Radiotelephone transmitters and receivers for the maritime mobile service operating in VHF bands - Technical characteristics and methods of measurement

The present document specifies the minimum requirements for shipborne radio transmitters and receivers for fixed
installations operating in the VHF frequency bands between 156 MHz and 174 MHz used by the maritime mobile
service, using both 25 kHz and 12,5 kHz channels and capable of Radiotelephony and Digital Selective Calling
communications within the Global Maritime Distress and Safety System. The present document incorporates the
requirements of the relevant resolutions of the International Maritime Organization (IMO) and is primarily intended to
specify equipment suitable for fitting to ships subject to the SOLAS Convention [i.2] and complying with the Council
Directive 2014/90/EU [i.3] of 23 July 2014 on marine equipment (the European Marine Equipment Directive).
The present document does not address the testing of ancillary equipment on a stand-alone basis, i.e. separately from the
radio equipment with which it is to be used.

Radiotelefonski oddajniki in sprejemniki za pomorske mobilne storitve, ki delujejo v pasovih VHF - Tehnične karakteristike in merilne metode

General Information

Status
Published
Public Enquiry End Date
28-Jun-2020
Publication Date
03-Jan-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
21-Dec-2020
Due Date
25-Feb-2021
Completion Date
04-Jan-2021

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Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 301 925 V1.6.1:2021
01-februar-2021

Radiotelefonski oddajniki in sprejemniki za pomorske mobilne storitve, ki delujejo

v pasovih VHF - Tehnične karakteristike in merilne metode

Radiotelephone transmitters and receivers for the maritime mobile service operating in

VHF bands - Technical characteristics and methods of measurement
Ta slovenski standard je istoveten z: ETSI EN 301 925 V1.6.1 (2020-12)
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
SIST EN 301 925 V1.6.1:2021 en

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

---------------------- Page: 1 ----------------------
SIST EN 301 925 V1.6.1:2021
---------------------- Page: 2 ----------------------
SIST EN 301 925 V1.6.1:2021
ETSI EN 301 925 V1.6.1 (2020-12)
EUROPEAN STANDARD
Radiotelephone transmitters and receivers for
the maritime mobile service operating in VHF bands;
Technical characteristics and methods of measurement
---------------------- Page: 3 ----------------------
SIST EN 301 925 V1.6.1:2021
2 ETSI EN 301 925 V1.6.1 (2020-12)
Reference
REN/ERM-TGMAR-607
Keywords
EMC, GMDSS, maritime, radio, telephony, 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 prevailing version of an ETSI

deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.

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.
© ETSI 2020.
All rights reserved.

DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and

of the 3GPP Organizational Partners.

oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and

of the oneM2M Partners.
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
---------------------- Page: 4 ----------------------
SIST EN 301 925 V1.6.1:2021
3 ETSI EN 301 925 V1.6.1 (2020-12)
Contents

Intellectual Property Rights ................................................................................................................................ 8

Foreword ............................................................................................................................................................. 8

Modal verbs terminology .................................................................................................................................... 8

1 Scope ........................................................................................................................................................ 9

2 References ................................................................................................................................................ 9

2.1 Normative references ......................................................................................................................................... 9

2.2 Informative references ...................................................................................................................................... 10

3 Definition of terms, symbols and abbreviations ..................................................................................... 11

3.1 Terms ................................................................................................................................................................ 11

3.2 Symbols ............................................................................................................................................................ 12

3.3 Abbreviations ................................................................................................................................................... 12

4 General requirements ............................................................................................................................. 13

4.1 Construction ..................................................................................................................................................... 13

4.2 DSC operation .................................................................................................................................................. 13

4.3 Controls and indicators ..................................................................................................................................... 14

4.4 Handset and loudspeaker .................................................................................................................................. 14

4.5 Safety precautions ............................................................................................................................................ 15

4.6 Labelling........................................................................................................................................................... 15

4.7 Warm up ........................................................................................................................................................... 15

4.8 Audio Processing .............................................................................................................................................. 15

5 Technical requirements .......................................................................................................................... 16

5.1 Switching time .................................................................................................................................................. 16

5.2 Class of emission and modulation characteristics ............................................................................................ 16

5.3 Multiple watch facilities ................................................................................................................................... 16

5.3.1 Additional performance standards .............................................................................................................. 16

5.3.2 Scanning characteristics .............................................................................................................................. 17

5.4 Interfaces .......................................................................................................................................................... 17

5.4.1 General ........................................................................................................................................................ 17

5.4.2 Audio frequency ......................................................................................................................................... 17

5.4.3 Digital interfaces ......................................................................................................................................... 17

5.5 Voyage data recorder interface ......................................................................................................................... 18

6 Test conditions, power sources and ambient temperatures .................................................................... 18

6.1 Test conditions ................................................................................................................................................. 18

6.2 Test power source ............................................................................................................................................. 18

6.3 Normal test conditions ...................................................................................................................................... 18

6.3.1 Normal temperature and humidity .............................................................................................................. 18

6.3.2 Normal power source voltage ..................................................................................................................... 18

6.3.2.1 Mains powered equipment .................................................................................................................... 18

6.3.2.2 Battery powered equipment .................................................................................................................. 19

6.3.2.3 Other power sources .............................................................................................................................. 19

