the
carrier-off state until the transmission disable com
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