SIST ETS 300 441:1999

• Abstract:

  historical

• Status: Published
• Publication Date: 30-Jun-1999
• ICS: 33.060.99 - Other equipment for radiocommunications
• ICS: 47.020.70 - Navigation and control equipment
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jul-1999
• Due Date: 01-Jul-1999
• Completion Date: 01-Jul-1999
• Ref Project: ETSI ETS 300 441 ed.1 (1996-02) - 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

SIST ETS 300 441:1999 is a Slovenian standard identical to ETS 300 441 Edition 1 from ETSI. It specifies the technical characteristics and methods of measurement for maritime radiotelephone watch receivers for the international distress and calling frequency 2 182 kHz. It is aimed at shipboard receivers, including equipment installed below deck in accordance with IMO requirements.

What does SIST ETS 300 441:1999 specify?

SIST ETS 300 441:1999 sets minimum requirements and test methods for maritime radiotelephone watch receivers that monitor 2 182 kHz. The document combines product requirements with conformance test conditions so manufacturers, test labs, and purchasers can check both design and measured performance.

The document is organized into these main parts:

• Foreword
• 1 Scope
• 2 Normative references
• 3 Abbreviations and symbols
• 4 General requirements
• 5 Test conditions, power supplies and ambient temperatures
• 6 Environmental tests
• 7 Receiver
• 8 Muting device
• History

The scope says the standard covers maritime radiotelephone watch receivers, including power supply units or converters, intended for keeping watch on the international distress and calling frequency 2 182 kHz. It also states that the equipment is intended to cover shipboard installation below deck and includes relevant provisions from the Radio Regulations and IMO requirements.

What are the key requirements of SIST ETS 300 441:1999?

SIST ETS 300 441:1999 focuses on safe shipboard use, fixed-frequency operation, receiver performance, environmental endurance, and reliable muting behavior. In practice, this means the receiver must work as a dedicated distress-and-calling watch receiver, not as a general-purpose radio.

Construction, controls, labels and safety

Clause 4 requires the equipment to include a receiver, loudspeaker, and a filtering unit and/or muting device. The external controls are limited to specific functions such as on/off, volume, brightness reduction, muting, and silence-period controls. This matters because the operator should not face unnecessary controls on a safety-related receiver.

Clause 4 also requires clear labeling of controls, power-supply details, manufacturer identification, type designation, serial number, and compass safe distance. The compass safe distance is declared according to ISO Recommendation 694 Method B. For a buyer or installer, this supports correct shipboard placement and traceability.

Safety provisions cover transient voltage changes, reversed polarity, earthing of exposed metallic parts, antenna static protection, and access to voltages above 50 V. The receiver input also has to survive accidental high-voltage exposure and still return to normal operation after the test.

Tuning and reception capability

Clause 4.5 fixes the receiver to 2 182 kHz. Clause 4.6 requires reception of emission classes A2A, H2A, A3E and H3E. This means the equipment is intended for a single watch frequency and specific maritime telephony-related signal types.

Clause 4.7 requires the equipment to meet the standard one minute after switch-on. For service use, this matters because the receiver must be ready quickly after power-up.

Test conditions and measurement practice

Clause 5 sets normal and extreme test conditions, including temperature, humidity, and power-source values. The standard uses normal conditions of +15 °C to +35 °C and 20 % to 75 % relative humidity, and extreme temperatures of -15 °C and +55 °C. It also defines how tests are run on mains, battery, and other power sources.

Clause 5.6 requires the use of an artificial antenna consisting of a 10 Ω resistance in series with 250 pF for conformance testing. Clause 5.7 explains how test signals are applied so the receiver sees the correct impedance. This is important because test results need to be repeatable across laboratories.

Clause 5.8 defines measurement uncertainty and how results are interpreted in test reports. The test report must include the uncertainty for each measured parameter, and the measured value is compared with the corresponding limit.

Environmental durability

Clause 6 requires environmental tests before the other conformance tests. The receiver is checked for continuous operation under vibration and damp heat representative of shipboard service.

The vibration test includes vertical and horizontal directions and a performance check during exposure. The damp heat test exposes the equipment to high temperature and humidity, then checks performance again. In practice, this helps verify that the receiver remains usable after environmental stress rather than only in a laboratory setting.

Receiver performance

Clause 7 sets the main electrical performance requirements. The receiver’s standard output power is 50 mW, and the manufacturer’s rated output power has to be at least 500 mW. The maximum usable sensitivity must be better than +20 dBμV emf, so weak distress or calling signals can be received with adequate audio output.