6.4 Extreme test conditions .................................................................................................................................... 19

6.4.1 Extreme temperatures ................................................................................................................................. 19

6.4.2 Extreme values of power source voltage .................................................................................................... 19

6.4.2.1 Mains powered equipment .................................................................................................................... 19

6.4.2.2 Battery powered equipment .................................................................................................................. 19

6.4.2.3 Other power sources .............................................................................................................................. 19

6.5 Procedure for tests at extreme temperatures ..................................................................................................... 19

7 General conditions of measurement ....................................................................................................... 19

7.1 Sequence of testing ........................................................................................................................................... 19

7.2 Test channels .................................................................................................................................................... 20

7.3 Squelch ............................................................................................................................................................. 20

7.4 Arrangements for test signals applied to the receiver input .............................................................................. 20

ETSI
---------------------- Page: 5 ----------------------
SIST EN 301 925 V1.6.1:2021
4 ETSI EN 301 925 V1.6.1 (2020-12)

7.5 Normal test modulation of the receiver wanted signal ..................................................................................... 20

7.6 Arrangements for monitoring the receiver output ............................................................................................ 20

7.7 Arrangements for test signals applied to the transmitter input ......................................................................... 21

7.8 Normal test modulation of the transmitter ........................................................................................................ 21

7.9 Arrangements for monitoring the transmitter output ........................................................................................ 21

7.10 Arrangements for test of DSC .......................................................................................................................... 21

7.11 Standard test signals for DSC ........................................................................................................................... 21

7.12 Determination of symbol error ratio in the output of the receiver .................................................................... 21

7.13 Reference bandwidths for spurious measurements ........................................................................................... 22

7.14 Interpretation of the measurement results ........................................................................................................ 22

8 Performance checks ................................................................................................................................ 23

8.1 Performance checks - introduction ................................................................................................................... 23

8.2 Performance check - transmitter frequency error ............................................................................................. 23

8.3 Performance check - transmitter carrier power ................................................................................................ 23

8.4 Performance check - transmitter audio frequency harmonic distortion of the emission ................................... 23

8.5 Performance check - receiver sensitivity .......................................................................................................... 23

8.6 Performance check of DSC .............................................................................................................................. 23

9 Environmental tests ................................................................................................................................ 24

9.1 Procedure .......................................................................................................................................................... 24

9.2 Vibration test .................................................................................................................................................... 24

9.2.1 Definition .................................................................................................................................................... 24

9.2.2 Method of measurement ............................................................................................................................. 24

9.2.3 Requirement ................................................................................................................................................ 25

9.3 Temperature tests ............................................................................................................................................. 25

9.3.1 Introduction................................................................................................................................................. 25

9.3.2 General procedure ....................................................................................................................................... 25

9.3.3 Dry heat ...................................................................................................................................................... 25

9.3.3.1 Definition .............................................................................................................................................. 25

9.3.3.2 Method of measurement ........................................................................................................................ 25

9.3.3.3 Requirement .......................................................................................................................................... 25

9.3.4 Damp heat ................................................................................................................................................... 25

9.3.4.1 Definition .............................................................................................................................................. 25

9.3.4.2 Method of measurement ........................................................................................................................ 25

9.3.4.3 Requirement .......................................................................................................................................... 26

9.3.5 Low temperature cycle ................................................................................................................................ 26

9.3.5.1 Definition .............................................................................................................................................. 26

9.3.5.2 Method of measurement ........................................................................................................................ 26

9.3.5.3 Requirement .......................................................................................................................................... 26

10 Transmitter ............................................................................................................................................. 26

10.1 General conditions ............................................................................................................................................ 26

10.2 Frequency error ................................................................................................................................................ 26

10.2.1 Definition .................................................................................................................................................... 26

10.2.2 Method of measurement ............................................................................................................................. 26

10.2.3 Limits .......................................................................................................................................................... 27

10.3 Carrier power .................................................................................................................................................... 27

10.3.1 Definitions .................................................................................................................................................. 27

10.3.2 Method of measurement ............................................................................................................................. 27

10.3.3 Limits .......................................................................................................................................................... 27

10.3.3.1 General .................................................................................................................................................. 27

10.3.3.2 Normal test conditions limits ................................................................................................................ 27

10.3.3.3 Extreme test conditions limits ............................................................................................................... 27

10.4 Frequency deviation ......................................................................................................................................... 27

10.4.1 Definition .................................................................................................................................................... 27

10.4.2 Maximum permissible frequency deviation ................................................................................................ 28

10.4.2.1 Method of measurement ........................................................................................................................ 28

10.4.2.2 Limits .................................................................................................................................................... 28

10.4.3 Reduction of frequency deviation at modulation frequencies above 3 kHz ................................................ 28

10.4.3.1 Method of measurement ........................................................................................................................ 28

10.4.3.2 Limits .................................................................................................................................................... 28

10.5 Sensitivity of the modulator including the microphone ................................................................................... 29

ETSI
---------------------- Page: 6 ----------------------
SIST EN 301 925 V1.6.1:2021
5 ETSI EN 301 925 V1.6.1 (2020-12)

10.5.1 Definition .................................................................................................................................................... 29

10.5.2 Method of measurement ............................................................................................................................. 29

10.5.3 Limits .......................................................................................................................................................... 29

