ETSI I-ETS 300 225 ed.1 (1994-05)

SLOVENSKI STANDARD
01-december-2003
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Radio Equipment and Systems (RES); Technical characteristics and methods of
measurement for survival craft portable VHF radiotelephone apparatus
Ta slovenski standard je istoveten z: I-ETS 300 225 Edition 1
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
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.

INTERIM
EUROPEAN I-ETS 300 225
TELECOMMUNICATION May 1994
STANDARD
Source: ETSI TC-RES Reference: DI/RES-01-01
ICS: 33.060.50
Maritime, radiotelephone
Key words:
Radio Equipment and Systems (RES);
Technical characteristics and methods of
measurement for survival craft portable VHF
radiotelephone apparatus
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 1994. All rights reserved.
New presentation - see History box

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I-ETS 300 225: May 1994
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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I-ETS 300 225: May 1994
Contents
Foreword .7
1 Scope .9
2 Normative references.9
3 Abbreviations.9
4 General requirements .10
4.1 Construction.10
4.2 Frequencies and power .10
4.3 Controls.10
4.4 Switching time.11
4.5 Safety precautions .11
4.6 Class of emission and modulation characteristics.11
4.7 Battery.11
4.8 Labelling.12
5 Test conditions, power sources and ambient temperatures .12
5.1 Normal and extreme test conditions .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 power source .13
5.4 Extreme test conditions .13
5.4.1 Extreme temperatures.13
5.4.1.1 Upper extreme temperature .13
5.4.1.2 Lower extreme temperature .13
5.4.2 Extreme test power supply values.13
5.4.2.1 Upper extreme test voltage .13
5.4.2.2 Lower extreme test voltage .13
5.5 Procedure for tests at extreme temperatures.13
6 General conditions of measurement .13
6.1 Test connections.13
6.2 Arrangements for test signals applied to the receiver input.14
6.3 Receiver mute or squelch facility .14
6.4 Normal test modulation.14
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 .15
7 Environmental tests.15
7.1 Introduction .15
7.2 Procedure .15
7.3 Performance check.15
7.4 Drop test on hard surface .16
7.4.1 Definition .16
7.4.2 Method of measurement .16
7.4.3 Requirement.16
7.5 Vibration test.16
7.5.1 Method of measurement .16
7.5.2 Requirement.17
7.6 Temperature tests.17
7.6.1 General.17

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I-ETS 300 225: May 1994
7.6.2 Dry heat cycle . 17
7.6.2.1 Method of measurement. 17
7.6.2.2 Requirement . 17
7.6.3 Damp heat cycle . 17
7.6.3.1 Method of measurement. 17
7.6.3.2 Requirement . 18
7.6.4 Low temperature cycle. 18
7.6.4.1 Method of measurement. 18
7.6.4.2 Requirement . 18
7.7 Corrosion test (sea water test) . 18
7.7.1 General . 18
7.7.2 Method of measurement. 18
7.7.3 Requirements . 19
7.8 Immersion test. 19
7.8.1 Method of measurement. 19
7.8.2 Requirements . 19
7.9 Thermal shock. 20
7.9.1 Method of measurement. 20
7.9.2 Requirements . 20
7.10 Solar radiation . 20
7.10.1 Method of measurement. 20
7.10.2 Requirements . 20
7.11 Oil resistance test. 20
7.11.1 Method of measurement. 20
7.11.2 Requirement . 20
8 Field measurement. 21
8.1 Transmitter Effective Radiated Power (ERP). 21
8.1.1 Definition. 21
8.1.2 Method of measurement. 21
8.1.3 Limit . 21
8.2 Spurious emissions from the transmitter. 22
8.2.1 Definition. 22
8.2.2 Method of measurement. 22
8.2.3 Limit . 22
8.3 Spurious emissions from the receiver. 22
8.3.1 Definition. 22
8.3.2 Method of measurement. 22
8.3.3 Limit . 22
9 Transmitter . 22
9.1 Frequency error. 22
9.1.1 Definition. 22
9.1.2 Method of measurement. 23
9.1.3 Limit . 23
9.2 Carrier power referenced to ERP. 23
9.2.1 Definition. 23
9.2.2 Method of measurement. 23
9.2.3 Limits . 23
9.3 Frequency deviation .23
9.3.1 Definition. 23
9.3.2 Maximum permissible frequency deviation. 23
9.3.2.1 Method of measurement. 23
9.3.2.2 Limit. 24
9.3.3 Reduction of frequency deviation at modulation frequencies above 3 kHz . 24
9.3.3.1 Method of measurement. 24
9.3.3.2 Limits. 24
9.4 Limitation characteristics of the modulator. 24
9.4.1 Definition. 24
9.4.2 Method of measurement. 24
9.4.3 Limits . 25
9.5 Sensitivity of the modulator, including microphone . 25
9.5.1 Definition. 25

