SIST ETS 300 720:1999

SLOVENSKI STANDARD
SIST ETS 300 720:1999
01-julij-1999
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Radio Equipment and Systems (RES); Technical characteristics and methods of
measurement for UHF on-board communications systems and equipment
Ta slovenski standard je istoveten z: ETS 300 720 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 300 720:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 720:1999

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SIST ETS 300 720:1999
EUROPEAN ETS 300 720
TELECOMMUNICATION March 1997
STANDARD
Source: ETSI TC-RES Reference: DE/RES-01011
ICS: 33.020
Key words: Maritime, radio
Radio Equipment and Systems (RES);
Technical characteristics and methods of measurement for UHF
on-board communications systems and equipment
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
Tel.: +33 4 92 94 42 00 - Fax: +33 4 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 1997. All rights reserved.

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ETS 300 720: March 1997
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 Definitions, abbreviations and symbols.9
3.1 Definitions .9
3.2 Abbreviations .9
3.3 Symbols .9
4 General requirements .9
4.1 Construction.9
4.2 Frequencies .10
4.3 Controls.10
4.4 Switching time.10
4.5 Safety precautions .10
4.6 Class of emission and modulation characteristics.11
4.7 Battery.11
4.8 Loudspeaker and microphone .11
4.9 Labelling.11
4.10 Equipment documentation .11
5 Test conditions, power sources and ambient temperatures .11
5.1 Normal end extreme test conditions .11
5.2 Test power source .11
5.3 Normal test conditions .12
5.3.1 Normal temperature and humidity.12
5.3.2 Normal test voltage .12
5.4 Extreme test conditions .12
5.4.1 Extreme temperatures.12
5.4.1.1 Upper extreme temperature .12
5.4.1.2 Lower extreme temperature .12
5.4.2 Extreme test power supply values.12
5.4.2.1 Upper extreme test voltage .12
5.4.2.2 Lower extreme test voltage .12
5.5 Procedure for tests at extreme temperatures.12
6 General conditions of measurement .13
6.1 Test connections.13
6.2 Arrangements for test signals.13
6.2.1 Test signals applied to the transmitter input.13
6.2.2 Test signals applied to the antenna terminal.13
6.3 Receiver mute or squelch facility .13
6.4 Normal test modulation.13
6.5 Artificial antenna .14
6.6 Test channels .14
6.7 Measurement uncertainty and interpretation of the measuring results.14
6.7.1 Measurement uncertainty.14
6.7.2 Interpretation of the measurement results .14
7 Environmental tests.14
7.1 Procedure .14
7.2 Performance check.15
7.3 Drop test on to a hard surface .15
7.3.1 Definition .15
7.3.2 Method of measurement .15

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7.3.3 Requirement . 15
7.4 Temperature tests. 16
7.4.1 General . 16
7.4.2 Dry heat . 16
7.4.2.1 Method of measurement. 16
7.4.2.2 Requirement . 16
7.4.3 Damp heat . 16
7.4.3.1 Method of measurement. 16
7.4.3.2 Requirement . 16
8 Transmitter . 17
8.1 Frequency error. 17
8.1.1 Definition. 17
8.1.2 Method of measurement. 17
8.1.3 Limits . 17
8.2 Carrier power. 17
8.2.1 Definition. 17
8.2.2 Method of measurement. 17
8.2.3 Limit . 17
8.3 Frequency deviation . 17
8.3.1 Definition. 17
8.3.2 Maximum frequency deviation. 17
8.3.2.1 Method of measurement. 17
8.3.2.2 Limit. 17
8.3.3 Frequency deviation at modulation frequencies above 3 kHz . 18
8.3.3.1 Method of measurement. 18
8.3.3.2 Limits. 18
8.4 Limitation characteristics of the modulator. 18
8.4.1 Definition. 18
8.4.2 Method of measurement. 18
8.4.3 Limit . 18
8.5 Sensitivity of the modulator, including microphone . 19
8.5.1 Definition. 19
8.5.2 Method of measurement. 19
8.5.3 Limit . 19
8.6 Audio frequency response. 19
8.6.1 Definition. 19
8.6.2 Method of measurement. 19
8.6.3 Limit . 19
8.7 Audio frequency harmonic distortion of the emission. 20
8.7.1 Definition. 20
8.7.2 Method of measurement. 20
8.7.3 Limit . 21
8.8 Adjacent channel power. 21
8.8.1 Definition. 21
8.8.2 Method of measurement. 21
8.8.3 Limit . 21
8.9 Residual modulation of the transmitter. 21
8.9.1 Definition. 21
8.9.2 Method of measurement. 21
8.9.3 Limit . 21
8.10 Transient frequency behaviour of the transmitter. 22
8.10.1 Definition. 22
8.10.2 Method of measurement. 22
8.10.3 Limits . 23
8.11 Conducted spurious emissions conveyed to the antenna. 25
8.11.1 Definition. 25
8.11.2 Method of measurement. 25
8.11.3 Limit . 25
9 Receiver. 25
9.1 Harmonic distortion and rated audio frequency output power. 25
9.1.1 Definition. 25