10.6 Audio frequency response ................................................................................................................................ 29

10.6.1 Definition .................................................................................................................................................... 29

10.6.2 Method of measurement ............................................................................................................................. 30

10.6.3 Limits .......................................................................................................................................................... 30

10.7 Audio frequency harmonic distortion of the emission...................................................................................... 30

10.7.1 Definition .................................................................................................................................................... 30

10.7.2 Method of measurement ............................................................................................................................. 31

10.7.3 Limits .......................................................................................................................................................... 31

10.8 Adjacent channel power ................................................................................................................................... 31

10.8.1 Definition .................................................................................................................................................... 31

10.8.2 Method of measurement ............................................................................................................................. 31

10.8.3 Limits .......................................................................................................................................................... 32

10.9 Conducted spurious emissions conveyed to the antenna .................................................................................. 32

10.9.1 Definition .................................................................................................................................................... 32

10.9.2 Method of measurement ............................................................................................................................. 32

10.9.3 Limit ........................................................................................................................................................... 32

10.10 Residual modulation of the transmitter ............................................................................................................ 32

10.10.1 Definition .................................................................................................................................................... 32

10.10.2 Method of measurement ............................................................................................................................. 32

10.10.3 Limit ........................................................................................................................................................... 33

10.11 Transient frequency behaviour of the transmitter ............................................................................................. 33

10.11.1 Definition .................................................................................................................................................... 33

10.11.2 Method of measurement ............................................................................................................................. 33

10.11.3 Limits .......................................................................................................................................................... 34

10.12 Radiated spurious emission .............................................................................................................................. 36

10.12.1 Definition .................................................................................................................................................... 36

10.12.2 Method of measurement ............................................................................................................................. 36

10.12.3 Limits .......................................................................................................................................................... 37

11 Transmitter with DSC encoder ............................................................................................................... 37

11.1 General ............................................................................................................................................................. 37

11.2 Frequency error (carrier) .................................................................................................................................. 37

11.2.1 Definition .................................................................................................................................................... 37

11.2.2 Method of measurement ............................................................................................................................. 37

11.2.3 Limits .......................................................................................................................................................... 38

11.3 Frequency error (demodulated signal) .............................................................................................................. 38

11.3.1 Definition .................................................................................................................................................... 38

11.3.2 Method of measurement ............................................................................................................................. 38

11.3.3 Limits .......................................................................................................................................................... 38

11.4 Carrier Power ................................................................................................................................................... 38

11.4.1 Definition .................................................................................................................................................... 38

11.4.2 Method of measurement ............................................................................................................................. 38

11.4.3 Limits .......................................................................................................................................................... 38

11.4.3.1 Normal test conditions .......................................................................................................................... 38

11.4.3.2 Extreme test conditions ......................................................................................................................... 39

11.5 Modulation index ............................................................................................................................................. 39

11.5.1 Definition .................................................................................................................................................... 39

11.5.2 Method of measurement .....................................................

...

ETSI EN 301 925 V1.6.1 (2020-12)
EUROPEAN STANDARD
Radiotelephone transmitters and receivers for
the maritime mobile service operating in VHF bands;
Technical characteristics and methods of measurement
---------------------- Page: 1 ----------------------
2 ETSI EN 301 925 V1.6.1 (2020-12)
Reference
REN/ERM-TGMAR-607
Keywords
EMC, GMDSS, maritime, radio, telephony, 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 prevailing version of an ETSI

deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.

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.
© ETSI 2020.
All rights reserved.

DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and

of the 3GPP Organizational Partners.

oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and

of the oneM2M Partners.
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3 ETSI EN 301 925 V1.6.1 (2020-12)
Contents

Intellectual Property Rights ................................................................................................................................ 8

Foreword ............................................................................................................................................................. 8

Modal verbs terminology .................................................................................................................................... 8

1 Scope ........................................................................................................................................................ 9

2 References ................................................................................................................................................ 9

2.1 Normative references ......................................................................................................................................... 9

2.2 Informative references ...................................................................................................................................... 10

3 Definition of terms, symbols and abbreviations ..................................................................................... 11

3.1 Terms ................................................................................................................................................................ 11

3.2 Symbols ............................................................................................................................................................ 12

3.3 Abbreviations ................................................................................................................................................... 12

4 General requirements ............................................................................................................................. 13

4.1 Construction ..................................................................................................................................................... 13

4.2 DSC operation .................................................................................................................................................. 13

4.3 Controls and indicators ..................................................................................................................................... 14

4.4 Handset and loudspeaker .................................................................................................................................. 14

4.5 Safety precautions ............................................................................................................................................ 15

4.6 Labelling........................................................................................................................................................... 15

4.7 Warm up ........................................................................................................................................................... 15

4.8 Audio Processing .............................................................................................................................................. 15

5 Technical requirements .......................................................................................................................... 16

5.1 Switching time .................................................................................................................................................. 16

5.2 Class of emission and modulation characteristics ............................................................................................ 16

5.3 Multiple watch facilities ................................................................................................................................... 16

5.3.1 Additional performance standards .............................................................................................................. 16

5.3.2 Scanning characteristics .............................................................................................................................. 17

5.4 Interfaces .......................................................................................................................................................... 17

5.4.1 General ........................................................................................................................................................ 17

