SIST EN 301 025-2 V1.3.1:2007
Electromagnetic compatibility and Radio spectrum Matters (ERM) - VHF radiotelephone equipment for general communications and associated equipment for Class D Digital Selective Calling (DSC) - Part 2: Harmonized EN under article 3.2 of the R&TTE Directive
- Abstract
The present document covers the minimum requirements for general communication for shipborne fixed installations using a VHF radiotelephone operating in certain frequency bands allocated to the maritime mobile service using both 25 kHz and 12,5 kHz channels with associated equipment for DSC - class D. The present document is intended to cover the provisions of Directive 1999/5/EC [1] (R&TTE Directive) 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.
- Status
- Published
- Publication Date
- 05-Nov-2007
- Technical Committee
- MOC - Mobile Communications
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 05-Nov-2007
- Due Date
- 10-Jan-2008
- Completion Date
- 06-Nov-2007
- Mandate
- M/284
SIST EN 301 025-2 V1.3.1:2007 is the Slovenian adoption of ETSI EN 301 025-2 V1.3.1, published by ETSI as a harmonized European standard. It covers VHF radiotelephone equipment for general communications and associated Class D Digital Selective Calling (DSC) equipment used on shipborne fixed installations.
SIST EN 301 025-2 V1.3.1:2007 specifies the minimum radio-performance requirements and the compliance tests used to support Article 3.2 of the R&TTE Directive, with a focus on effective use of the maritime spectrum and avoidance of harmful interference. It is aimed at manufacturers, suppliers, and test laboratories that need to verify conformity for this equipment.
What does SIST EN 301 025-2 V1.3.1:2007 specify?
SIST EN 301 025-2 V1.3.1:2007 applies to general communications on shipborne fixed installations using VHF radiotelephones in maritime mobile service bands, with both 25 kHz and 12,5 kHz channels, and with associated Class D DSC equipment. The scope is tied to the R&TTE Directive Article 3.2 requirement on effective spectrum use.
The document is organized as a short harmonized standard with:
- Clause 1 - Scope
- Clause 2 - References
- Clause 3 - Definitions and abbreviations
- Clause 4 - Technical requirements specifications
- Clause 5 - Testing for compliance with technical requirements
- Annex A - Normative HS Requirement and conformance Test specifications Table (HS-RTT)
- Annex B - Informative official-language titles
| Annex | What it covers |
|---|---|
| Annex A | The harmonized requirement-to-test cross reference table for presumption of conformity under Article 3.2 |
| Annex B | The EN title in the official languages |
What are the key requirements of SIST EN 301 025-2 V1.3.1:2007?
SIST EN 301 025-2 V1.3.1:2007 sets out the radio parameters that matter most for spectrum use and receiver performance, then links each one to a test method. In practice, the standard tells a supplier what must be measured, under what conditions, and where the limit comes from.
Environmental profile and test basis
Clause 4.1 requires testing within the declared operational environmental profile, at representative points and under enough environmental variation to give confidence of compliance. The clause also ties those conditions to EC decision 2004/71/EC. For a reader, this means the equipment is not assessed only at one ideal laboratory point - the tests are meant to reflect the conditions under which the equipment is expected to operate.
Transmitter performance
Clause 4.2 covers transmitter frequency error, adjacent channel power, conducted spurious emissions, cabinet radiation and other spurious emissions, transient frequency behaviour, carrier power, and frequency deviation. The limits are taken from EN 301 025-1, and the matching test methods are in clause 5.3. For practice, this is the core of proving that the transmitter stays on frequency, radiates the intended signal cleanly, and does not create avoidable interference.
DSC signalling performance
Clause 4.2 also covers DSC frequency error, DSC modulation index, and DSC modulation rate. These requirements are important because DSC is used for digital calling and safety-related communication, so the signalling has to be correctly formed and stable. The document cross-refers to EN 301 025-1 for the definitions, limits, and test methods.
Receiver performance
Clauses 4.2.11 to 4.2.18 specify receiver maximum usable sensitivity, co-channel rejection, adjacent channel selectivity, spurious response rejection, intermodulation response, blocking or desensitization, and spurious emissions at the antenna and cabinet radiated spurious emissions. These items determine how well the receiver can hear wanted signals while resisting interference from nearby or unwanted signals. For buyers and labs, they are the main indicators of how the equipment will behave in a crowded radio environment.