Clause 7 also sets the audio frequency pass band, adjacent signal selectivity, blocking, cross modulation, intermodulation, spurious response rejection ratio, harmonic distortion, conducted spurious emissions, automatic gain control (AGC), audio frequency gain control, and protection of input circuits. These tests show whether the receiver can separate the wanted 2 182 kHz signal from nearby interference and still remain usable in a busy radio environment.

Muting device behavior

Clause 8 covers the optional muting device that silences the loudspeaker until defined signals are received. It addresses response to the radiotelephone alarm signal, navigational warning signal, and optionally the 1 300 Hz EPIRB signal. It also requires protection against unwanted signals such as selective calling signals, speech modulation, and non-specific 2 200 Hz signals.

If the muting device is used, it must lift within a defined time and switch the receiver to full audio pass band until manually reset. This matters because the receiver must ignore routine traffic but respond promptly to distress-related alerts.

What terms does SIST ETS 300 441:1999 define?

• Automatic Gain Control (AGC) - A control that adjusts receiver gain automatically so the audio output stays usable over a wide range of signal levels.
• Emergency Position-Indicating Radio Beacon (EPIRB) - A distress beacon signal that the muting device may also be designed to recognize.
• Signal + Noise + Distortion/Noise (SND/N) - A receiver output ratio used in sensitivity and interference tests to judge audio quality under measured conditions.
• emf - Electromotive force, used here as the unit basis for receiver input signal levels.
• rms - Root mean square, used for voltage and distortion measurements.
• A2A, H2A, A3E, H3E - Emission classes the receiver must be capable of receiving, covering the specified telegraphy and telephony signal types.

Who uses SIST ETS 300 441:1999?

SIST ETS 300 441:1999 is used by maritime radio equipment manufacturers, test laboratories, certification bodies, ship equipment buyers, and marine maintenance teams. Designers use it to build a receiver that meets shipboard and distress-watch expectations. Test labs use it to run conformance measurements, including environmental and receiver-performance tests.

Quality managers and procurement teams use it to specify acceptance criteria for shipboard radiotelephone watch receivers. Installers and inspectors use it for labeling, compass-safe-distance, and power-supply checks. It is relevant in the maritime communications and navigation equipment sectors.

What changed in SIST ETS 300 441:1999 from the previous edition?

SIST ETS 300 441:1999 is identical to ETS 300 441 Edition 1.

Which standards are used with SIST ETS 300 441:1999?

• ITU Radio Regulations - Provide the regulatory background for distress and calling signals, including the EPIRB-related provisions used in Clause 8.
• International Convention for Safety of Life at Sea, as amended 1988 - Supplies the IMO-related shipboard requirements referenced in the scope.
• ISO Recommendation 694 Method B - Used to declare and mark the compass safe distance.
• ETR 028 - Used for the measurement uncertainty approach applied in Clause 5.8.
• ITU-R Recommendation 332-4 - Supports the intermodulation test by identifying input frequencies likely to cause unwanted intermodulation products.

What does the SIST ETS 300 441:1999 document contain?

The document contains detailed test setups for receiver sensitivity, adjacent channel selectivity, blocking, cross modulation, intermodulation, spurious response rejection, harmonic distortion, conducted spurious emissions, AGC, audio gain control, and input-circuit protection. It also gives the environmental procedures for vibration and damp heat, plus the performance check used after environmental exposure.

Table 1 sets the absolute measurement uncertainties used for test reporting, and Table 2 gives adjacent-channel selectivity limits. Clause 5 also describes the artificial antenna and the way test signals are connected so the receiver sees a defined impedance during measurements.

Clause 8 contains signal-specific muting tests, including radiotelephone alarm, navigational warning, and EPIRB-related behavior, together with unwanted-signal immunity tests. For engineers and labs, this is the part that turns the standard into a practical test plan for type approval, conformance testing, and verification of shipboard receiver behavior.

SLOVENSKI STANDARD
01-julij-1999
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SRPRUVNHUDGLRWHOHIRQVNHVWUHåQHVSUHMHPQLNH]DQHYDUQRVWLQNOLFQDIUHNYHQFL
N+]
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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 - [e-mail]
X.400: Internet:
Tel.: [phone] - Fax: [phone]
*
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 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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ETS 300 441: February 1996
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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ETS 300 441: February 1996
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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ETS 300 441: February 1996
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ETS 300 441: February 1996
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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ETS 300 441: February 1996
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ETS 300 441: February 1996
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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ETS 300 441: February 1996
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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ETS 300 441: February 1996
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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ETS 300 441: February 1996
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 pow
...