5.4.2 Audio frequency ......................................................................................................................................... 17

5.4.3 Digital interfaces ......................................................................................................................................... 17

5.5 Voyage data recorder interface ......................................................................................................................... 18

6 Test conditions, power sources and ambient temperatures .................................................................... 18

6.1 Test conditions ................................................................................................................................................. 18

6.2 Test power source ............................................................................................................................................. 18

6.3 Normal test conditions ...................................................................................................................................... 18

6.3.1 Normal temperature and humidity .............................................................................................................. 18

6.3.2 Normal power source voltage ..................................................................................................................... 18

6.3.2.1 Mains powered equipment .................................................................................................................... 18

6.3.2.2 Battery powered equipment .................................................................................................................. 19

6.3.2.3 Other power sources .............................................................................................................................. 19

6.4 Extreme test conditions .................................................................................................................................... 19

6.4.1 Extreme temperatures ................................................................................................................................. 19

6.4.2 Extreme values of power source voltage .................................................................................................... 19

6.4.2.1 Mains powered equipment .................................................................................................................... 19

6.4.2.2 Battery powered equipment .................................................................................................................. 19

6.4.2.3 Other power sources .............................................................................................................................. 19

6.5 Procedure for tests at extreme temperatures ..................................................................................................... 19

7 General conditions of measurement ....................................................................................................... 19

7.1 Sequence of testing ........................................................................................................................................... 19

7.2 Test channels .................................................................................................................................................... 20

7.3 Squelch ............................................................................................................................................................. 20

7.4 Arrangements for test signals applied to the receiver input .............................................................................. 20

ETSI
---------------------- Page: 3 ----------------------
4 ETSI EN 301 925 V1.6.1 (2020-12)

7.5 Normal test modulation of the receiver wanted signal ..................................................................................... 20

7.6 Arrangements for monitoring the receiver output ............................................................................................ 20

7.7 Arrangements for test signals applied to the transmitter input ......................................................................... 21

7.8 Normal test modulation of the transmitter ........................................................................................................ 21

7.9 Arrangements for monitoring the transmitter output ........................................................................................ 21

7.10 Arrangements for test of DSC .......................................................................................................................... 21

7.11 Standard test signals for DSC ........................................................................................................................... 21

7.12 Determination of symbol error ratio in the output of the receiver .................................................................... 21

7.13 Reference bandwidths for spurious measurements ........................................................................................... 22

7.14 Interpretation of the measurement results ........................................................................................................ 22

8 Performance checks ................................................................................................................................ 23

8.1 Performance checks - introduction ................................................................................................................... 23

8.2 Performance check - transmitter frequency error ............................................................................................. 23

8.3 Performance check - transmitter carrier power ................................................................................................ 23

8.4 Performance check - transmitter audio frequency harmonic distortion of the emission ................................... 23

8.5 Performance check - receiver sensitivity .......................................................................................................... 23

8.6 Performance check of DSC .............................................................................................................................. 23

9 Environmental tests ................................................................................................................................ 24

9.1 Procedure .......................................................................................................................................................... 24

9.2 Vibration test .................................................................................................................................................... 24

9.2.1 Definition .................................................................................................................................................... 24

9.2.2 Method of measurement ............................................................................................................................. 24

9.2.3 Requirement ................................................................................................................................................ 25

9.3 Temperature tests ............................................................................................................................................. 25

9.3.1 Introduction................................................................................................................................................. 25

9.3.2 General procedure ....................................................................................................................................... 25

9.3.3 Dry heat ...................................................................................................................................................... 25

9.3.3.1 Definition .............................................................................................................................................. 25

9.3.3.2 Method of measurement ........................................................................................................................ 25

9.3.3.3 Requirement .......................................................................................................................................... 25

9.3.4 Damp heat ................................................................................................................................................... 25

9.3.4.1 Definition .............................................................................................................................................. 25

9.3.4.2 Method of measurement ........................................................................................................................ 25

9.3.4.3 Requirement .......................................................................................................................................... 26

9.3.5 Low temperature cycle ................................................................................................................................ 26

9.3.5.1 Definition .............................................................................................................................................. 26

9.3.5.2 Method of measurement ........................................................................................................................ 26

9.3.5.3 Requirement .......................................................................................................................................... 26

10 Transmitter ............................................................................................................................................. 26

10.1 General conditions ............................................................................................................................................ 26

10.2 Frequency error ................................................................................................................................................ 26

10.2.1 Definition .................................................................................................................................................... 26

10.2.2 Method of measurement ............................................................................................................................. 26

10.2.3 Limits .......................................................................................................................................................... 27

10.3 Carrier power .................................................................................................................................................... 27

10.3.1 Definitions .................................................................................................................................................. 27

10.3.2 Method of measurement ............................................................................................................................. 27

10.3.3 Limits .......................................................................................................................................................... 27

10.3.3.1 General .................................................................................................................................................. 27

10.3.3.2 Normal test conditions limits ................................................................................................................ 27

10.3.3.3 Extreme test conditions limits ............................................................................................................... 27

10.4 Frequency deviation ......................................................................................................................................... 27

10.4.1 Definition .................................................................................................................................................... 27

10.4.2 Maximum permissible frequency deviation ................................................................................................ 28

10.4.2.1 Method of measurement ........................................................................................................................ 28

