ETSI ETS 300 441 ed.1 (1996-02)

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

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the

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.

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

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

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

8.3.1.2 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

This European Telecommunication Standard (ETS) has been produced by the Radio Equipment and

Systems (RES) Technical Committee of the European Telecommunications Standards Institute (ETSI).

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

This ETS is intended to cover equipment installed below deck in accordance with the requirement of the

This ETS includes the relevant provisions of the Radio Regulations [1] and of the International Maritime

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

A2A Double sideband, single channel containing quantized or digital information with

H2A Single sideband with full carrier single channel containing quantized or digital

H3E Single sideband, full carrier, single channel containing analogue information,

- a filtering unit and/or a muting device to silence the loudspeaker in the absence of any of the signals

- optionally, a device may be provided for disconnecting the filter, muting device or both during the

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

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

The equipment shall be so designed that the main units can be replaced readily, without elaborate

Means shall be provided for reducing, to extinction, the output of any light source on the equipment.

Connection of, or failure within, any external circuits shall not degrade the performance of the equipment.

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.

- 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;

The equipment shall be so designed that the misuse of the controls shall not cause damage to the

Details of the power supply from which the equipment is intended to operate shall be clearly indicated on

The equipment shall be clearly marked on the exterior with identification of the manufacturer, type

The compass safe distance according to ISO Recommendation 694 Method B [3] shall be declared by the

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.

Means shall be provided for earthing exposed metallic parts of the equipment, but this shall not cause any

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.

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

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

The receiver shall be capable of receiving emissions of classes A2A, H2A, A3E and H3E.

The equipment shall meet the requirements of this ETS one minute after being switched on.

Adequately detailed operation and maintenance instructions shall be provided with the equipment.

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

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

Conformance testing shall be made under normal test conditions and also, where stated, under extreme

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 normal temperature and humidity conditions for tests shall be any combination of temperature and

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

The frequency of the test power source corresponding to the ac mains shall be 50 Hz ± 1 Hz.

When the equipment is designed for operation from a secondary battery power source, the normal test

When the equipment is designed for operation from other power sources, the normal test voltage shall be

For tests at extreme temperatures, measurements shall be made in accordance with subclause 5.5 at

The extreme test voltages for equipment to be connected to the ac mains shall be the nominal mains