SIST EN 301 688 V1.2.1:2016
(Main)Electromagnetic compatibility and Radio spectrum Matters (ERM) - Technical characteristics and methods of measurement for fixed and portable VHF equipment operating on 121,5 MHz and 123,1 MHz
Electromagnetic compatibility and Radio spectrum Matters (ERM) - Technical characteristics and methods of measurement for fixed and portable VHF equipment operating on 121,5 MHz and 123,1 MHz
The present document specifies the minimum technical requirements for maritime two-way AM VHF radiotelephone
apparatus for communications between ships in distress and rescuing aircraft. The present document incorporates
relevant provisions of the ITU Radio Regulations [i.1], of IMO Resolutions A.694(17) [i.2] and MSC.80(70) [i.3] and
of annex 10 to the ICAO Convention [i.4].
The maritime VHF equipment described in the present document is intended for communications on the aeronautical
emergency frequencies 121,5 MHz and 123,1 MHz only.
The present document is applicable to portable and fixed installed equipment.
NOTE: This type of equipment is covered by the Maritime Equipment Directive [i.6] and its subsequent
revisions.
Elektromagnetna združljivost in zadeve v zvezi z radijskim spektrom (ERM) - Tehnične karakteristike in merilne metode za fiksne in prenosne radijske naprave, ki delujejo v frekvenčnih območjih 121,5 in 123,1 MHz
Ta dokument določa minimalne tehnične zahteve za dvosmerno AM VHF radiotelefonsko napravo za pomorsko komunikacijo med ladjo v težavah in reševalnim letalom. Dokument vsebuje ustrezne določbe Pravilnika o radiokomunikacijah ITU [i.1], Resolucije IMO A.694(17) [i.2] in Resolucije IMO MSC.80(70) [i.3] ter priloge 10 h Konvenciji ICAO [i.4].
Pomorska VHF oprema, opisana v tem dokumentu, je namenjena samo za komunikacijo na letalskih frekvencah za nujne primere 121,5 MHz in 123,1 MHz.
Ta dokument se uporablja za prenosno in nameščeno opremo.
OPOMBA: Ta vrsta opreme je zajeta v Direktivi o pomorski opremi [i.6] in naknadnih revizijah.
General Information
Buy Standard
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Electromagnetic compatibility and Radio spectrum Matters (ERM) - Technical characteristics and methods of measurement for fixed and portable VHF equipment operating on 121,5 MHz and 123,1 MHz33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general33.060.20Sprejemna in oddajna opremaReceiving and transmitting equipmentICS:Ta slovenski standard je istoveten z:EN 301 688 V1.2.1SIST EN 301 688 V1.2.1:2016en01-maj-2016SIST EN 301 688 V1.2.1:2016SLOVENSKI
STANDARD
SIST EN 301 688 V1.2.1:2016
ETSI EN 301 688 V1.2.1 (2016-03) Technical characteristics and methods of measurement for fixed and portable VHF equipment operating on 121,5 MHz and 123,1 MHz
EUROPEAN STANDARD SIST EN 301 688 V1.2.1:2016
ETSI ETSI EN 301 688 V1.2.1 (2016-03) 2
Reference REN/ERM-TG26-132 Keywords maritime, radio, SAR, VHF ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88
Important notice The present document can be downloaded from: http://www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the following services: https://portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2016. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. SIST EN 301 688 V1.2.1:2016
ETSI ETSI EN 301 688 V1.2.1 (2016-03) 3 Contents Intellectual Property Rights . 5 Foreword . 5 Modal verbs terminology . 5 1 Scope . 6 2 References . 6 2.1 Normative references . 6 2.2 Informative references . 6 3 Symbols and abbreviations . 7 3.1 Symbols . 7 3.2 Abbreviations . 7 4 General requirements . 7 4.1 Construction . 7 4.2 Controls . 7 4.3 Operating frequencies . 8 4.4 Labelling. 8 4.5 Power source . 8 5 Test conditions, power sources and ambient temperatures . 9 5.1 Determination of the lower extreme test voltage . 9 5.2 Normal and extreme test conditions . 9 5.3 Test power source . 9 5.4 Normal test conditions . 9 5.4.1 Normal temperature and humidity . 9 5.4.2 Normal power source . 9 5.5 Extreme test conditions . 9 5.5.1 Extreme temperatures . 9 5.5.1.1 Upper extreme temperature . 9 5.5.1.2 Lower extreme temperature . 10 5.5.2 Extreme test power supply values . 10 5.5.2.1 Upper extreme test voltage . 10 5.5.2.2 Lower extreme test voltage . 10 5.6 Procedure for tests at extreme temperatures . 10 6 General conditions of measurements . 10 6.1 Test connections . 10 6.2 Arrangements for test signals applied to receiver input . 11 6.3 Squelch . 11 6.4 Normal test modulation . 11 6.5 Artificial antenna . 11 6.6 Test frequencies . 11 6.7 Measurement uncertainty and interpretation of the measuring results . 11 6.7.1 Measurement uncertainty . 11 6.7.2 Interpretation of the measurement results . 11 7 Environmental tests . 12 7.1 Introduction . 12 7.2 Procedure . 12 7.3 Performance check . 12 7.4 Drop test on hard surface . 12 7.5 Vibration test . 12 7.6 Temperature tests . 12 7.6.1 General . 12 7.6.2 Dry heat cycle . 12 7.6.3 Damp heat cycle . 13 7.6.4 Low temperature cycle . 13 7.6.4.1 Method of measurement . 13 SIST EN 301 688 V1.2.1:2016
