SIST EN 301 025-2 V1.2.1:2005

• Abstract:

  Develop a harmonised standard under the R&TTE Directive identifying requirements in EN 301 025. Revision required following IEC 62238 changes.

• Status: Published
• Publication Date: 31-Jan-2005
• ICS: 33.060.99 - Other equipment for radiocommunications
• ICS: 33.100.01 - Electromagnetic compatibility in general
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Feb-2005
• Due Date: 01-Feb-2005
• Completion Date: 01-Feb-2005
• 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
• Mandate: M/284
• Ref Project: ETSI EN 301 025-2 V1.2.1 (2004-07) - 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

• Official Journal Project Relation: 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
• Effective Date: 24-Nov-2009

Overview

SIST EN 301 025-2 V1.2.1:2005 is a Slovenian standard harmonized with EN 301 025-2 and developed under the R&TTE Directive (1999/5/EC). It specifies requirements for electromagnetic compatibility (EMC) and radio spectrum usage for VHF radiotelephone equipment intended for general communications, including associated equipment supporting Class D Digital Selective Calling (DSC).

This standard ensures VHF maritime communications equipment operates efficiently within the 156-174 MHz frequency band, avoiding harmful interference and supporting the essential goals of safety and interoperability in the maritime environment.

Key Topics

• Electromagnetic Compatibility (EMC):

  • Defines limits for emissions and immunity to provide effective operation within maritime bands.
  • Covers spurious emissions, adjacent channel power and other parameters critical to spectrum management.

• Radio Spectrum Matters:

  • Addresses effective and interference-free use of the VHF maritime spectrum, as required by Article 3.2 of the R&TTE Directive.
  • Implements requirements to ensure coexistence with other radio equipment.

• Class D Digital Selective Calling (DSC):

  • Sets basic requirements for DSC functionality to support distress, urgency, and routine calling.
  • Class D is designed to provide a minimum subset of DSC facilities, building safety into maritime communications.

• Technical Specifications:

  • Defines transmitter and receiver performance criteria (e.g. frequency error, signal deviation).
  • Environmental profiles and test procedures included for product compliance.

Applications

This standard is essential for manufacturers, certification bodies, and users involved with VHF radios and maritime communication systems. Key applications include:

• VHF Radiotelephone Equipment:

  • Used on ships and coastal facilities for general marine communications, search and rescue operations, and safety alerts.
  • Ensures compatibility for routine traffic and emergency DSC messages.

• Maritime Safety Compliance:

  • Supports maritime safety requirements by ensuring reliable distress alerting and effective communication channels.
  • Facilitates compliance with European and IMO-related regulations for VHF radio installations.

• Equipment Certification and Market Access:

  • Manufacturers must demonstrate conformity to this harmonized standard to meet R&TTE Directive obligations and allow CE marking.
  • Provides test methods and specifications for product type approval and market entry within the European Economic Area.

Related Standards

Organizations implementing SIST EN 301 025-2 V1.2.1:2005 should also consider related standards and regulations, including:

• EN 301 025-1: Technical characteristics and methods of measurement for VHF radiotelephone and DSC equipment.
• EN 301 025-3: Harmonized EN for additional R&TTE Directive essential requirements.
• IEC 62238: International standard referenced for updates and alignment of requirements.
• EN 301 843: EMC standard for maritime radio communication equipment.
• Relevant ITU Recommendations: Such as ITU-R M.493 (DSC system for maritime mobile service) for additional DSC functionalities.
• Other EU Directives:
  • EMC Directive 89/336/EEC for additional electromagnetic compatibility requirements.
  • Low Voltage Directive (LVD) 73/23/EEC for electrical safety compliance.

Practical Value

Applying this standard helps:

• Ensure reliable, interference-free maritime communications.
• Promote harmonized product development and conformity assessment across Europe.
• Align with international maritime safety and equipment interoperability requirements.
• Simplify regulatory acceptance and market access for shipboard radio apparatus and related equipment.

By adhering to SIST EN 301 025-2 V1.2.1:2005, stakeholders support safer seas and more efficient maritime communications using standardized, high-quality VHF radiotelephone systems with integrated DSC capabilities.

SLOVENSKI STANDARD
01-februar-2005
(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 1.2.1
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.