DSC receiver performance
Clauses 4.2.19 to 4.2.21 extend the receiver checks to the DSC receiver, including maximum usable sensitivity, co-channel rejection, and spurious response and blocking immunity. This matters because the DSC path must still work reliably when other signals are present. The standard again relies on EN 301 025-1 for the detailed definitions and limits.
Compliance testing and measurement uncertainty
Clause 5 gives the compliance test framework. Clause 5.2 requires the test report to include measurement uncertainty, and it states that the reported value is compared with the relevant limit when judging compliance. The clause also points to TR 100 028 for calculating measurement uncertainty. In practice, this is the part that matters when a lab prepares a formal report, because the uncertainty has to be documented and controlled.
Essential and other test suites
Clause 5.3 lists the essential radio test suites for transmitter and DSC transmitter functions, while clause 5.4 lists the other test suites for receiver and DSC receiver functions. Annex A makes that structure explicit by marking each requirement as unconditional and each test as essential or other. This distinction matters because the essential test suite is the core route for presumption of conformity, while the other test suite still supports compliance but allows more flexibility in how it is demonstrated.
What terms does SIST EN 301 025-2 V1.3.1:2007 define?
- Class D - Equipment intended to provide minimum facilities for VHF DSC distress, urgency, safety, routine calling, and reception.
- Environmental profile - The range of environmental conditions under which equipment must comply with this standard.
- Carrier frequency - The frequency to which the transmitter or receiver is tuned.
- Frequency deviation - The difference between the instantaneous frequency of the modulated RF signal and the carrier frequency.
- Digital Selective Calling (DSC) - The digital calling function used for maritime communication, including distress and routine calls.
- G2B - Phase-modulation with digital information, with a sub-carrier for DSC operation.
- G3E - Phase-modulation used for speech, described in the document as frequency modulation with 6 dB/octave pre-emphasis.
- Signal, Noise And Distortion (SINAD) - A measurement term used in the uncertainty table for receiver sensitivity-related testing.
Who uses SIST EN 301 025-2 V1.3.1:2007?
SIST EN 301 025-2 V1.3.1:2007 is used by manufacturers and suppliers of maritime VHF radiotelephone equipment, especially when the equipment includes Class D DSC functions. It is also used by compliance laboratories, certification teams, and quality managers who need to verify that a product meets the harmonized Article 3.2 requirements.
It is particularly relevant for shipborne fixed installations, product qualification, and preparation of technical construction files and test reports. If you are selecting equipment or reviewing a design, this is the part of the ETSI framework that tells you what radio-performance evidence you need.
What changed in SIST EN 301 025-2 V1.3.1:2007 from the previous edition?
SIST EN 301 025-2 V1.3.1:2007 is the February 2007 publication of ETSI EN 301 025-2 V1.3.1. The history lists earlier EN 301 025 publications, including V1.2.1 from September 2004 and earlier V1.1.1 editions from 1998 and 2000.
Which standards are used with SIST EN 301 025-2 V1.3.1:2007?
- ETSI EN 301 025-1 (V1.3.1) - Supplies the technical characteristics, definitions, limits, and measurement methods that this part references throughout clauses 4 and 5.
- ETSI TR 100 028 (all parts) (V1.4.1) - Provides the basis for calculating measurement uncertainties reported under clause 5.2.
- Directive 1999/5/EC (R&TTE Directive) - Sets the Article 3.2 essential requirement that this standard supports.
- Directive 98/34/EC - Is named in the foreword as the procedural basis for the standardization mandate.
- Decision 2004/71/EC - Defines environmental conditions for marine radio communication equipment and is referenced in clause 4.1.
- Directives 89/336/EEC and 73/23/EEC - Appear in the references list as related legislative references.
What does the SIST EN 301 025-2 V1.3.1:2007 document contain?
The document contains the harmonized requirements for transmitter, receiver, and DSC performance, plus the test links needed to check them. It does this mainly by cross-referencing EN 301 025-1 for the detailed definitions, limits, and measurement procedures.
Clause 5 is especially practical because it gives the compliance test structure and the way to interpret measured values, including the treatment of measurement uncertainty. Table 1 lists the maximum absolute measurement uncertainties for the key parameters used in testing. Annex A then condenses the whole standard into the HS-RTT table, which is the fastest way to see which requirements are essential and which test clauses support them. Annex B provides the title in multiple official languages for publication and identification purposes.