ETSI ETSI EN 301 688 V1.2.1 (2016-03) 4 7.7 Immersion test . 13 8 Transmitter . 13 8.1 Carrier power . 13 8.1.1 Definition . 13 8.1.2 Method of measurement . 13 8.1.3 Limit . 14 8.2 Frequency error . 14 8.2.1 Definition . 14 8.2.2 Method of measurement . 14 8.2.3 Limit . 14 8.3 Modulation of the transmitter . 14 8.3.1 Definition . 14 8.3.2 Method of measurement . 14 8.3.3 Limit . 14 8.4 Conducted spurious emissions conveyed to the antenna . 14 8.4.1 Definition . 14 8.4.2 Method of measurement . 14 8.4.3 Limit . 14 8.5 Cabinet radiation . 15 8.5.1 Definitions . 15 8.5.2 Method of measurement . 15 8.5.3 Limits . 16 9 Receiver . 16 9.1 Harmonic distortion and audio frequency output power . 16 9.1.1 Definition . 16 9.1.2 Method of measurement . 16 9.1.3 Limit . 16 9.2 Maximum usable sensitivity . 16 9.2.1 Definition . 16 9.2.2 Method of measurement . 16 9.2.3 Limit . 17 9.3 Spurious response rejection . 17 9.3.1 Definition . 17 9.3.2 Introduction to the method of measurement . 17 9.3.3 Method of search of the limited frequency range . 17 9.3.4 Method of measurement . 18 9.3.5 Limit . 18 9.4 Conducted spurious emissions . 18 9.4.1 Definition . 18 9.4.2 Method of measurement . 18 9.4.3 Limit . 18 History . 19
SIST EN 301 688 V1.2.1:2016
ETSI ETSI EN 301 688 V1.2.1 (2016-03) 5 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https://ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility and Radio spectrum Matters (ERM).
National transposition dates Date of adoption of this EN: 12 February 2016 Date of latest announcement of this EN (doa): 31 May 2016 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
30 November 2016 Date of withdrawal of any conflicting National Standard (dow): 30 November 2016
Modal verbs terminology In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and "cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). "must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation. SIST EN 301 688 V1.2.1:2016
ETSI ETSI EN 301 688 V1.2.1 (2016-03) 6 1 Scope The present document specifies the minimum technical requirements for maritime two-way AM VHF radiotelephone apparatus for communications between ships in distress and rescuing aircraft. The present document incorporates relevant provisions of the ITU Radio Regulations [i.1], of IMO Resolutions A.694(17) [i.2] and MSC.80(70) [i.3] and of annex 10 to the ICAO Convention [i.4]. The maritime VHF equipment described in the present document is intended for communications on the aeronautical emergency frequencies 121,5 MHz and 123,1 MHz only. The present document is applicable to portable and fixed installed equipment. NOTE: This type of equipment is covered by the Maritime Equipment Directive [i.6] and its subsequent revisions. 2 References 2.1 Normative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are necessary for the application of the present document. [1] ETSI EN 300 225: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Technical characteristics and methods of measurement for survival craft portable VHF radiotelephone apparatus". [2] ISO 25862:2009: "Ships and marine technology -- Marine magnetic compasses, binnacles and azimuth reading devices". [3] CENELEC EN 60945:2002: "Maritime navigation and radiocommunication equipment and systems - General requirements - Methods of testing and required test results". [4] ETSI TS 103 052 (V1.1.1) (03-2011): "Electromagnetic compatibility and Radio spectrum Matters (ERM); Radiated measurement methods and general arrangements for test sites up to 100 GHz". 2.2 Informative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. [i.1] ITU Radio Regulations 2012. [i.2] IMO Resolution A.694(17): "General Requirements for shipborne radio equipment forming part of the Global Maritime Distress and Safety System (GMDSS) and for electronic navigational aids". [i.3] IMO Resolution MSC.80(70): "Adoption of new Performance Standards for radiocommunication equipment". SIST EN 301 688 V1.2.1:2016
ETSI ETSI EN 301 688 V1.2.1 (2016-03) 7 [i.4] ICAO Convention on International Civil Aviation, annex 10. [i.5] ETSI TR 100 028: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Uncertainties in the measurement of mobile radio equipment characteristics". [i.6] Council Directive 96/98/EC of 20 December 1996 on marine equipment. 3 Symbols and abbreviations 3.1 Symbols For the purposes of the present document, the following symbols apply: A3E amplitude modulation with double sideband and full carrier dBA acoustic level in dB relative to 2 × 10-5 Pa dBd antenna gain in dB relative to dipole radiation 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: AM Amplitude Modulation emf electro-motive force ERP Effective Radiated Power EUT Equipment Under Test ICAO International Civil Aviation Organization IMO International Maritime Organization MSC Maritime Safety Committee pep peak envelope power RF Radio Frequency rms root mean square SINAD Signal + Noise + Distortion/Noise + Distortion VHF Very High Frequency 4 General requirements 4.1 Construction Portable equipment shall in one unit comprise at least transmitter, receiver, antenna, battery, operating controls including press-to-transmit switch, microphone and loudspeaker. Equipment intended for fixed installations shall have an 50 Ω RF socket. Portable equipment shall be of small size and light in weight. Portable equipment shall include provision for the connection of external microphone and headset. Portable equipment shall have a colour which distinguishes it from the portable VHF equipment specified in ETSI EN 300 225 [1]. The equipment shall be operational within 5 seconds of switching on. Fixed installation equipment shall be so installed that access for inspection or maintenance shall be available. 4.2 Controls The number of controls shall be the minimum necessary for simple operation.