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9.1.2 Methods of measurement .25
9.1.3 Limits.26
9.2 Audio frequency response .26
9.2.1 Definition .26
9.2.2 Method of measurement .26
9.2.3 Limits.26
9.3 Maximum usable sensitivity .27
9.3.1 Definition .27
9.3.2 Method of measurement .27
9.3.3 Limits.28
9.4 Co-channel rejection.28
9.4.1 Definition .28
9.4.2 Method of measurement .28
9.4.3 Limit.28
9.5 Adjacent channel selectivity.28
9.5.1 Definition .28
9.5.2 Method of measurement .28
9.5.3 Limits.29
9.6 Spurious response rejection .29
9.6.1 Definition .29
9.6.2 Method of measurement .29
9.6.3 Limit.29
9.7 Intermodulation response .29
9.7.1 Definition .29
9.7.2 Method of measurement .30
9.7.3 Limit.30
9.8 Blocking or desensitisation .30
9.8.1 Definition .30
9.8.2 Method of measurement .30
9.8.3 Limit.30
9.9 Conducted spurious emissions conveyed to the antenna .31
9.9.1 Definition .31
9.9.2 Method of measurement .31
9.9.3 Limit.31
Annex A (normative): Adjacent channel power measurement.32
A.1 Method of measurement .32
A.2 Power measuring receiver specification.32
A.2.1 IF filter.32
A.2.2 Attenuation indicator .34
A.2.3 RMS value indicator.34
A.2.4 Oscillator and amplifier .34
History.35

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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: 21 February 1997
Date of latest announcement of this ETS (doa): 30 June 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 December 1997
Date of withdrawal of any conflicting National Standard (dow): 31 December 1997

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1 Scope
This ETS states the minimum technical characteristics required for UHF radio equipment and systems
operating on frequencies allocated to the maritime mobile services by the ITU Radio Regulations,
appendix 20 [1].
2 Normative references
This ETS incorporates by dated or 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 references 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, appendix 20: "Characteristics of equipment used for on-
board communication in the bands between 450 and 470 MHz".
[2] ETR 028: "Radio Equipment and Systems (RES); Uncertainties in the
measurement of mobile radio equipment characteristics".
[3] Recommendation ITU-T P.53 (1988): "Psophometers (apparatus for the
objective measurement of circuit noise)".
[4] Recommendation ISO 694: "Positioning of magnetic compasses in ships".
3 Definitions, abbreviations and symbols
3.1 Definitions
For the purposes of this ETS, the following definition applies:
modulation index: The ratio between the frequency deviation and the modulation frequency.
3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
emf electro-motive force
ERP effective radiated power
RF radio frequency
SINAD signal + noise + distortion / noise + distortion
3.3 Symbols
For the purposes of this ETS, the following symbol applies:
-5
dBA acoustic level in dB relative to 2 × 10 Pa
4 General requirements
4.1 Construction
The mechanical and electrical construction and finish of the equipment shall conform in all respects to
good engineering practice and the equipment shall be suitable for use on board ships.
The equipment's colour shall be neither orange nor yellow.