10.4.2.2 Limits .................................................................................................................................................... 28

10.4.3 Reduction of frequency deviation at modulation frequencies above 3 kHz ................................................ 28

10.4.3.1 Method of measurement ........................................................................................................................ 28

10.4.3.2 Limits .................................................................................................................................................... 28

10.5 Sensitivity of the modulator including the microphone ................................................................................... 29

ETSI
---------------------- Page: 4 ----------------------
5 ETSI EN 301 925 V1.6.1 (2020-12)

10.5.1 Definition .................................................................................................................................................... 29

10.5.2 Method of measurement ............................................................................................................................. 29

10.5.3 Limits .......................................................................................................................................................... 29

10.6 Audio frequency response ................................................................................................................................ 29

10.6.1 Definition .................................................................................................................................................... 29

10.6.2 Method of measurement ............................................................................................................................. 30

10.6.3 Limits .......................................................................................................................................................... 30

10.7 Audio frequency harmonic distortion of the emission...................................................................................... 30

10.7.1 Definition .................................................................................................................................................... 30

10.7.2 Method of measurement ............................................................................................................................. 31

10.7.3 Limits .......................................................................................................................................................... 31

10.8 Adjacent channel power ................................................................................................................................... 31

10.8.1 Definition .................................................................................................................................................... 31

10.8.2 Method of measurement ............................................................................................................................. 31

10.8.3 Limits .......................................................................................................................................................... 32

10.9 Conducted spurious emissions conveyed to the antenna .................................................................................. 32

10.9.1 Definition .................................................................................................................................................... 32

10.9.2 Method of measurement ............................................................................................................................. 32

10.9.3 Limit ........................................................................................................................................................... 32

10.10 Residual modulation of the transmitter ............................................................................................................ 32

10.10.1 Definition .................................................................................................................................................... 32

10.10.2 Method of measurement ............................................................................................................................. 32

10.10.3 Limit ........................................................................................................................................................... 33

10.11 Transient frequency behaviour of the transmitter ............................................................................................. 33

10.11.1 Definition .................................................................................................................................................... 33

10.11.2 Method of measurement ............................................................................................................................. 33

10.11.3 Limits .......................................................................................................................................................... 34

10.12 Radiated spurious emission .............................................................................................................................. 36

10.12.1 Definition .................................................................................................................................................... 36

10.12.2 Method of measurement ............................................................................................................................. 36

10.12.3 Limits .......................................................................................................................................................... 37

11 Transmitter with DSC encoder ............................................................................................................... 37

11.1 General ............................................................................................................................................................. 37

11.2 Frequency error (carrier) .................................................................................................................................. 37

11.2.1 Definition .................................................................................................................................................... 37

11.2.2 Method of measurement ............................................................................................................................. 37

11.2.3 Limits .......................................................................................................................................................... 38

11.3 Frequency error (demodulated signal) .............................................................................................................. 38

11.3.1 Definition .................................................................................................................................................... 38

11.3.2 Method of measurement ............................................................................................................................. 38

11.3.3 Limits .......................................................................................................................................................... 38

11.4 Carrier Power ................................................................................................................................................... 38

11.4.1 Definition .................................................................................................................................................... 38

11.4.2 Method of measurement ............................................................................................................................. 38

11.4.3 Limits .......................................................................................................................................................... 38

11.4.3.1 Normal test conditions .......................................................................................................................... 38

11.4.3.2 Extreme test conditions ......................................................................................................................... 39

11.5 Modulation index ............................................................................................................................................. 39

11.5.1 Definition .................................................................................................................................................... 39

11.5.2 Method of measurement ............................................................................................................................. 39

11.5.3 Limits .......................................................................................................................................................... 39

11.6 Modulation rate ................................................................................................................................................ 39

11.6.1 Definition .................................................................................................................................................... 39

11.6.2 Method of measurement ............................................................................................................................. 39

11.6.3 Limits .......................................................................................................................................................... 39

11.7 Residual modulation .....................................................................

...

Final draft ETSI EN 301 925 V1.6.0 (2020-10)
EUROPEAN STANDARD
Radiotelephone transmitters and receivers for
the maritime mobile service operating in VHF bands;
Technical characteristics and methods of measurement
---------------------- Page: 1 ----------------------
2 Final draft ETSI EN 301 925 V1.6.0 (2020-10)
Reference
REN/ERM-TGMAR-607
Keywords
EMC, GMDSS, maritime, radio, telephony, 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 prevailing version of an ETSI

deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.

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.
© ETSI 2020.
All rights reserved.

DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and

of the 3GPP Organizational Partners.

oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and

of the oneM2M Partners.
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3 Final draft ETSI EN 301 925 V1.6.0 (2020-10)
Contents

Intellectual Property Rights ................................................................................................................................ 8

Foreword ............................................................................................................................................................. 8

Modal verbs terminology .................................................................................................................................... 8

1 Scope ........................................................................................................................................................ 9

2 References ................................................................................................................................................ 9

2.1 Normative references ......................................................................................................................................... 9

2.2 Informative references ...................................................................................................................................... 10

3 Definition of terms, symbols and abbreviations ..................................................................................... 11

3.1 Terms ................................................................................................................................................................ 11

3.2 Symbols ............................................................................................................................................................ 12

3.3 Abbreviations ................................................................................................................................................... 12

4 General requirements ............................................................................................................................. 13

4.1 Construction ..................................................................................................................................................... 13

4.2 DSC operation .................................................................................................................................................. 13

4.3 Controls and indicators ..................................................................................................................................... 14

4.4 Handset and loudspeaker .................................................................................................................................. 14

4.5 Safety precautions ............................................................................................................................................ 15

4.6 Labelling........................................................................................................................................................... 15

4.7 Warm up ........................................................................................................................................................... 15

4.8 Audio Processing .............................................................................................................................................. 15

5 Technical requirements .......................................................................................................................... 16

5.1 Switching time .................................................................................................................................................. 16

5.2 Class of emission and modulation characteristics ............................................................................................ 16

5.3 Multiple watch facilities ................................................................................................................................... 16

5.3.1 Additional performance standards .............................................................................................................. 16

5.3.2 Scanning characteristics .............................................................................................................................. 17

5.4 Interfaces .......................................................................................................................................................... 17

5.4.1 General ........................................................................................................................................................ 17

5.4.2 Audio frequency ......................................................................................................................................... 17

5.4.3 Digital interfaces ......................................................................................................................................... 17

5.5 Voyage data recorder interface ......................................................................................................................... 18

6 Test conditions, power sources and ambient temperatures .................................................................... 18

6.1 Test conditions ................................................................................................................................................. 18

6.2 Test power source ............................................................................................................................................. 18

6.3 Normal test conditions ...................................................................................................................................... 18

6.3.1 Normal temperature and humidity .............................................................................................................. 18

6.3.2 Normal power source voltage ..................................................................................................................... 18

6.3.2.1 Mains powered equipment .................................................................................................................... 18

6.3.2.2 Battery powered equipment .................................................................................................................. 19

6.3.2.3 Other power sources .............................................................................................................................. 19

6.4 Extreme test conditions .................................................................................................................................... 19

6.4.1 Extreme temperatures ................................................................................................................................. 19

6.4.2 Extreme values of power source voltage .................................................................................................... 19

6.4.2.1 Mains powered equipment .................................................................................................................... 19

6.4.2.2 Battery powered equipment .................................................................................................................. 19

6.4.2.3 Other power sources .............................................................................................................................. 19

6.5 Procedure for tests at extreme temperatures ..................................................................................................... 19

7 General conditions of measurement ....................................................................................................... 19

7.1 Sequence of testing ........................................................................................................................................... 19

7.2 Test channels .................................................................................................................................................... 20

7.3 Squelch ............................................................................................................................................................. 20

7.4 Arrangements for test signals applied to the receiver input .............................................................................. 20

ETSI
---------------------- Page: 3 ----------------------
4 Final draft ETSI EN 301 925 V1.6.0 (2020-10)

7.5 Normal test modulation of the receiver wanted signal ..................................................................................... 20

7.6 Arrangements for monitoring the receiver output ............................................................................................ 20

7.7 Arrangements for test signals applied to the transmitter input ......................................................................... 21

7.8 Normal test modulation of the transmitter ........................................................................................................ 21

7.9 Arrangements for monitoring the transmitter output ........................................................................................ 21

7.10 Arrangements for test of DSC .......................................................................................................................... 21

7.11 Standard test signals for DSC ........................................................................................................................... 21

7.12 Determination of symbol error ratio in the output of the receiver .................................................................... 21

7.13 Reference bandwidths for spurious measurements ........................................................................................... 22

7.14 Interpretation of the measurement results ........................................................................................................ 22

8 Performance checks ................................................................................................................................ 23

8.1 Performance checks - introduction ................................................................................................................... 23

8.2 Performance check - transmitter frequency error ............................................................................................. 23

8.3 Performance check - transmitter carrier power ................................................................................................ 23

8.4 Performance check - transmitter audio frequency harmonic distortion of the emission ................................... 23

8.5 Performance check - receiver sensitivity .......................................................................................................... 23

8.6 Performance check of DSC .............................................................................................................................. 23

9 Environmental tests ................................................................................................................................ 24

9.1 Procedure .......................................................................................................................................................... 24

9.2 Vibration test .................................................................................................................................................... 24

9.2.1 Definition .................................................................................................................................................... 24

9.2.2 Method of measurement ............................................................................................................................. 24

9.2.3 Requirement ................................................................................................................................................ 25

9.3 Temperature tests ............................................................................................................................................. 25

9.3.1 Introduction................................................................................................................................................. 25

9.3.2 General procedure ....................................................................................................................................... 25

9.3.3 Dry heat ...................................................................................................................................................... 25

9.3.3.1 Definition .............................................................................................................................................. 25

9.3.3.2 Method of measurement ........................................................................................................................ 25

9.3.3.3 Requirement .......................................................................................................................................... 25

9.3.4 Damp heat ................................................................................................................................................... 25

9.3.4.1 Definition .............................................................................................................................................. 25

9.3.4.2 Method of measurement ........................................................................................................................ 25

9.3.4.3 Requirement .......................................................................................................................................... 26

9.3.5 Low temperature cycle ................................................................................................................................ 26

9.3.5.1 Definition .............................................................................................................................................. 26

9.3.5.2 Method of measurement ........................................................................................................................ 26