Relations
- Official Journal Project Relation
SIST EN 301 025-2 V1.2.1:2005 - Electromagnetic compatibility and Radio spectrum Matters (ERM); VHF radiotelephone equipment for general communications and associated equipment for Class D Digital Selective Calling (DSC); Part 2: Harmonized EN under article 3.2 of the R&TTE Directive - Effective Date
- 24-Nov-2009
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Frequently Asked Questions
SIST EN 301 025-2 V1.3.1:2007 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Electromagnetic compatibility and Radio spectrum Matters (ERM) - VHF radiotelephone equipment for general communications and associated equipment for Class D Digital Selective Calling (DSC) - Part 2: Harmonized EN under article 3.2 of the R&TTE Directive". This standard covers: The present document covers the minimum requirements for general communication for shipborne fixed installations using a VHF radiotelephone operating in certain frequency bands allocated to the maritime mobile service using both 25 kHz and 12,5 kHz channels with associated equipment for DSC - class D. The present document is intended to cover the provisions of Directive 1999/5/EC [1] (R&TTE Directive) 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.
The present document covers the minimum requirements for general communication for shipborne fixed installations using a VHF radiotelephone operating in certain frequency bands allocated to the maritime mobile service using both 25 kHz and 12,5 kHz channels with associated equipment for DSC - class D. The present document is intended to cover the provisions of Directive 1999/5/EC [1] (R&TTE Directive) 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.
SIST EN 301 025-2 V1.3.1:2007 is classified under the following ICS (International Classification for Standards) categories: 33.060.99 - Other equipment for radiocommunications; 33.100.01 - Electromagnetic compatibility in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 301 025-2 V1.3.1:2007 has the following relationships with other standards: It is inter standard links to SIST EN 301 025-2 V1.2.1:2005. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 301 025-2 V1.3.1:2007 is associated with the following European legislation: EU Directives/Regulations: 1999/5/EC; Standardization Mandates: M/284. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 301 025-2 V1.3.1:2007 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2007
(OHNWURPDJQHWQD]GUXåOMLYRVW (0& LQ]DGHYHY]YH]L]UDGLMVNLPVSHNWURP (50
5DGLRWHOHIRQVNDRSUHPD]DREPRþMH9+)]DVSORãQHNRPXQLNDFLMHLQSULSDGDMRþD
RSUHPD]DGLJLWDOQLVHOHNWLYQLNOLF '6& UD]UHGD'GHO +DUPRQL]LUDQL(1Y
VNODGXVþOHQRPGLUHNWLYH5 77(
Electromagnetic compatibility and Radio spectrum Matters (ERM) - VHF radiotelephone
equipment for general communications and associated equipment for Class D Digital
Selective Calling (DSC) - Part 2: Harmonized EN under article 3.2 of the R&TTE
Directive
Ta slovenski standard je istoveten z: EN 301 025-2 Version 1.3.1
ICS:
33.060.99 Druga oprema za radijske Other equipment for
komunikacije radiocommunications
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
Harmonized European Standard (Telecommunications series)
Electromagnetic compatibility
and Radio spectrum Matters (ERM);
VHF radiotelephone equipment for general communications
and associated equipment for Class "D"
Digital Selective Calling (DSC);
Part 2: Harmonized EN under article 3.2
of the R&TTE Directive
2 ETSI EN 301 025-2 V1.3.1 (2007-02)
Reference
REN/ERM-TG26-074-2
Keywords
maritime, radio, regulation, traffic, VHF
ETSI
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ETSI
3 ETSI EN 301 025-2 V1.3.1 (2007-02)
Contents
Intellectual Property Rights.6
Foreword.6
1 Scope.7
2 References.7
3 Definitions and abbreviations.8
3.1 Definitions.8
3.2 Abbreviations.8
4 Technical requirements specifications.8
4.1 Environmental profile.8
4.2 Conformance requirements.9
4.2.1 Transmitter frequency error .9
4.2.1.1 Definition.9
4.2.1.2 Limits.9