The equipment shall be provided with an on-off switch and a visual indication that the equipment is switched on. The equipment shall be provided with a manual volume control by which the audio output may be varied. SIST EN 301 688 V1.2.1:2016
ETSI ETSI EN 301 688 V1.2.1 (2016-03) 8 The press-to-transmit switch shall be non-locking and return to standby (receive) mode when released. The time necessary to change from transmission to reception, or vice versa, shall not exceed 0,3 seconds. The equipment shall have a channel selector and shall clearly indicate which frequency the equipment is set to. The channel switching arrangement shall be such that the time necessary to change from one frequency to the other does not exceed 5 seconds. It shall not be possible to transmit during channel switching operations. Independent selection of transmitting and receiving frequencies shall not be possible. In the transmission mode, the output of the receiver shall be muted. 4.3 Operating frequencies The equipment shall be capable of operating on the single frequency channels 121,5 MHz and 123,1 MHz only (aeronautical emergency frequencies), with manual control (simplex). The equipment shall operate with class of emission A3E. 4.4 Labelling The labels on the equipment shall be permanently fixed to the exterior of the equipment. All controls and indicators shall be clearly labelled. The labelling shall at least comprise the following information: - text containing the words: "Only for emergency communications with aircraft"; - brief operating instructions; - type designation of the equipment and serial number; - expiry date for any primary batteries; - compass safe distance, according to ISO 25862 [2]. 4.5 Power source For portable equipment, the source of energy shall be a primary battery that may be replaceable by the user without the use of special tools and without degrading the performance of the equipment. In addition, provisions may be made to operate the equipment using an external source of electrical energy. Fixed radio installation should be powered from the ship's main source of electrical energy. In addition, it should be possible to operate the installation from an alternative source of electrical energy. Alternatively, the source of energy may be a primary battery integrated in the equipment and may be replaceable by the user. Primary batteries shall have a shelf life of at least 2 years. Provisions shall be made for protecting the equipment from damage due to accidental reversal of the polarity of the battery or of any external power supply. The capacity of the primary battery shall be sufficient to operate the equipment continuously for at least 8 hours at normal temperature condition (see clause 5.4.1) with the duty cycle defined in clause 5.1. SIST EN 301 688 V1.2.1:2016
ETSI ETSI EN 301 688 V1.2.1 (2016-03) 9 5 Test conditions, power sources and ambient temperatures 5.1 Determination of the lower extreme test voltage When determining the capacity of the primary battery, the battery voltage shall be measured at the end of a duration test. During this duration test, when activated, the transmitter should be modulated to give maximum output power (pep at 100 % modulation). The equipment shall be operated with the following duty cycle: - 6 seconds transmission without modulation followed by 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 (clause 6.4) with the audio volume control set to give minimum 200 mW output power followed by 48 seconds reception without input signal under muted condition (operational squelch condition). The lower extreme test voltage is the voltage of the battery at the end of this duration test measured with the transmitter activated. 5.2 Normal and extreme test conditions Testing of the equipment shall be made under normal test conditions and also, where stated, under extreme test conditions. 5.3 Test power source During testing, the equipment shall be supplied from a test power source capable of producing normal and extreme test voltages as specified in clauses 5.4.2 and 5.5.2. The tests power source shall only be used in measurements where its effect on the test results is negligible. 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. 5.4 Normal test conditions 5.4.1 Normal temperature and humidity The normal temperature and humidity conditions for tests shall be a combination
...