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I-ETS 300 225: May 1994
9.5.2 Method of measurement .25
9.5.3 Limit.25
9.6 Audio frequency response .25
9.6.1 Definition .25
9.6.2 Method of measurement .25
9.6.3 Limit.25
9.7 Audio frequency harmonic distortion of the emission .25
9.7.1 Definition .25
9.7.2 Method of measurement .25
9.7.2.1 Normal test conditions .25
9.7.2.2 Extreme test conditions .26
9.7.3 Limit.26
9.8 Adjacent channel power.26
9.8.1 Definition .26
9.8.2 Method of measurement .26
9.8.3 Limits.26
9.9 Residual modulation of the transmitter .26
9.9.1 Definition .26
9.9.2 Method of measurement .27
9.9.3 Limit.27
9.10 Transient frequency behaviour of the transmitter .27
9.10.1 Definitions.27
9.10.2 Method of measurement .27
9.10.3 Limits.29
10 Receiver .30
10.1 Harmonic distortion and rated audio frequency output power .30
10.1.1 Definition .30
10.1.2 Methods of measurement .30
10.1.3 Limits.30
10.2 Audio frequency response .30
10.2.1 Definition .30
10.2.2 Method of measurement .30
10.2.3 Limits.31
10.3 Maximum usable sensitivity .31
10.3.1 Definition .31
10.3.2 Method of measurement .31
10.3.3 Limits.31
10.4 Co-channel rejection.31
10.4.1 Definition .31
10.4.2 Method of measurement .31
10.4.3 Limit.32
10.5 Adjacent channel selectivity.32
10.5.1 Definition .32
10.5.2 Method of measurement .32
10.5.3 Limits.32
10.6 Spurious response rejection .32
10.6.1 Definition .32
10.6.2 Method of measurement .32
10.6.3 Limit.33
10.7 Intermodulation response .33
10.7.1 Definition .33
10.7.2 Method of measurement .33
10.7.3 Limit.33
10.8 Blocking or desensitisation .33
10.8.1 Definition .33
10.8.2 Method of measurement .33
10.8.3 Limit.34
10.9 Amplitude response of the receiver limiter.34
10.9.1 Definition .34
10.9.2 Method of measurement .34
10.9.3 Limit.34
10.10 Receiver noise .34

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I-ETS 300 225: May 1994
10.10.1 Definition. 34
10.10.2 Method of measurement. 34
10.10.3 Limit . 34
11 Secondary battery charger. 35
11.1 General. 35
11.2 Environmental tests. 35
11.2.1 Introduction . 35
11.2.2 Vibration test. 35
11.2.2.1 Method of measurement. 35
11.2.2.2 Requirement . 36
11.2.3 Temperature tests . 36
11.2.3.1 General . 36
11.2.3.2 Dry heat cycle. 36
11.2.3.3 Damp heat cycle . 36
11.2.3.4 Low temperature cycle. 36
11.2.4 Corrosion test . 37
11.2.4.1 General . 37
11.2.4.2 Method of measurement. 37
11.2.4.3 Requirements. 38
11.3 Charging time. 38
Annex A (normative): Measuring receiver for adjacent channel power measurement. 39
A.1 Power measuring receiver specification . 39
A.1.1 IF filter . 39
A 1.2 Attenuation indicator. 40
A.1.3 rms value indicator . 40
A.1.4 Oscillator and amplifier. 40
Annex B (normative): Solar radiation test source .41
B.1 Simulated solar radiation source . 41
History. 42