9.3.5.3 Requirement .......................................................................................................................................... 26

10 Transmitter ............................................................................................................................................. 26

10.1 General conditions ............................................................................................................................................ 26

10.2 Frequency error ................................................................................................................................................ 26

10.2.1 Definition .................................................................................................................................................... 26

10.2.2 Method of measurement ............................................................................................................................. 26

10.2.3 Limits .......................................................................................................................................................... 27

10.3 Carrier power .................................................................................................................................................... 27

10.3.1 Definitions .................................................................................................................................................. 27

10.3.2 Method of measurement ............................................................................................................................. 27

10.3.3 Limits .......................................................................................................................................................... 27

10.3.3.1 General .................................................................................................................................................. 27

10.3.3.2 Normal test conditions limits ................................................................................................................ 27

10.3.3.3 Extreme test conditions limits ............................................................................................................... 27

10.4 Frequency deviation ......................................................................................................................................... 27

10.4.1 Definition .................................................................................................................................................... 27

10.4.2 Maximum permissible frequency deviation ................................................................................................ 28

10.4.2.1 Method of measurement ........................................................................................................................ 28

10.4.2.2 Limits .................................................................................................................................................... 28

10.4.3 Reduction of frequency deviation at modulation frequencies above 3 kHz ................................................ 28

10.4.3.1 Method of measurement ........................................................................................................................ 28

10.4.3.2 Limits .................................................................................................................................................... 28

10.5 Sensitivity of the modulator including the microphone ................................................................................... 29

ETSI
---------------------- Page: 4 ----------------------
5 Final draft ETSI EN 301 925 V1.6.0 (2020-10)

10.5.1 Definition .................................................................................................................................................... 29

10.5.2 Method of measurement ............................................................................................................................. 29

10.5.3 Limits .......................................................................................................................................................... 29

10.6 Audio frequency response ................................................................................................................................ 29

10.6.1 Definition .................................................................................................................................................... 29

10.6.2 Method of measurement ............................................................................................................................. 30

10.6.3 Limits .......................................................................................................................................................... 30

10.7 Audio frequency harmonic distortion of the emission...................................................................................... 30

10.7.1 Definition .................................................................................................................................................... 30

10.7.2 Method of measurement ............................................................................................................................. 31

10.7.3 Limits .......................................................................................................................................................... 31

10.8 Adjacent channel power ................................................................................................................................... 31

10.8.1 Definition .................................................................................................................................................... 31

10.8.2 Method of measurement ............................................................................................................................. 31

10.8.3 Limits .......................................................................................................................................................... 32

10.9 Conducted spurious emissions conveyed to the antenna .................................................................................. 32

10.9.1 Definition .................................................................................................................................................... 32

10.9.2 Method of measurement ............................................................................................................................. 32

10.9.3 Limit ........................................................................................................................................................... 32

10.10 Residual modulation of the transmitter ............................................................................................................ 32

10.10.1 Definition .................................................................................................................................................... 32

10.10.2 Method of measurement ............................................................................................................................. 32

10.10.3 Limit ........................................................................................................................................................... 33

10.11 Transient frequency behaviour of the transmitter ............................................................................................. 33

10.11.1 Definition .................................................................................................................................................... 33

10.11.2 Method of measurement ............................................................................................................................. 33

10.11.3 Limits .......................................................................................................................................................... 34

10.12 Radiated spurious emission .............................................................................................................................. 36

10.12.1 Definition .................................................................................................................................................... 36

10.12.2 Method of measurement ............................................................................................................................. 36

10.12.3 Limits .......................................................................................................................................................... 37

11 Transmitter with DSC encoder ............................................................................................................... 37

11.1 General ............................................................................................................................................................. 37

11.2 Frequency error (carrier) .................................................................................................................................. 37

11.2.1 Definition .................................................................................................................................................... 37

11.2.2 Method of measurement ............................................................................................................................. 37

11.2.3 Limits .......................................................................................................................................................... 38

11.3 Frequency error (demodulated signal) .............................................................................................................. 38

11.3.1 Definition .................................................................................................................................................... 38

11.3.2 Method of measurement ............................................................................................................................. 38

11.3.3 Limits .......................................................................................................................................................... 38

11.4 Carrier Power ................................................................................................................................................... 38

11.4.1 Definition .................................................................................................................................................... 38

11.4.2 Method of measurement ............................................................................................................................. 38

11.4.3 Limits .......................................................................................................................................................... 38

11.4.3.1 Normal test conditions .......................................................................................................................... 38

11.4.3.2 Extreme test conditions ......................................................................................................................... 39

11.5 Modulation index ............................................................................................................................................. 39

11.5.1 Definition .................................................................................................................................................... 39

11.5.2 Method of measurement ............................................................................................................................. 39

11.5.3 Limits .......................................................................................................................................................... 39

11.6 Modulation rate ................................................................................................................................................ 39

11.6.1 Definition .................................................................................................................................................... 39

11.6.2 Method of measurement ............................................................................................................................. 39

11.6.3 Limits .......................................................................................................................................................... 39

11.7 Residual modulation .............
...

Draft ETSI EN 301 925 V1.5.2 (2020-03)
EUROPEAN STANDARD
Radiotelephone transmitters and receivers for
the maritime mobile service operating in VHF bands;
Technical characteristics and methods of measurement
---------------------- Page: 1 ----------------------
2 Draft ETSI EN 301 925 V1.5.2 (2020-03)
Reference
REN/ERM-TGMAR-607
Keywords
EMC, GMDSS, maritime, radio, telephony, 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 prevailing version of an ETSI

deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.

