SIST ETS 300 441:1999

SLOVENSKI STANDARD
SIST ETS 300 441:1999
01-julij-1999
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Radio Equipment and Systems (RES); Technical characteristics and methods of
measurement for maritime radiotelephone watch receivers for the distress and calling
frequency 2 182 kHz
Ta slovenski standard je istoveten z: ETS 300 441 Edition 1
ICS:
33.060.99 Druga oprema za radijske Other equipment for
komunikacije radiocommunications
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
SIST ETS 300 441:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 441:1999

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SIST ETS 300 441:1999
EUROPEAN ETS 300 441
TELECOMMUNICATION February 1996
STANDARD
Source: ETSI TC-RES Reference: DE/RES-01-07
ICS: 33.060.20
Emergency, maritime, mobile, radio, receiver
Key words:
Radio Equipment and Systems (RES);
Technical characteristics and methods of measurement for
maritime radiotelephone watch receivers for the distress
and calling frequency 2 182 kHz
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - secretariat@etsi.fr
X.400: Internet:
Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16
*
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 1996. All rights reserved.

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ETS 300 441: February 1996
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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Contents
Foreword .7
1 Scope .9
2 Normative references.9
3 Abbreviations and symbols .9
3.1 Abbreviations .9
3.2 Symbols .9
4 General requirements .10
4.1 Construction.10
4.1.1 Equipment elements.10
4.1.2 Design .10
4.1.3 Inspection and maintenance .10
4.1.4 Illumination .10
4.1.5 Interfaces.10
4.2 Controls and indicators .10
4.2.1 General.10
4.2.2 Controls .10
4.2.3 Indicators.11
4.2.4 Misuse .11
4.3 Labels .11
4.3.1 Power supply.11
4.3.2 Identification .11
4.3.3 Compass safe distance.11
4.4 Safety precautions .11
4.4.1 Protection .11
4.4.2 Earthing .11
4.4.3 Antenna static protection.11
4.4.4 Access.11
4.5 Tuning.11
4.6 Classes of emission.12
4.7 Warming up period .12
4.8 Instructions.12
4.8.1 Repair instructions.12
4.8.2 Accessibility.12
5 Test conditions, power supplies and ambient temperatures.12
5.1 General .12
5.2 Test power source .12
5.3 Normal test conditions .12
5.3.1 Normal temperature and humidity.12
5.3.2 Normal test power source .13
5.3.2.1 Mains voltage and frequency.13
5.3.2.2 Secondary battery power sources .13
5.3.2.3 Other power sources .13
5.4 Extreme test conditions .13
5.4.1 Extreme temperatures.13
5.4.2 Extreme values of the test power source .13
5.4.2.1 Mains voltage and frequency.13
5.4.2.2 Secondary battery power sources .13
5.4.2.3 Other power sources .13
5.5 Procedures for tests at extreme temperatures .13
5.6 Artificial antenna .14
5.7 Test signals applied to the receiver input.14
5.8 Measurement uncertainty and interpretation of the measuring results.14

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ETS 300 441: February 1996
5.8.1 Measurement uncertainty . 14
5.8.2 Interpretation of the measurement results. 14
6 Environmental tests . 15
6.1 Introduction. 15
6.2 Procedure. 15
6.3 Performance check . 15
6.4 Vibration test . 15
6.4.1 Method of measurement. 15
6.4.2 Requirement . 16
6.5 Damp heat test. 16
6.5.1 General . 16
6.5.2 Method of measurement. 16
6.5.3 Requirement . 16
7 Receiver. 16
7.1 Audio frequency output power. 16
7.1.1 Definition. 16
7.1.2 Method of measurement. 16
7.1.3 Limit . 16
7.2 Maximum usable sensitivity. 17
7.2.1 Definition. 17
7.2.2 Method of measurement. 17
7.2.3 Limit . 17
7.3 Audio frequency pass band. 17
7.3.1 Definition. 17
7.3.2 Method of measurement. 17
7.3.3 Limits . 17
7.4 Adjacent signal selectivity . 17
7.4.1 Definition. 17
7.4.2 Method of measurement. 17
7.4.3 Limits . 18
7.5 Blocking. 18
7.5.1 Definition. 18
7.5.2 Method of measurement. 18
7.5.3 Limits . 18
7.6 Cross modulation . 18
7.6.1 Definition. 18
7.6.2 Method of measurement. 18
7.6.3 Limit . 19
7.7 Intermodulation. 19
7.7.1 Definition. 19
7.7.2 Method of measurement. 19
7.7.3 Limit . 19
7.8 Spurious response rejection ratio. 19
7.8.1 Definition. 19
7.8.2 Method of measurement. 19
7.8.3 Limit . 20
7.9 Harmonic distortion . 20
7.9.1 Definition. 20
7.9.2 Method of measurement. 20
7.9.3 Limit . 20
7.10 Conducted spurious emissions . 20
7.10.1 Definition. 20
7.10.2 Method of measurement. 20
7.10.3 Limits . 20
7.11 Automatic gain control. 20
7.11.1 Methods of measurement. 21
7.11.2 Limits . 21
7.12 Audio frequency gain controls. 21
7.12.1 Definition. 21
7.12.2 Method of measurement. 21
7.12.3 Limit . 21