ETSI EN 301 688 V1.2.1 (2016-03)
EUROPEAN STANDARD
Technical characteristics and methods of measurement
for fixed and portable VHF equipment operating
on 121,5 MHz and 123,1 MHz
---------------------- Page: 1 ----------------------
2 ETSI EN 301 688 V1.2.1 (2016-03)
Reference
REN/ERM-TG26-132
Keywords
maritime, radio, SAR, VHF
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2016.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3 ETSI EN 301 688 V1.2.1 (2016-03)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Symbols and abbreviations . 7
3.1 Symbols . 7
3.2 Abbreviations . 7
4 General requirements . 7
4.1 Construction . 7
4.2 Controls . 7
4.3 Operating frequencies . 8
4.4 Labelling. 8
4.5 Power source . 8
5 Test conditions, power sources and ambient temperatures . 9
5.1 Determination of the lower extreme test voltage . 9
5.2 Normal and extreme test conditions . 9
5.3 Test power source . 9
5.4 Normal test conditions . 9
5.4.1 Normal temperature and humidity . 9
5.4.2 Normal power source . 9
5.5 Extreme test conditions . 9
5.5.1 Extreme temperatures . 9
5.5.1.1 Upper extreme temperature . 9
5.5.1.2 Lower extreme temperature . 10
5.5.2 Extreme test power supply values . 10
5.5.2.1 Upper extreme test voltage . 10
5.5.2.2 Lower extreme test voltage . 10
5.6 Procedure for tests at extreme temperatures . 10
6 General conditions of measurements . 10
6.1 Test connections . 10
6.2 Arrangements for test signals applied to receiver input . 11
6.3 Squelch . 11
6.4 Normal test modulation . 11
6.5 Artificial antenna . 11
6.6 Test frequencies . 11
6.7 Measurement uncertainty and interpretation of the measuring results . 11
6.7.1 Measurement uncertainty . 11
6.7.2 Interpretation of the measurement results . 11
7 Environmental tests . 12
7.1 Introduction . 12
7.2 Procedure . 12
7.3 Performance check . 12
7.4 Drop test on hard surface . 12
7.5 Vibration test . 12
7.6 Temperature tests . 12
7.6.1 General . 12
7.6.2 Dry heat cycle . 12
7.6.3 Damp heat cycle . 13
7.6.4 Low temperature cycle . 13
7.6.4.1 Method of measurement . 13
ETSI
---------------------- Page: 3 ----------------------
4 ETSI EN 301 688 V1.2.1 (2016-03)
7.7 Immersion test . 13
8 Transmitter . 13
8.1 Carrier power . 13
8.1.1 Definition . 13
8.1.2 Method of measurement . 13
8.1.3 Limit . 14
8.2 Frequency error . 14
8.2.1 Definition . 14
8.2.2 Method of measurement . 14
8.2.3 Limit . 14
8.3 Modulation of the transmitter . 14
8.3.1 Definition . 14
8.3.2 Method of measurement . 14
8.3.3 Limit . 14
8.4 Conducted spurious emissions conveyed to the antenna . 14
8.4.1 Definition . 14
8.4.2 Method of measurement . 14
8.4.3 Limit . 14
8.5 Cabinet radiation . 15
8.5.1 Definitions . 15
8.5.2 Method of measurement . 15
8.5.3 Limits . 16
9 Receiver . 16
9.1 Harmonic distortion and audio frequency output power . 16
9.1.1 Definition . 16
9.1.2 Method of measurement . 16
9.1.3 Limit . 16
9.2 Maximum usable sensitivity . 16
9.2.1 Definition . 16
9.2.2 Method of measurement . 16
9.2.3 Limit . 17
9.3 Spurious response rejection . 17
9.3.1 Definition . 17
9.3.2 Introduction to the method of measurement . 17
9.3.3 Method of search of the limited frequency range . 17
9.3.4 Method of measurement . 18
9.3.5 Limit . 18
9.4 Conducted spurious emissions . 18
9.4.1 Definition . 18
9.4.2 Method of measurement . 18
9.4.3 Limit . 18
History . 19
ETSI
---------------------- Page: 4 ----------------------
5 ETSI EN 301 688 V1.2.1 (2016-03)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility and
Radio spectrum Matters (ERM).