ETSI EN 301 025-2 V1.2.1 (2004-09)
Candidate 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 V1.2.1 (2004-09)

Reference
REN/ERM-TG26-057-2
Keywords
maritime, radio, regulation, traffic, VHF
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
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 2004.
All rights reserved.
TM TM TM
DECT , PLUGTESTS and UMTS are Trade Marks of ETSI registered for the benefit of its Members.
TM
TIPHON and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI
3 ETSI EN 301 025-2 V1.2.1 (2004-09)
Contents
Intellectual Property Rights.6
Foreword.6
Introduction .7
1 Scope.9
2 References.9
3 Definitions, symbols and abbreviations .10
3.1 Definitions.10
3.2 Symbols.10
3.3 Abbreviations.10
4 Technical requirements specifications.10
4.1 Environmental profile.10
4.2 Conformance requirements.11
4.2.1 Transmitter frequency error .11
4.2.1.1 Definition.11
4.2.1.2 Limits.11
4.2.1.3 Conformance.11
4.2.2 Transmitter adjacent channel power .11
4.2.2.1 Definition.11
4.2.2.2 Limits.11
4.2.2.3 Conformance.11
4.2.3 Transmitter conducted spurious emissions conveyed to the antenna.11
4.2.3.1 Definition.11
4.2.3.2 Limit.11
4.2.3.3 Conformance.11
4.2.4 Transmitter cabinet radiation and conducted spurious emissions other than those conveyed to the
antenna.12
4.2.4.1 Definitions.12
4.2.4.2 Limits.12
4.2.4.3 Conformance.12
4.2.5 Transient frequency behaviour of the transmitter .12
4.2.5.1 Definitions.12
4.2.5.2 Limits.12
4.2.5.3 Conformance.13
4.2.6 Transmitter carrier power .13
4.2.6.1 Definition.13
4.2.6.2 Limit.13
4.2.6.2.1 Normal test conditions.13
4.2.6.2.2 Extreme test conditions .13
4.2.6.3 Conformance.13
4.2.7 Transmitter frequency deviation.13
4.2.7.1 Definition.13
4.2.7.2 Limits.13
4.2.7.2.1 Maximum permissible frequency deviation .13
4.2.7.2.2 Reduction of frequency deviation at modulation frequencies above 3 kHz .13
4.2.7.3 Conformance.14
4.2.8 DSC frequency error (demodulated DSC signal).14
4.2.8.1 Definition.14
4.2.8.2 Limit.14
4.2.8.3 Conformance.14
4.2.9 DSC modulation index.14
4.2.9.1 Definition.14
4.2.9.2 Limit.14
4.2.9.3 Conformance.15
ETSI
4 ETSI EN 301 025-2 V1.2.1 (2004-09)
4.2.10 DSC modulation rate.15
4.2.10.1 Definition.15
4.2.10.2 Limit.15
4.2.10.3 Conformance.15
4.2.11 Free channel transmission on DSC channel 70.15
4.2.11.1 Definition.15
4.2.11.2 Requirement.15
4.2.11.3 Conformance.15
4.2.12 DSC receiver adjacent channel selectivity.15
4.2.12.1 Definition.15
4.2.12.2 Limits.15
4.2.12.3 Conformance.15
4.2.13 DSC receiver intermodulation response .16
4.2.13.1 Definition.16
4.2.13.2 Limit.16
4.2.13.3 Conformance.16
4.2.14 Receiver spurious emissions at the antenna.16
4.2.14.1 Definition.16
4.2.14.2 Limit.16
4.2.14.3 Conformance.16
4.2.15 Receiver cabinet radiated spurious emissions.16
4.2.15.1 Definition.16
4.2.15.2 Limit.16
4.2.15.3 Conformance.16
4.2.16 DSC receiver maximum usable sensitivity .16
4.2.16.1 Definition.16
4.2.16.2 Limits.17
4.2.16.3 Conformance.17
4.2.17 DSC receiver co-channel rejection .17
4.2.17.1 Definition.17
4.2.17.2 Limits.17
4.2.17.3 Conformance.17
4.2.18 DSC receiver spurious response and blocking immunity .17
4.2.18.1 Definition.17
4.2.18.2 Limits.17
4.2.18.3 Conformance.17
5 Testing for compliance with technical requirements.17
5.1 Test conditions, power supply and ambient temperatures.17
5.1.1 Arrangements for test signals applied to the receiver input .17
5.1.2 Squelch.18