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7.13 Protection of input circuits.21
7.13.1 Definition .21
7.13.2 Method of measurement .21
7.13.3 Limit.21
8 Muting device .22
8.1 General .22
8.2 Mute response .22
8.2.1 Methods of measurement .22
8.2.2 Response to the radiotelephone alarm signal.22
8.2.3 Response to the navigational warning signal .22
8.2.4 Response to the 1 300 Hz EPIRB signal.23
8.2.5 Limit.23
8.3 Protection against unwanted signals .23
8.3.1 Method of measurement .23
8.3.1.1 Selective calling signals on 2 170,5 kHz.23
8.3.1.2 Speech modulation.23
8.3.1.3 Non-specific 2 200 Hz signals .23
8.3.2 Limits.24
8.4 Operation during radiotelephone silence periods .24
8.5 Provisions for testing.24
History.25

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Foreword
This European Telecommunication Standard (ETS) has been produced by the Radio Equipment and
Systems (RES) Technical Committee of the European Telecommunications Standards Institute (ETSI).
Transposition dates
Date of adoption of this ETS: 23 February 1996
Date of latest announcement of this ETS (doa): 31 May 1996
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 November 1996
Date of withdrawal of any conflicting National Standard (dow): 30 November 1996

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1 Scope
This ETS states the minimum requirements for maritime radiotelephone watch receivers, including power
supply units or converters, intended for keeping watch on the international distress and calling frequency
2 182 kHz.
This ETS is intended to cover equipment installed below deck in accordance with the requirement of the
International Maritime Organization (IMO) [2].
This ETS includes the relevant provisions of the Radio Regulations [1] and of the International Maritime
Organization [2].
2 Normative references
This ETS incorporates by dated and undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] ITU Radio Regulations.
[2] International Convention for Safety of Life at Sea, as amended 1988.
[3] ISO Recommendation 694 Method B.
[4] ETR 028: "Radio Equipment and Systems (RES); Uncertainties in the
measurement of mobile radio equipment characteristics".
[5] ITU-R Recommendation 332-4: "Selectivity of receivers".
3 Abbreviations and symbols
3.1 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
AGC Automatic Gain Control
emf electromotive force
EPIRB Emergency Position-Indicating Radio Beacon
rms root mean square
IMO International Maritime Organization
SND/N Signal + Noise + Distortion/Noise
3.2 Symbols
For the purposes of this ETS, the following symbols apply:
A2A Double sideband, single channel containing quantized or digital information with
the use of a modulating sub-carrier, telegraphy.
H2A Single sideband with full carrier single channel containing quantized or digital
information with the use of a modulating sub-carrier, telegraphy.
A3E Double sideband, single channel containing analogue information, telephony.
H3E Single sideband, full carrier, single channel containing analogue information,
telephony.

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4 General requirements
4.1 Construction
4.1.1 Equipment elements
The equipment shall comprise the following elements:
- a receiver;
- a loudspeaker;
- a filtering unit and/or a muting device to silence the loudspeaker in the absence of any of the signals
stated in clause 8;
- optionally, a device may be provided for disconnecting the filter, muting device or both during the
periods of radiotelephone silence.
4.1.2 Design
In all respects the mechanical and electrical design, construction and finish of the equipment shall
conform with good engineering practice, and the equipment shall be suitable for use on board ships at
sea.
4.1.3 Inspection and maintenance
All parts of the equipment which are subject to inspection and maintenance adjustments shall be easily
accessible. Components shall be easily identifiable, either by markings within the equipment or with the
aid of the technical description.
The equipment shall be so designed that the main units can be replaced readily, without elaborate
recalibration or readjustment.
4.1.4 Illumination
Means shall be provided for reducing, to extinction, the output of any light source on the equipment.
4.1.5 Interfaces
Connection of, or failure within, any external circuits shall not degrade the performance of the equipment.
4.2 Controls and indicators
4.2.1 General
All controls, instruments, monitoring devices and input/output points shall be clearly labelled.
All controls shall be of sufficient size to enable the usual control functions to be easily performed.
4.2.2 Controls
Only the following controls shall be provided on the exterior of the equipment:
- on/off switch;
- volume control for adjusting the audio frequency power as described in subclause 7.1;
- control for reducing the brightness of light sources, as described in subclause 4.1.4;
- muting device control or controls where clause 8 applies;
- filter control where subclause 8.4 applies;