National transposition dates
Date of adoption of this EN: 12 February 2016
Date of latest announcement of this EN (doa): 31 May 2016
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 November 2016
Date of withdrawal of any conflicting National Standard (dow): 30 November 2016
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
---------------------- Page: 5 ----------------------
6 ETSI EN 301 688 V1.2.1 (2016-03)
1 Scope
The present document specifies the minimum technical requirements for maritime two-way AM VHF radiotelephone
apparatus for communications between ships in distress and rescuing aircraft. The present document incorporates
relevant provisions of the ITU Radio Regulations [i.1], of IMO Resolutions A.694(17) [i.2] and MSC.80(70) [i.3] and
of annex 10 to the ICAO Convention [i.4].
The maritime VHF equipment described in the present document is intended for communications on the aeronautical
emergency frequencies 121,5 MHz and 123,1 MHz only.
The present document is applicable to portable and fixed installed equipment.
NOTE: This type of equipment is covered by the Maritime Equipment Directive [i.6] and its subsequent
revisions.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI EN 300 225: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Technical
characteristics and methods of measurement for survival craft portable VHF radiotelephone
apparatus".
[2] ISO 25862:2009: "Ships and marine technology -- Marine magnetic compasses, binnacles and
azimuth reading devices".
[3] CENELEC EN 60945:2002: "Maritime navigation and radiocommunication equipment and
systems - General requirements - Methods of testing and required test results".
[4] ETSI TS 103 052 (V1.1.1) (03-2011): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Radiated measurement methods and general arrangements for test sites up to 100 GHz".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ITU Radio Regulations 2012.
[i.2] IMO Resolution A.694(17): "General Requirements for shipborne radio equipment forming part of
the Global Maritime Distress and Safety System (GMDSS) and for electronic navigational aids".
[i.3] IMO Resolution MSC.80(70): "Adoption of new Performance Standards for radiocommunication
equipment".
ETSI
---------------------- Page: 6 ----------------------
7 ETSI EN 301 688 V1.2.1 (2016-03)
[i.4] ICAO Convention on International Civil Aviation, annex 10.
[i.5] ETSI TR 100 028: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics".
[i.6] Council Directive 96/98/EC of 20 December 1996 on marine equipment.
3 Symbols and abbreviations
3.1 Symbols
For the purposes of the present document, the following symbols apply:
A3E amplitude modulation with double sideband and full carrier
-5
dBA acoustic level in dB relative to 2 × 10 Pa
dBd antenna gain in dB relative to dipole radiation
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AM Amplitude Modulation
emf electro-motive force
ERP Effective Radiated Power
EUT Equipment Under Test
ICAO International Civil Aviation Organization
IMO International Maritime Organization
MSC Maritime Safety Committee
pep peak envelope power
RF Radio Frequency
rms root mean square
SINAD Signal + Noise + Distortion/Noise + Distortion
VHF Very High Frequency
4 General requirements
4.1 Construction
Portable equipment shall in one unit comprise at least transmitter, receiver, antenna, battery, operating controls
including press-to-transmit switch, microphone and loudspeaker.
Equipment intended for fixed installations shall have an 50 Ω RF socket.
Portable equipment shall be of small size and light in weight.
Portable equipment shall include provision for the connection of external microphone and headset.
Portable equipment shall have a colour which distinguishes it from the portable VHF equipment specified in ETSI
EN 300 225 [1].
The equipment shall be operational within 5 seconds of switching on.
Fixed installation equipment shall be so installed that access for inspection or maintenance shall be available.
4.2 Controls
The number of controls shall be the minimum necessary for simple operation.
The equipment shall be provided with an on-off switch and a visual indication that the equipment is switched on.
The equipment shall be provided with a manual volume control by which the audio output may be varied.
ETSI
---------------------- Page: 7 ----------------------
8 ETSI EN 301 688 V1.2.1 (2016-03)
The press-to-transmit switch shall be non-locking and return to standby (receive) mode when released. The time
necessary to change from transmission to reception, or vice versa, shall not exceed 0,3 seconds.
The equipment shall have a channel selector and shall clearly indicate which frequency the equipment is set to. The
channel switching arrangement shall be such that the time necessary to change from one frequency to the other does not
exceed 5 seconds. It shall not be possible to transmit during channel switching operations. Independent selection of
transmitting and receiving frequencies shall not be possible. In the transmission mode, the output of the receiver shall
be muted.
4.3 Operating frequencies
The equipment shall be capable of operating on the single frequency channels 121,5 MHz and 123,1 MHz only
(aeronautical emergency frequencies), with manual control (simplex).