5.1.3 Transmission time limitation .18
5.1.4 Normal test modulation.18
5.1.5 Artificial antenna.18
5.1.6 Arrangements for test signals applied to the transmitter input.18
5.1.7 Test channels.18
5.1.8 Generation and examination of the digital selective call signal.18
5.1.9 Standard test signals for DSC .18
5.1.10 Determination of the symbol error ratio in the output of the receiving part .19
5.1.11 Test conditions, power sources, and ambient temperatures .19
5.1.11.1 Normal and extreme test conditions.19
5.1.11.2 Test power source .19
5.1.12 Normal test conditions .19
5.1.12.1 Normal temperature and humidity .19
5.1.12.2 Normal power sources.19
5.1.12.2.1 Battery power source.19
5.1.12.2.2 Other power sources .19
5.1.13 Extreme test conditions.19
5.1.13.1 Extreme temperatures.20
5.1.13.2 Extreme values of test power sources .20
5.1.13.2.1 Battery power source.20
5.1.13.2.2 Other power sources .20
ETSI
5 ETSI EN 301 025-2 V1.2.1 (2004-09)
5.1.14 Procedure for tests at extreme temperatures .20
5.2 Interpretation of the measurement results .20
5.3 Essential radio test suites.21
5.3.1 Transmitter frequency error .21
5.3.2 Transmitter adjacent channel power .21
5.3.3 Transmitter conducted spurious emissions conveyed to the antenna.22
5.3.4 Transmitter cabinet radiation and conducted spurious emissions other than those conveyed to the
antenna.22
5.3.5 Transient frequency behaviour of the transmitter .23
5.3.6 Transmitter carrier power .25
5.3.7 Transmitter frequency deviation.25
5.3.7.1 Maximum permissible frequency deviation .25
5.3.7.2 Reduction of frequency deviation at modulation frequencies above 3 kHz.25
5.3.8 DSC frequency error (demodulated DSC signal).25
5.3.9 DSC modulation index.26
5.3.10 DSC modulation rate.26
5.3.11 Free channel transmission on DSC channel 70.26
5.3.12 DSC receiver adjacent channel selectivity.26
5.3.13 DSC receiver intermodulation response .27
5.3.14 Receiver spurious emissions at the antenna.27
5.3.15 Receiver cabinet radiated spurious emissions.27
5.3.16 DSC receiver maximum usable sensitivity .28
5.3.17 DSC receiver co-channel rejection .28
5.3.18 DSC receiver spurious response and blocking immunity .29
Annex A (normative): The EN Requirements Table (EN-RT) .30
Annex B (normative): Measuring receiver for adjacent channel power measurement.32
B.1 Power measuring receiver specification.32
B.1.1 IF filter.32
B.1.2 Attenuation indicator.33
B.1.3 R.M.S. value indicator.33
B.1.4 Oscillator and amplifier.33
Annex C (normative): Radiated measurements .34
C.1 Test sites and general arrangements for measurements involving the use of radiated fields.34
C.1.1 Outdoor test site .34
C.1.2 Test antenna.34
C.1.3 Substitution antenna.35
C.1.4 Optional additional indoor site .35
C.2 Guidance on the use of radiation test sites .36
C.2.1 Measuring distance.36
C.2.2 Test antenna.36
C.2.3 Substitution antenna.36
C.2.4 Artificial antenna.37
C.2.5 Auxiliary cables.37
C.2.6 Acoustic measuring arrangement.37
C.3 Further optional alternative indoor test site using an anechoic chamber .37
C.3.1 Example of the construction of a shielded anechoic chamber.38
C.3.2 Influence of parasitic reflections in anechoic chambers.38
C.3.3 Calibration of the shielded anechoic chamber.39
Annex D (normative): DSC Calls .41
Annex E (informative): Bibliography.42
Annex F (informative): The EN title in the official languages .43
History .44