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ETS 300 441: February 1996
- control for disabling the automatic control as described in subclause 8.4;
- a manual switch to take the mute and/or filtering unit out of operation.
4.2.3 Indicators
The status of all the controls shall be clearly indicated.
4.2.4 Misuse
The equipment shall be so designed that the misuse of the controls shall not cause damage to the
equipment or injury to personnel.
4.3 Labels
4.3.1 Power supply
Details of the power supply from which the equipment is intended to operate shall be clearly indicated on
the equipment.
4.3.2 Identification
The equipment shall be clearly marked on the exterior with identification of the manufacturer, type
designation of the equipment and serial number.
4.3.3 Compass safe distance
The compass safe distance according to ISO Recommendation 694 Method B [3] shall be declared by the
manufacturer and marked on the equipment.
4.4 Safety precautions
4.4.1 Protection
Provisions shall be made for protecting the equipment from damage if the power supply is subjected to
transient voltage changes and from damage by accidental reversal of the polarity of the power supply.
4.4.2 Earthing
Means shall be provided for earthing exposed metallic parts of the equipment, but this shall not cause any
terminal of the source of energy to be earthed.
4.4.3 Antenna static protection
In order to provide protection against damage due to static voltage which may appear at the input of the
receiver, there shall be a dc path from the antenna terminal to the chassis not exceeding 100 kΩ.
4.4.4 Access
All parts and wiring in which the direct or alternating voltages or both combine to give a peak voltage
greater than 50 V, shall be protected against accidental access and shall be isolated automatically from all
sources of electrical energy when the protective covers are removed.
Alternatively, the equipment shall be so constructed that access to such voltages may only be gained after
having used a tool for this purpose, such as a spanner or a screwdriver, and warning labels shall be
prominently displayed both within the equipment and on the protective covers.
4.5 Tuning
The receiver shall be fixed tuned on the frequency 2 182 kHz.

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4.6 Classes of emission
The receiver shall be capable of receiving emissions of classes A2A, H2A, A3E and H3E.
4.7 Warming up period
The equipment shall meet the requirements of this ETS one minute after being switched on.
4.8 Instructions
Adequately detailed operation and maintenance instructions shall be provided with the equipment.
4.8.1 Repair instructions
If the equipment is so constructed that fault diagnosis and repair are practicable down to component level,
the instructions shall include full circuit diagrams, component layouts and component parts lists.
If the equipment contains modules in which fault diagnosis and repair down to component level is not
practicable, the instructions shall contain sufficient information to enable localisation and replacement of
the defective module(s). With regard to other modules and components in the equipment, the instructions
shall contain the information mentioned above.
4.8.2 Accessibility
All parts of the equipment which are subject to inspection and maintenance adjustments shall be easily
accessible. Components shall be easily identifiable either by markings within the equipment or with the aid
of technical description.
5 Test conditions, power supplies and ambient temperatures
5.1 General
Conformance testing shall be made under normal test conditions and also, where stated, under extreme
test conditions.
5.2 Test power source
During the conformance tests, the equipment shall be supplied from a test power source capable of
producing normal and extreme test voltages as specified in subclauses 5.3.2 and 5.4.2.
The voltage of the power source shall be measured at the input terminals of the equipment.
The test power source voltages shall be maintained within a tolerances of ± 3 % relative to the voltage at
the beginning of the test.
5.3 Normal test conditions
5.3.1 Normal temperature and humidity
The normal temperature and humidity conditions for tests shall be any combination of temperature and
humidity within the following ranges:
- temperature: + 15°C to + 35°C;
- relative humidity: 20 % to 75 %.

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5.3.2 Normal test power source
5.3.2.1 Mains voltage and frequency
The normal test voltage for equipment to be connected to the ac mains shall be the nominal ac mains
voltage. For the purpose of conformance testing, the nominal voltage shall be the declared voltage or any
of the declared voltages for which the equipment is designed.
The frequency of the test power source corresponding to the ac mains shall be 50 Hz ± 1 Hz.
5.3.2.2 Secondary battery power sources
When the equipment is designed for operation from a secondary battery power source, the normal test
voltage shall be the nominal voltage of the battery (12 V, 24 V etc.).
5.3.2.3 Other power sources
When the equipment is designed for operation from other power sources, the normal test voltage shall be
stated by the equipment manufacturer.
5.4 Extreme test conditions
5.4.1 Extreme temperatures
For tests at extreme temperatures, measurements shall be made in accordance with subclause 5.5 at
- 15°C (± 3°C) and at + 55°C (± 3°C).
5.4.2 Extreme values of the test power source
5.4.2.1 Mains voltage and frequency
The extreme test voltages for equipment to be connected to the ac mains shall be the nominal mains
...