The equipment shall operate with class of emission A3E.
4.4 Labelling
The labels on the equipment shall be permanently fixed to the exterior of the equipment.
All controls and indicators shall be clearly labelled.
The labelling shall at least comprise the following information:
- text containing the words: "Only for emergency communications with aircraft";
- brief operating instructions;
- type designation of the equipment and serial number;
- expiry date for any primary batteries;
- compass safe distance, according to ISO 25862 [2].
4.5 Power source
For portable equipment, the source of energy shall be a primary battery that may be replaceable by the user without the
use of special tools and without degrading the performance of the equipment. In addition, provisions may be made to
operate the equipment using an external source of electrical energy.
Fixed radio installation should be powered from the ship's main source of electrical energy. In addition, it should be
possible to operate the installation from an alternative source of electrical energy. Alternatively, the source of energy
may be a primary battery integrated in the equipment and may be replaceable by the user.
Primary batteries shall have a shelf life of at least 2 years.
Provisions shall be made for protecting the equipment from damage due to accidental reversal of the polarity of the
battery or of any external power supply.
The capacity of the primary battery shall be sufficient to operate the equipment continuously for at least 8 hours at
normal temperature condition (see clause 5.4.1) with the duty cycle defined in clause 5.1.
ETSI
---------------------- Page: 8 ----------------------
9 ETSI EN 301 688 V1.2.1 (2016-03)
5 Test conditions, power sources and ambient
temperatures
5.1 Determination of the lower extreme test voltage
When determining the capacity of the primary battery, the battery voltage shall be measured at the end of a duration
test. During this duration test, when activated, the transmitter should be modulated to give maximum output power (pep
at 100 % modulation). The equipment shall be operated with the following duty cycle:
- 6 seconds transmission without modulation followed by 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 (clause 6.4) with the
audio volume control set to give minimum 200 mW output power followed by 48 seconds reception without
input signal under muted condition (operational squelch condition).
The lower extreme test voltage is the voltage of the battery at the end of this duration test measured with the transmitter
activated.
5.2 Normal and extreme test conditions
Testing of the equipment shall be made under normal test conditions and also, where stated, under extreme test
conditions.
5.3 Test power source
During testing, the equipment shall be supplied from a test power source capable of producing normal and extreme test
voltages as specified in clauses 5.4.2 and 5.5.2. The tests power source shall only be used in measurements where its
effect on the test results is negligible. 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.
5.4 Normal test conditions
5.4.1 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 +
...
Draft ETSI EN 301 688 V1.2.1 (2015-04)
EUROPEAN STANDARD
Electromagnetic compatibility
and Radio spectrum Matters (ERM);
Technical characteristics and methods of measurement
for fixed and portable VHF equipment operating
on 121,5 MHz and 123,1 MHz
---------------------- Page: 1 ----------------------
2 Draft ETSI EN 301 688 V1.2.1 (2015-04)
Reference
REN/ERM-TG26-132
Keywords
maritime, radio, SAR, VHF
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2015.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3 Draft ETSI EN 301 688 V1.2.1 (2015-04)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Symbols and abbreviations . 7
3.1 Symbols . 7
3.2 Abbreviations . 7
4 General requirements . 7
4.1 Construction . 7
4.2 Controls . 7
4.3 Operating frequencies . 8
4.4 Labelling. 8
4.5 Power source . 8
5 Test conditions, power sources and ambient temperatures . 8
5.1 Determination of the lower extreme test voltage . 8
5.2 Normal and extreme test conditions . 9
5.3 Test power source . 9
5.4 Normal test conditions . 9
5.4.1 Normal temperature and humidity . 9
5.4.2 Normal power source . 9
5.5 Extreme test conditions . 9
5.5.1 Extreme temperatures . 9
5.5.1.1 Upper extreme temperature . 9
5.5.1.2 Lower extreme temperature . 9
5.5.2 Extreme test power supply values . 9
5.5.2.1 Upper extreme test voltage . 9
5.5.2.2 Lower extreme test voltage . 10
5.6 Procedure for tests at extreme temperatures . 10