4.2.1.3 Conformance.9
4.2.2 Transmitter adjacent channel power .9
4.2.2.1 Definition.9
4.2.2.2 Limits.9
4.2.2.3 Conformance.9
4.2.3 Transmitter conducted spurious emissions conveyed to the antenna.9
4.2.3.1 Definition.9
4.2.3.2 Limit.9
4.2.3.3 Conformance.9
4.2.4 Transmitter cabinet radiation and conducted spurious emissions other than those conveyed to the
antenna.9
4.2.4.1 Definitions.9
4.2.4.2 Limits.10
4.2.4.3 Conformance.10
4.2.5 Transient frequency behaviour of the transmitter .10
4.2.5.1 Definitions.10
4.2.5.2 Limits.10
4.2.5.3 Conformance.10
4.2.6 Transmitter carrier power .10
4.2.6.1 Definition.10
4.2.6.2 Limit.10
4.2.6.3 Conformance.10
4.2.7 Transmitter frequency deviation.10
4.2.7.1 Definition.10
4.2.7.2 Limit.10
4.2.7.3 Conformance.10
4.2.8 DSC frequency error (demodulated DSC signal).10
4.2.8.1 Definition.10
4.2.8.2 Limit.11
4.2.8.3 Conformance.11
4.2.9 DSC modulation index.11
4.2.9.1 Definition.11
4.2.9.2 Limit.11
4.2.9.3 Conformance.11
4.2.10 DSC modulation rate.11
4.2.10.1 Definition.11
4.2.10.2 Limit.11
4.2.10.3 Conformance.11
4.2.11 Receiver maximum usable sensitivity .11
4.2.11.1 Definition.11
4.2.11.2 Limits.11
ETSI
4 ETSI EN 301 025-2 V1.3.1 (2007-02)
4.2.11.3 Conformance.11
4.2.12 Receiver co-channel rejection.11
4.2.12.1 Definition.11
4.2.12.2 Limit.12
4.2.12.3 Conformance.12
4.2.13 Receiver adjacent channel selectivity .12
4.2.13.1 Definition.12
4.2.13.2 Limits.12
4.2.13.3 Conformance.12
4.2.14 Receiver spurious response rejection.12
4.2.14.1 Definition.12
4.2.14.2 Limit.12
4.2.14.3 Conformance.12
4.2.15 Receiver intermodulation response.12
4.2.15.1 Definition.12
4.2.15.2 Limit.12
4.2.15.3 Conformance.12
4.2.16 Receiver blocking or desensitization .13
4.2.16.1 Definition.13
4.2.16.2 Limit.13
4.2.16.3 Conformance.13
4.2.17 Receiver spurious emissions at the antenna.13
4.2.17.1 Definition.13
4.2.17.2 Limit.13
4.2.17.3 Conformance.13
4.2.18 Receiver cabinet radiated spurious emissions.13
4.2.18.1 Definition.13
4.2.18.2 Limit.13
4.2.18.3 Conformance.13
4.2.19 DSC receiver maximum usable sensitivity .13
4.2.19.1 Definition.13
4.2.19.2 Limits.13
4.2.19.3 Conformance.14
4.2.20 DSC receiver co-channel rejection .14
4.2.20.1 Definition.14
4.2.20.2 Limits.14
4.2.20.3 Conformance.14
4.2.21 DSC receiver spurious response and blocking immunity .14
4.2.21.1 Definition.14
4.2.21.2 Limits.14
4.2.21.3 Conformance.14
5 Testing for compliance with technical requirements.14
5.1 Test conditions, power supply and ambient temperatures.14
5.2 Interpretation of the measurement results .14
5.3 Essential radio test suites.15
5.3.1 Transmitter frequency error .15
5.3.2 Transmitter adjacent channel power .15
5.3.3 Transmitter conducted spurious emissions conveyed to the antenna.15
5.3.4 Transmitter cabinet radiation and conducted spurious emissions other than those conveyed to the
antenna.15
5.3.5 Transient behaviour of the transmitter .15
5.3.6 Transmitter carrier power .15
5.3.7 Transmitter frequency deviation.16
5.3.8 DSC frequency error (demodulated DSC signal).16
5.3.9 DSC modulation index.16
5.3.10 DSC modulation rate.16
5.4 Other test suites.16
5.4.1 General.16
5.4.2 Receiver maximum usable sensitivity .16
5.4.3 Receiver co-channel rejection.16
5.4.4 Receiver adjacent channel selectivity .16
ETSI
5 ETSI EN 301 025-2 V1.3.1 (2007-02)
5.4.5 Receiver spurious response rejection.16
5.4.6 Receiver intermodulation response.16
5.4.7 Receiver blocking or desensitization .17
5.4.8 Receiver spurious emissions at the antenna.17
5.4.9 Receiver cabinet radiated spurious emissions.17
5.4.10 DSC receiver maximum usable sensitivity .17
5.4.11 DSC receiver co-channel rejection .17
5.4.12 DSC receiver spurious response and blocking immunity .17
Annex A (normative): HS Requirement and conformance Test specifications Table (HS-
RTT).18
Annex B (informative): The EN title in the official languages .21
History .23
ETSI
6 ETSI EN 301 025-2 V1.3.1 (2007-02)
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 Harmonized European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM).