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I-ETS 300 225: May 1994
Foreword
This Interim European Telecommunication Standard (I-ETS) has been produced by the Radio Equipment
and Systems (RES) Technical Committee of the European Telecommunications Standards Institute
(ETSI).
This I-ETS defines the minimum technical characteristics required for portable VHF radio telephones
operating in survival craft, and optionally on board ships at sea, in certain frequency bands allocated to the
Maritime Mobile Service (MMS). It also incorporates the requirements detailed in the Radio Regulations,
SOLAS 1974 (as amended in 1988) [3] and the relevant recommendations of the International Maritime
Organization.
Every I-ETS prepared by ETSI is a voluntary standard. This I-ETS contains text concerning type approval
of the equipment to which it relates. This text does not make this I-ETS mandatory in its status as a
standard. However, this I-ETS can be referenced, wholly or in part, for mandatory application by decisions
of regulatory bodies.
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I-ETS 300 225: May 1994
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I-ETS 300 225: May 1994
1 Scope
This I-ETS states the minimum technical characteristics required for portable VHF radiotelephones
operating in the bands between 156 and 174 MHz allocated to the Maritime Mobile Services by the ITU
Radio Regulations (see Radio Regulations, Appendices 18 [1] and 19 [2]) and suitable for use in survival
craft and, optionally, on board ships at sea. The requirements detailed in the Radio Regulations, in
SOLAS 1974 [3], as amended 1988, and the International Maritime Organisation Resolutions A.694(17)
[5] and A.762(18) [4] are incorporated in this I-ETS.
2 Normative references
This I-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 publication apply to
this I-ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] International Radio Regulations, Appendix 18: "Table of Transmitting
Frequencies in the Band 156 - 174 MHz for Stations in the Maritime Mobile
Service".
[2] International Radio Regulations, Appendix 19: "Technical Characteristics for
Transmitters and Receivers used in the Maritime Mobile Service in the band 156
- 174 MHz".
[3] International Convention for the Safety of Life at Sea (SOLAS) 1974 as
amended.
[4] International Maritime Organization Resolution A.762(18): "Performance
standards for survival craft two way VHF radiotelephone apparatus".
[5] International Maritime Organization Resolution A.694(17): "General
requirements for ship-borne radio equipment forming part of the Global Maritime
Distress and Safety System (GMDSS)".
[6] ETR 028: "Radio Equipment and Systems; Uncertainties in the measurement of
mobile radio equipment characteristics".
[7] CCITT Recommendation P.53 (1988): "Psophometric apparatus for the
objective measurement of circuit noise".
[8] ETS 300 019: "Equipment Engineering (EE); Environmental conditions and
environmental tests for telecommunications equipment".
[9] ISO Recommendation 694, Method B.
3 Abbreviations
For the purposes of this I-ETS the following abbreviations apply.
DSC Digital Selective Calling
emf electro-motive force
ERP Effective Radiated Power
MMS Maritime Mobile Service
RF Radio Frequency
rms root mean square
SINAD (Signal + Noise + Distortion)/(Noise + Distortion) ratio
SOLAS Safety of Life at Sea
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I-ETS 300 225: May 1994
4 General requirements
4.1 Construction
The equipment shall be portable and capable of being used for on-scene communications between
survival craft, between survival craft and ship and between survival craft and rescue unit. It may also be
used for on-board communications when capable of operating on appropriate frequencies.
The equipment shall comprise at least:
- an integral transmitter/receiver including antenna and battery;
- an integral control unit including a press-to-transmit switch; and
- an internal microphone and loudspeaker.
The equipment shall be of either, highly visible yellow or orange colour, or marked with a surrounding
highly visible yellow or orange marking strip, which shall be visible also during charging and storage, as
applicable.
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 and survival craft at
sea.
All controls shall be of sufficient size to enable the usual control functions to be easily performed by a user
wearing gloves for immersion suits, in accordance with SOLAS 1974 Chapter III, Regulation 33 [3]. The
number of controls should be the minimum necessary for simple and satisfactory operation. With the
possible exception of channel selection, it shall be possible to operate the equipment using only one hand.
Any parts of the equipment required to be checked during inspection or maintenance operations as laid
down by the manufacturer, shall be readily accessible. Components shall be readily identifiable.
For the purpose of conformance testing in accordance with this I-ETS, adequate technical and operational
documentation shall be supplied with the equipment.
The equipment shall not be unduly affected by sea water, oil, or exposure to sunlight.
The equipment shall be of small size and light weight, (not more than 1,5 litres and 1,5 kg).
The manufacturer shall provide evidence on the method of attaching the equipment to the user's clothing,
including the immersion suit specified in SOLAS 1974 Chapter III Regulation 33 [3].
4.2 Frequencies and power
The equipment shall operate only on single-frequency channels for voice communications with manual
control (simplex).
The equipment shall provide for transmission and reception of signals on channel 16 and at least one
other single frequency channel from those specified in Appendix 18 of the Radio Regulations [1], (with the
exception of the DSC calling channel 70), (see also subclause 6.6).
Independent selection of transmitting and receiving frequencies shall not be possible.
After switch on the equipment shall be operational within 5 seconds, and meet the requirements of this I-
ETS within 1 minute.
It shall not be possible to transmit during channel switching operations.
4.3 Controls
The equipment shall have a channel selector and shall indicate the designator of the channel at which the
equipment is set, as given in Appendix 18 to the Radio Regulations [1].