6 General conditions of measurements . 10
6.1 Test connections . 10
6.2 Arrangements for test signals applied to receiver input . 10
6.3 Squelch . 10
6.4 Normal test modulation . 11
6.5 Artificial antenna . 11
6.6 Test frequencies . 11
6.7 Measurement uncertainty and interpretation of the measuring results . 11
6.7.1 Measurement uncertainty . 11
6.7.2 Interpretation of the measurement results . 11
7 Environmental tests . 11
7.1 Introduction . 11
7.2 Procedure . 11
7.3 Performance check . 12
7.4 Drop test on hard surface . 12
7.5 Vibration test . 12
7.6 Temperature tests . 12
7.6.1 General . 12
7.6.2 Dry heat cycle . 12
7.6.3 Damp heat cycle . 12
7.7 Immersion test . 12
ETSI
---------------------- Page: 3 ----------------------
4 Draft ETSI EN 301 688 V1.2.1 (2015-04)
8 Transmitter . 13
8.1 Carrier power . 13
8.1.1 Definition . 13
8.1.2 Method of measurement . 13
8.1.3 Limit . 13
8.2 Frequency error . 13
8.2.1 Definition . 13
8.2.2 Method of measurement . 13
8.2.3 Limit . 13
8.3 Modulation of the transmitter . 13
8.3.1 Definition . 13
8.3.2 Method of measurement . 13
8.3.3 Limit . 13
8.4 Conducted spurious emissions conveyed to the antenna . 14
8.4.1 Definition . 14
8.4.2 Method of measurement . 14
8.4.3 Limit . 14
8.5 Cabinet radiation . 14
8.5.1 Definitions . 14
8.5.2 Method of measurement . 14
8.5.3 Limits . 15
9 Receiver . 15
9.1 Harmonic distortion and audio frequency output power . 15
9.1.1 Definition . 15
9.1.2 Method of measurement . 15
9.1.3 Limit . 15
9.2 Maximum usable sensitivity . 16
9.2.1 Definition . 16
9.2.2 Method of measurement . 16
9.2.3 Limit . 16
9.3 Spurious response rejection . 16
9.3.1 Definition . 16
9.3.2 Introduction to the method of measurement . 16
9.3.3 Method of search of the limited frequency range . 17
9.3.4 Method of measurement . 17
9.3.5 Limit . 17
9.4 Conducted spurious emissions . 17
9.4.1 Definition . 17
9.4.2 Method of measurement . 18
9.4.3 Limit . 18
History . 19
ETSI
---------------------- Page: 4 ----------------------
5 Draft ETSI EN 301 688 V1.2.1 (2015-04)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://ipr.etsi.org).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This draft European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility
and Radio spectrum Matters (ERM), and is now submitted for the combined Public Enquiry and Vote phase of the ETSI
standards EN Approval Procedure.
Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
---------------------- Page: 5 ----------------------
6 Draft ETSI EN 301 688 V1.2.1 (2015-04)
1 Scope
The present document specifies the minimum technical requirements for maritime two-way AM VHF radiotelephone
apparatus for communications between ships in distress and rescuing aircraft. The standard incorporates relevant
provisions of the ITU Radio Regulations [i.1], of IMO A.694 (17) [i.2] and MSC 80 (70) [i.3] and of Annex 10 to the
ICAO Convention [i.4].
The maritime VHF equipment described in the present document is intended for communications on the aeronautical
emergency frequencies 121,5 MHz and 123,1 MHz only.
The present document is applicable to portable and fixed installed equipment.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI EN 300 225: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Technical
characteristics and methods of measurement for survival craft portable VHF radiotelephone
apparatus".
[2] ISO 25862 (2009): "Ships and marine technology. Marine magnetic compasses, binnacles and
azimuth reading devices".
[3] CENELEC EN 60945 (2002): "Maritime navigation and radiocommunication equipment and
systems - General requirements - Methods of testing and required test results".
[4] ETSI TS 103 052 (V1.1.1) (03-2011): "Electromagnetic compatibility and Radio spectrum Matters
(ERM); Radiated measurement methods and general arrangements for test sites up to 100 GHz".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ITU Radio Regulations 2012.
[i.2] IMO Resolution A.694 (17): "General Requirements for shipborne radio equipment forming part
of the Global Maritime Distress and Safety System (GMDSS) and for electronic navigational
aids".
[i.3] IMO Resolution MSC.80(70): "Adoption of new Performance Standards for radiocommunication
equipment".
[i.4] ICAO Convention on International Civil Aviation, annex 10.
ETSI
---------------------- Page: 6 ----------------------
7 Draft ETSI EN 301 688 V1.2.1 (2015-04)
[i.5] ETSI TR 100 028: "Electromagnetic compatibility and Radio spectrum Matters (ERM);
Uncertainties in the measurement of mobile radio equipment characteristics".