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4.2 Frequencies
The equipment shall operate either on single-frequency or two-frequency simplex channels on those
frequencies specified in appendix 20 of the Radio Regulations [1].
Table 1: Single frequency simplex channels
Channel designator Frequency
Channel A 467,525 MHz
Channel B 467,550 MHz
Channel C 467,575 MHz
Channel D 457,525 MHz
Channel E 457,550 MHz
Channel F 457,575 MHz
Table 2: Two-frequency simplex channels for use with repeater only
Channel designator Transmit frequency Receive frequency
Channel G 467,525 MHz 457,525 MHz
Channel H 467,550 MHz 457,550 MHz
Channel J 467,575 MHz 457,575 MHz
Independent selection of transmitting and receiving frequencies shall not be possible.
The equipment shall be fitted with at least one single-frequency simplex channel, the frequency of which
shall be 457,525 MHz.
It shall not be possible to transmit during channel-switching operations.
4.3 Controls
The equipment shall have the following controls:
- a channel selector which shall indicate the designator of the channel to which the equipment is set;
- on/off switch for the equipment with visual indication that the equipment is switched on;
- a manual non-locking, push-to-talk switch to operate the transmitter;
- an audio-frequency power volume control.
The user shall not have access to any control which, if wrongly set, might impair the technical
characteristics of the equipment.
4.4 Switching time
The channel switching arrangements shall be such that the time necessary to change over from using one
of the channels to using any other channel does not exceed 5 seconds.
The time necessary to change over from transmission to reception and vice versa, shall not
exceed 0,3 seconds.
4.5 Safety precautions
Provision shall be made for protecting equipment from the effects of excessive current or voltage. Means
shall be incorporated to prevent reversal of polarity of the battery power supply.
Equipment with an antenna socket shall not be damaged by the effect of open-circuit or short-circuit of the
antenna socket for a period of at least 5 minutes.

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The manufacturer shall declare the compass safe distance according to Recommendation ISO 694 [4],
Method B.
4.6 Class of emission and modulation characteristics
The equipment shall use phase modulation, G3E (frequency modulation with a pre-emphasis of
6 dB/octave).
The equipment shall be designed to operate with a channel spacing of 25 kHz.
4.7 Battery
The battery may be an integral part of the equipment.
Primary and/or secondary batteries may be used.
Provisions shall be made for replacing the battery easily.
If the equipment is fitted with secondary batteries, a suitable battery charger shall be recommended by the
manufacturer.
4.8 Loudspeaker and microphone
The equipment shall be provided with a microphone and a loudspeaker which may be combined.
In the transmit condition the output of the receiver shall be muted.
4.9 Labelling
All controls shall be clearly labelled. The labelling shall include:
- the name of the manufacturer and his trade mark;
- the type number and serial number of the equipment; and
- the compass safe distance.
4.10 Equipment documentation
For the purpose of conformance testing in accordance with this ETS, adequate technical and operational
documentation shall be supplied with the equipment.
5 Test conditions, power sources and ambient temperatures
5.1 Normal end extreme test conditions
Tests shall be made under normal test conditions and also, where stated, under extreme test conditions.
5.2 Test power source
Unless otherwise stated, the battery of the equipment shall be replaced by 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 terminal of the equipment.
During testing, the power source voltage shall be maintained within a tolerance of ±3 % relative to the
voltage level at the beginning of each test.

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5.3 Normal test conditions
5.3.1 Normal temperature and humidity
The normal temperature and humidity conditions for tests shall be a combination of temperature and
humidity within the following limits:
- temperature: +15 °C to +35 °C;
- relative humidity: 20 % to 75 %.
5.3.2 Normal test voltage
The normal test voltage shall be the nominal voltage of the battery as declared by the manufacturer.
5.4 Extreme test conditions
5.4.1 Extreme temperatures
5.4.1.1 Upper extreme temperature
Tests at the upper extreme temperature shall be made at +55 °C.
5.4.1.2 Lower extreme temperature
Tests at the lower extreme temperature shall be made at -20 °C.
5.4.2 Extreme test power supply values
5.4.2.1 Upper extreme test voltage
The upper extreme test voltage shall be declared by the manufacturer and shall not be lower than the
following:
- when using primary batteries, the voltage corresponding to the voltage that a fresh battery gives at
the upper extreme temperature when loaded with a load equal to that of the equipment in the muted
receive condition;
- when using secondary batteries, the voltage corresponding to the voltage that a fully charged
battery gives at the upper extreme temperature when loaded with a load equal to that of the
equipment in the muted receive condition.
5.4.2.2 Lower extreme test voltage
The lower extreme test voltage shall be declared by the manufacturer and shall not be higher than the
following:
- when using primary batteries, 0,85 times the voltage that a fresh battery gives at the lower extreme
temperature whe
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