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I-ETS 300 225: May 1994
It shall be possible to determine that channel 16 has been selected in all ambient light conditions.
The equipment shall have the following additional controls:
- on/off switch for the equipment with a visual indication that the equipment is switched on;
- a manual non-locking push to talk switch to operate the transmitter;
- a switch for reducing the power to not exceed 1 watt ERP; if the transmitter ERP is greater than 1
watt;
- an audio-frequency volume control;
- a squelch control;
- a carrier power detector giving a visual indication that the carrier is being produced.
The user shall not have access to any control which may impair the technical characteristics of the
equipment if wrongly set.
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
Means shall be incorporated to prevent damage to the equipment due to reversal of polarity of the battery
power supply.
The equipment shall be designed to be free of sharp projections which could damage survival craft.
The manufacturer shall declare the survival craft compass safe distance according to ISO
Recommendation 694 Method B [9].
The equipment shall not be damaged by the effects of an open circuit or a short circuit of the antenna.
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) for speech.
The equipment shall be designed to operate satisfactorily to the requirements of this I-ETS with a channel
separation of 25 kHz.
The frequency deviation corresponding to 100 % modulation shall approach ± 5 kHz as nearly as
practicable.
4.7 Battery
The source of power, (i.e. battery) shall be integrated in the equipment; and in addition, provision may be
made to operate the equipment using an external power source.
The capacity of the internal battery shall be sufficient to operate the equipment continuously for at least 8
hours at any temperature condition (see subclauses 5.3.1 and 5.4.1) with a 1:9 transmit to receive ratio at
its highest rated transmitter power.
This duty cycle is defined as:

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I-ETS 300 225: May 1994
- 6 seconds transmit at full RF output power without modulation, 6 seconds reception with an RF
input signal at the nominal frequency of the receiver at a level of + 60 dBμV using normal test
modulation (subclause 6.4); and
- the audio volume control of the receiver set at maximum followed by 48 seconds reception without
input signal and the squelch operational (muted).
Primary and/or secondary batteries may be used.
Provisions shall be made for replacing the battery easily without the use of special tools and without
degrading the performance of the equipment (particularly water tightness after re-assembly).
Primary batteries shall have a shelf life of at least 2 years.
If the equipment is fitted with secondary batteries, see Clause 11.
4.8 Labelling
All controls and indicators shall be clearly labelled.
The equipment shall be clearly labelled with brief instructions for operation.
The equipment shall be clearly marked on the exterior with identification of the manufacturer, type
designation, serial number, and the compass safe distance.
The type and designation of the battery used, and the expiry date of any primary battery shall be clearly
labelled.
5 Test conditions, power sources and ambient temperatures
5.1 Normal and extreme test conditions
Conformance testing shall be made under normal test conditions and also, where stated, under extreme
test conditions.
5.2 Test power source
During conformance testing, 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 tests power
source shall only be used in measurements where its effect on the test results shall be negligible. For the
purpose of testing the power source voltage shall be measured at the input terminals of the equipment.
During testing, the power source voltages shall be maintained within a tolerance of ± 3 % relative to the
voltage level at the beginning of each test.
The test power source shall only be used in measurements where the use of the test power source is
mutually agreed between manufacturer and test house. In the event of any discrepancy, results obtained
using the batteries shall take precedence over results obtained using the test power source.
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 %.