3 Symbols and abbreviations
3.1 Symbols
For the purposes of the present document, the following symbols apply:
A3E amplitude modulation with double sideband and full carrier
-5
dBA acoustic level in dB relative to 2 × 10 Pa
dBd antenna gain in dB relative to dipole radiation
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AM Amplitude Modulation
emf electro-motive force
ERP Effective Radiated Power
EUT Equipment Under Test
ICAO International Civil Aviation Organisation
IMO International Maritime Organisation
MSC Maritime Safety Committee
pep peak envelope power
RF Radio Frequency
rms root mean square
SINAD Signal + Noise + Distortion/Noise + Distortion
VHF Very High Frequency
4 General requirements
4.1 Construction
Portable equipment shall in one unit comprise at least transmitter, receiver, antenna, battery, operating controls
including press-to-transmit switch, microphone and loudspeaker.
Equipment intended for fixed installations shall have an 50 Ω RF socket.
Portable equipment shall be of small size and light in weight.
Portable equipment shall include provision for the connection of external microphone and headset.
Portable equipment shall have a colour which distinguishes it from the portable VHF equipment specified in
ETSI EN 300 225 [1].
The equipment shall be operational within 5 seconds of switching on.
Fixed installation equipment shall be so installed that access for inspection or maintenance shall be available.
4.2 Controls
The number of controls shall be the minimum necessary for simple operation.
The equipment shall be provided with an on-off switch and a visual indication that the equipment is switched on.
The equipment shall be provided with a manual volume control by which the audio output may be varied.
The press-to-transmit switch shall be non-locking and return to standby (receive) mode when released. The time
necessary to change from transmission to reception, or vice versa, shall not exceed 0,3 seconds.
ETSI
---------------------- Page: 7 ----------------------
8 Draft ETSI EN 301 688 V1.2.1 (2015-04)
The equipment shall have a channel selector and shall clearly indicate which frequency the equipment is set to. The
channel switching arrangement shall be such that the time necessary to change from one frequency to the other does not
exceed 5 seconds. It shall not be possible to transmit during channel switching operations. Independent selection of
transmitting and receiving frequencies shall not be possible. In the transmission mode, the output of the receiver shall
be muted.
4.3 Operating frequencies
The equipment shall be capable of operating on the single frequency channels 121,5 MHz and 123,1 MHz only
(aeronautical emergency frequencies), with manual control (simplex).
The equipment shall operate with class of emission A3E.
4.4 Labelling
The labels on the equipment shall be permanently fixed to the exterior of the equipment.
All controls and indicators shall be clearly labelled.
The labelling shall at least comprise the following information:
- text containing the words: "Only for emergency communications with aircraft";
- brief operating instructions;
- type designation of the equipment and serial number;
- expiry date for any primary batteries;
- compass safe distance, according to ISO 25862 [2].
4.5 Power source
For portable equipment, the source of energy shall be a primary battery that may be replaceable by the user without the
use of special tools and without degrading the performance of the equipment. In addition, provisions may be made to
operate the equipment using an external source of electrical energy.
Fixed radio installation should be powered from the ship's main source of electrical energy. In addition, it should be
possible to operate the installation from an alternative source of electrical energy. Alternatively, the source of energy
may be a primary battery integrated in the equipment and may be replaceable by the user.
Primary batteries shall have a shelf life of at least 2 years.
Provisions shall be made for protecting the equipment from damage due to accidental reversal of the polarity of the
battery or of any external power supply.
The capacity of the primary battery shall be sufficient to operate the equipment continuously for at least 8 hours at
normal temperature condition (see clause 5.4.1) with the duty cycle defined in clause 5.1.
5 Test conditions, power sources and ambient
temperatures
5.1 Determination of the lower extreme test voltage
When determining the capacity of the primary battery, the battery voltage shall be measured at the end of a duration
test. During this duration test, when activated, the transmitter should be modulated to give maximum output power (pep
at 100 % modulation). The equipment shall be operated with the following duty cycle:
- 6 seconds transmission without modulation followed by 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 (clause 6.4) with the
audio volume control set to give minimum 200 mW output power followed by 48 seconds reception without
input signal under muted condition (operational squelch condition).
ETSI
---------------------- Page: 8 ----------------------
9 Draft ETSI EN 301 688 V1.2.1 (2015-04)
The lower extreme test voltage is the voltage of the battery at the end of this duration test measured with the transmitter
activated.
5.2 Normal and extreme test conditions
Testing of the equipment shall be made under normal test conditions and also, where stated, under extreme test
conditions.
5.3 Test power source
During testing, the equipment shall be supplied from a test power source capable of producing normal and extreme test
voltages as specified in clauses 5.4.2 and 5.5.2. The tests power source shall only be used in measurements where its
effect on the test results is negligible. 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.
5.4 Normal test conditions
5.4.1 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 %.
5.4.2 Normal power source
For portable equipment, the normal test voltage shall be the nominal voltage of the battery as declared by the
manufacturer.
For fixed installation equipment, the normal test voltage shall be that declared by the manufa
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.