ETSI
6 ETSI EN 301 025-2 V1.2.1 (2004-09)
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 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 [5] (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: 10 September 2004
Date of latest announcement of this EN (doa): 31 December 2004
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 June 2005
Date of withdrawal of any conflicting National Standard (dow): 30 June 2006

ETSI
7 ETSI EN 301 025-2 V1.2.1 (2004-09)
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
Emergency*
3.3e
Fraud*
3.3d
3.3c
Privacy*
No harm to the network*
3.3b
* If needed
Scoped by
Inter-working via the network*
equipment
3.3a class or type
Inter-working with the network
Use of spectrum
3.2
New radio harmonised standards
Spectrum
Scoped by frequency and/or equipment type
Maritime Radio Product EMC
EN 301 843 a, single, multi-part
standard.
3.1b
EMC
Generic and product standards also notified under EMC Directive
New standards for human exposure to Electromagnetic Fields
and, if needed, new standards for acoustic safety
3.1a
Standards also notified under LV Directive
Safety
Non-radio Radio (RE)
TTE Non-TTE
Figure 1: Modular structure for the various standards used under the R&TTE Directive
ETSI
8 ETSI EN 301 025-2 V1.2.1 (2004-09)
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 the diagram shows EN 301 843, the multi-part product EMC standard for maritime radio, and the
existing collection of generic and product standards currently used under the EMC Directive [2].
For article 3.1a the diagram shows the existing safety standards currently used under the LV Directive [3] 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.
ETSI
9 ETSI EN 301 025-2 V1.2.1 (2004-09)
1 Scope
The present document applies to VHF radiotelephone equipment for general communications and associated equipment
for class "D" Digital Selective Calling (DSC).
This radio equipment operates within all or any part of the frequency band 156 MHz to 174 MHz allocated to the
Maritime Mobile Service and utilizes class of emission G3E, and possibly G2B.
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.
[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
(LV Directive).
[4] ETSI TR 100 028 (all parts): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics".
[5] 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.
[6] ITU-R Recommendation SM.332-4 (1978): "Selectivity of receivers".
[7] ITU-R Recommendation M.493-10 (2000): "Digital selective-calling system for use in the
maritime mobile service".
[8] ITU-R Recommendation M.821-1 (1997): "Optional expansion of the digital selective-calling
system for use in the maritime mobile service".
ETSI
10 ETSI EN 301 025-2 V1.2.1 (2004-09)
3 Definitions, symbols 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:
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
carrier frequency: frequency to which the transmitter or receiver is tuned
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
G3E: phase-modulation (frequency modulation with a pre-emphasis of 6 dB/octave) for speech
G2B: phase-modulation with digital information, with a sub-carrier for DSC operation
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 Symbols
For the purposes of the present document, the following symbols apply:
λ lambda (wavelength)
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
DSC Digital Selective Calling
e.m.f. electromotive force
EMC Electro-Magnetic Compatibility
IMO International Maritime Organization
LV Low Voltage
ppm parts per million
R&TTE Radio and Telecommunications Terminal Equipment
RE Radio Equipment
RF Radio Frequency
RMS Root Mean Square
VHF Very High Frequency
4 Technical requirements 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 determined by the environmental class of the equipment. The equipment shall comply with
all the technical requirements of the present document at all times when operating within the boundary limits of the
required operational environmental profile.
ETSI
11 ETSI EN 301 025-2 V1.2.1 (2004-09)
4.2 Conformance requirements
4.2.1 Transmitter frequency error
4.2.1.1 Definition
The frequency error is the difference between the measured carrier frequency and its nominal value.
4.2.1.2 Limits
The frequency error shall be within ±1,5 kHz.
4.2.1.3 Conformance
Conformance tests as defined in clause 5.3.1 shall be carried out.
4.2.2 Transmitter adjacent channel power
4.2.2.1 Definition
The adjacent channel power is that part of the total power output of a transmitter under defined conditions of
modulation which falls within a specified passband centred on the nominal frequency of either of the adjacent channels.
This power is the sum of the mean power produced by the modulation hum and noise of the transmitter.
4.2.2.2 Limits
The adjacent channel power shall not exceed a value of 70 dB below the carrier power of the transmitter without any
need to be below 0,2 µW.
4.2.2.3 Conformance
Conformance tests as defined in clause 5.3.2 shall be carried out.
4.2.3 Transmitter conducted spurious emissions conveyed to the antenna
4.2.3.1 Definition
Conducted spurious emissions are emissions on a frequency or frequencies which are outside the necessary bandwidth
and the level of which may be reduced without affecting the corresponding transmission of information. Spurious
emissions include harmonic emissions, parasitic emissions, intermodulation products and frequency conversion
products, but exclude out of band emissions.
4.2.3.2 Limit
The power of any conducted spurious emission on any discrete frequency shall not exceed 0,25 µW.
4.2.3.3 Conformance
Conformance tests as defined in clause 5.3.3 shall be carried out.
ETSI
12 ETSI EN 301 025-2 V1.2.1 (2004-09)
4.2.4 Transmitter cabinet radiation and conducted spurious emissions
other than those conveyed to the antenna
4.2.4.1 Definitions
Cabinet radiation consists of emissions at frequency, radiated by the equipment cabinet and structures.
Conducted spurious emissions other than those conveyed to the antenna are emissions at frequencies, other than those
of the carrier and the sideband components resulting from the wanted modulation process, which are produced by
conduction in the wiring and accessories used with the equipment.
4.2.4.2 Limits
When the transmitter is in stand-by the cabinet radiation and spurious emissions shall not exceed 2 nW.
When the transmitter is in operation the cabinet radiation and spurious emissions shall not exceed 0,25 µW.
4.2.4.3 Conformance
Conformance tests as defined in clause 5.3.4 shall be carried out.
4.2.5 Transient frequency behaviour of the transmitter
4.2.5.1 Definitions
The transient frequency behaviour of the transmitter is the variation in time of the transmitter frequency difference from
the nominal frequency of the transmitter when the RF output power is switched on and off.
t : according to the method of measurement described in clause 5.3.5 the switch-on instant t of a transmitter is
on on
defined by the condition when the output power, measured at the antenna terminal, exceeds 0,1 % of the
nominal power;
t : period of time starting at t and finishing according to table 1;
1 on
t : period of time starting at the end of t and finishing according to table 1;
2 1
t : switch-off instant defined by th
...