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I-ETS 300 225: May 1994
5.3.2 Normal power source
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
For tests at the upper extreme temperature, measurements shall be made at a temperature of + 55 °C.
5.4.1.2 Lower extreme temperature
For tests at the lower extreme temperature, measurements shall be made at a temperature of - 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 determined in each case and shall be the voltage corresponding
to the voltage that the battery gives at the upper extreme temperature at the beginning of the battery test
cycle, (see subclause 4.7), with a load equal to that of the equipment in the muted receive condition.
5.4.2.2 Lower extreme test voltage
The equipment fitted with an unused primary battery or fully charged secondary battery as appropriate,
shall be placed in a climatic chamber and cooled to - 20°C allowing a stabilization period of 2 hours.
The equipment shall be activated as described in subclause 4.7, for a period of 8 hours. After this period
the battery voltage shall be measured during equipment transmission. This voltage shall be taken as the
lower extreme test voltage, and shall be measured before disconnecting the load.
5.5 Procedure for tests at extreme temperatures
The equipment shall be switched off during the temperature-stabilising periods.
Before conducting tests at the upper temperature, the equipment shall be placed in the test chamber and
left until thermal equilibrium is reached. The equipment shall then be switched on for half an hour during
which the transmitter shall be keyed with a duty cycle of 5 minute transmission in the high power transmit
condition, and 5 minute reception. The equipment shall meet the requirements of this I-ETS after this
period.
For tests at the lower temperature, the equipment shall be left in the test chamber until thermal equilibrium
is reached and shall then be switched to the standby or receive position for one minute, after which the
equipment shall meet the requirements of this I-ETS.
6 General conditions of measurement
6.1 Test connections
For the purposes of conformance testing, the manufacturer and the test house shall agree on suitable
connections to test points within the equipment, which allow easy access to:
- the transmitter output (for 50 Ω connection);
- the receiver input (for 50 Ω connection);
- the transmitter audio input(s);
- the receiver audio output(s);

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I-ETS 300 225: May 1994
- the push-to-talk switch.
6.2 Arrangements for test signals applied to the receiver input
Test signal generators shall be connected to the receiver input in such a way that the impedance
presented to the receiver input is 50 Ω, irrespective of whether one or more test signals are applied to the
receiver simultaneously.
The levels of the test signals shall be expressed in terms of the emf at the terminals to be connected to
the receiver.
The effects of any intermodulation product and noise product in the test signal generators should be
negligible.
The nominal frequency of the receiver is the carrier frequency of the selected channel.
6.3 Receiver mute or squelch facility
Unless otherwise specified, the receiver squelch facility shall be made inoperative for the duration of the
conformance tests.
6.4 Normal test modulation
For normal test modulation, the modulation frequency shall be 1 kHz and the frequency deviation shall be
± 3 kHz.
6.5 Artificial antenna
When tests are conducted with an artificial antenna, this shall be a 50 Ω non-reactive, non-radiating load.
6.6 Test channels
Conformance testing shall be made on channel 16 (safety) unless otherwise stated. For the purpose of
field measurement conformance testing, the equipment shall also be capable of operating on channel 17.
6.7 Measurement uncertainty and interpretation of the measuring results
6.7.1 Measurement uncertainty
Absolute measurement uncertainties: maximum values
-7
RF frequency ± 1x10
RF power ± 0,75 dB
Maximum frequency deviation:
- within 300 Hz to 6 kHz of audio frequency ± 5 %
- within 6 kHz to 25 kHz of audio frequency ± 3 dB
Deviation limitation ± 5 %
Adjacent channel power ± 5 dB
Audio output power ± 0,5 dB
Amplitude characteristics of receiver limiter ± 1,5 dB
Sensitivity at 20 dB SINAD ± 3 dB

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I-ETS 300 225: May 1994
Two signal measurement ± 4 dB
Three signal measurement ± 3 dB
Radiated emission of transmitter ± 6 dB
Radiated emission of receiver ± 6 dB
Transmitter transient time ±  20 %
Transmitter transient frequency ± 2 50 Hz
For the test methods according to this I-ETS the uncertainty figures are valid to a confidence level of 95 %
calculated according to the methods described in ETR 028 [6].
6.7.2 Interpretation of the measurement results
The interpretation of the results recorded in a test report for the measurements described in this I-ETS
shall be as follows:
- the measured value related to the corresponding limit will be used to decide whether an equipment
meets the requirements of the I-ETS;
- the measurement uncertainty value for the measurement of each parameter shall be included in the
test report;
- the recorded value of the measurement uncertainty shall be, for each measurement, equal to or
lower than the maximum values given above.
NOTE: This procedure for using maximum acceptable uncertainty values is valid until
superseded by other a
...