The present document has been produced by ETSI in response to a mandate from the European Commission issued
under Council Directive 98/34/EC [6] (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 [1] 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").
The present document is part 2 of a multi-part deliverable covering the Electromagnetic compatibility and Radio
spectrum Matters (ERM); VHF radiotelephone equipment for general communications and associated equipment for
Class "D" Digital Selective Calling (DSC), as identified below:
Part 1: "Technical characteristics and methods of measurement";
Part 2: "Harmonized EN under article 3.2 of the R&TTE Directive".
Part 3: "Harmonized EN under article 3.3 (e) of the R&TTE Directive".
National transposition dates
Date of adoption of this EN: 19 January 2007
Date of latest announcement of this EN (doa): 30 April 2007
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 October 2007
Date of withdrawal of any conflicting National Standard (dow): 31 October 2008
ETSI
7 ETSI EN 301 025-2 V1.3.1 (2007-02)
1 Scope
The present document covers the minimum requirements for general communication for shipborne fixed installations using
a VHF radiotelephone operating in certain frequency bands allocated to the maritime mobile service using both 25 kHz
and 12,5 kHz channels with associated equipment for DSC - class D.
The present document is intended to cover the provisions of Directive 1999/5/EC [1] (R&TTE Directive) 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.
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.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
[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 (R&TTE Directive).
[2] Council Directive 89/336/EEC of 3 May 1989 on the approximation of the laws of the Member
States relating to electromagnetic compatibility (EMC Directive).
[3] Council Directive 73/23/EEC of 19 February 1973 on the harmonization of the laws of Member
States relating to electrical equipment designed for use within certain voltage limits (73/23/EEC)
(LV Directive).
[4] ETSI EN 301 025-1 (V1.3.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
VHF radiotelephone equipment for general communications and associated equipment for Class
"D" Digital Selective Calling (DSC); Part 1: Technical characteristics and methods of
measurement".
[5] ETSI TR 100 028 (all parts) (V1.4.1): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Uncertainties in the measurement of mobile radio equipment characteristics".
[6] Directive 98/34/EC of the European Parliament and of the Council of 22 June 1998 laying down a
procedure for the provision of information in the field of technical standards and regulations.
[7] EC decision 2004/71/EC of 4 September 2003 on essential requirements relating to marine radio
communication equipment which is intended to be used on non-SOLAS vessels and to participate
in the Global Maritime Distress and Safety System (GMDSS).
ETSI
8 ETSI EN 301 025-2 V1.3.1 (2007-02)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in the R&TTE Directive [1] and the following
apply:
carrier frequency: frequency to which the transmitter or receiver is tuned
class D: class D equipment is intended to provide minimum facilities for VHF DSC distress, urgency and safety as well as
routine calling and reception, not necessarily in full accordance with IMO GMDSS carriage requirements for VHF
installations
environmental profile: range of environmental conditions under which equipment within the scope of EN 301 025-2 is
required to comply with the provisions of EN 301 025-2
frequency deviation: difference between the instantaneous frequency of the modulated RF signal and the carrier frequency
G2B: phase-modulation with digital information, with a sub-carrier for DSC operation
G3E: phase-modulation (frequency modulation with a pre-emphasis of 6 dB/octave) for speech
modulation index: ratio between the frequency deviation and the frequency of the modulation signal
supplier: entity referred to in the R&TTE Directive [1] responsible for the placing on the market of an equipment
within the scope of the Directive
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
DSC Digital Selective Calling
EMC Electro-Magnetic Compatibility
GMDS Global Maritime Distress and
...