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.
© ETSI 2020.
All rights reserved.

DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and

of the 3GPP Organizational Partners.

oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and

of the oneM2M Partners.
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3 Draft ETSI EN 301 925 V1.5.2 (2020-03)
Contents

Intellectual Property Rights ................................................................................................................................ 8

Foreword ............................................................................................................................................................. 8

Modal verbs terminology .................................................................................................................................... 8

1 Scope ........................................................................................................................................................ 9

2 References ................................................................................................................................................ 9

2.1 Normative references ......................................................................................................................................... 9

2.2 Informative references ...................................................................................................................................... 10

3 Definition of terms, symbols and abbreviations ..................................................................................... 11

3.1 Terms ................................................................................................................................................................ 11

3.2 Symbols ............................................................................................................................................................ 12

3.3 Abbreviations ................................................................................................................................................... 12

4 General requirements ............................................................................................................................. 13

4.1 Construction ..................................................................................................................................................... 13

4.2 DSC operation .................................................................................................................................................. 13

4.3 Controls and indicators ..................................................................................................................................... 14

4.4 Handset and loudspeaker .................................................................................................................................. 14

4.5 Safety precautions ............................................................................................................................................ 14

4.6 Labelling........................................................................................................................................................... 15

4.7 Warm up ........................................................................................................................................................... 15

4.8 Audio Processing .............................................................................................................................................. 15

5 Technical requirements .......................................................................................................................... 16

5.1 Switching time .................................................................................................................................................. 16

5.2 Class of emission and modulation characteristics ............................................................................................ 16

5.3 Multiple watch facilities ................................................................................................................................... 16

5.3.1 Additional performance standards .............................................................................................................. 16

5.3.2 Scanning characteristics .............................................................................................................................. 17

5.4 Interfaces .......................................................................................................................................................... 17

5.4.1 General ........................................................................................................................................................ 17

5.4.2 Audio frequency ......................................................................................................................................... 17

5.4.3 Digital interfaces ......................................................................................................................................... 17

5.5 Voyage data recorder interface ......................................................................................................................... 17

6 Test conditions, power sources and ambient temperatures .................................................................... 18

6.1 Test conditions ................................................................................................................................................. 18

6.2 Test power source ............................................................................................................................................. 18

6.3 Normal test conditions ...................................................................................................................................... 18

6.3.1 Normal temperature and humidity .............................................................................................................. 18

6.3.2 Normal power source voltage ..................................................................................................................... 18

6.3.2.1 Mains powered equipment .................................................................................................................... 18

6.3.2.2 Battery powered equipment .................................................................................................................. 18

6.3.2.3 Other power sources .............................................................................................................................. 18

6.4 Extreme test conditions .................................................................................................................................... 19

6.4.1 Extreme temperatures ................................................................................................................................. 19

6.4.2 Extreme values of power source voltage .................................................................................................... 19

6.4.2.1 Mains powered equipment .................................................................................................................... 19

6.4.2.2 Battery powered equipment .................................................................................................................. 19

6.4.2.3 Other power sources .............................................................................................................................. 19

6.5 Procedure for tests at extreme temperatures ..................................................................................................... 19

7 General conditions of measurement ....................................................................................................... 19

7.1 Sequence of testing ........................................................................................................................................... 19

7.2 Test channels .................................................................................................................................................... 20

7.3 Squelch ............................................................................................................................................................. 20

7.4 Arrangements for test signals applied to the receiver input .............................................................................. 20

ETSI
---------------------- Page: 3 ----------------------
4 Draft ETSI EN 301 925 V1.5.2 (2020-03)

7.5 Normal test modulation of the receiver wanted signal ..................................................................................... 20

7.6 Arrangements for monitoring the receiver output ............................................................................................ 20

7.7 Arrangements for test signals applied to the transmitter input ......................................................................... 20

7.8 Normal test modulation of the transmitter ........................................................................................................ 21

7.9 Arrangements for monitoring the transmitter output ........................................................................................ 21

7.10 Arrangements for test of DSC .......................................................................................................................... 21

7.11 Standard test signals for DSC ........................................................................................................................... 21

7.12 Determination of symbol error ratio in the output of the receiver .................................................................... 21

7.13 Reference bandwidths for spurious measurements ........................................................................................... 21

7.14 Interpretation of the measurement results ........................................................................................................ 22

8 Performance checks ................................................................................................................................ 22

8.1 Performance checks - introduction ................................................................................................................... 22

8.2 Performance check - transmitter frequency error ............................................................................................. 22

8.3 Performance check - transmitter carrier power ................................................................................................ 23

8.4 Performance check - transmitter audio frequency harmonic distortion of the emission ................................... 23

8.5 Performance check - receiver sensitivity .......................................................................................................... 23

8.6 Performance check of DSC .............................................................................................................................. 23

9 Environmental tests ................................................................................................................................ 23

9.1 Procedure .......................................................................................................................................................... 23

9.2 Vibration test .................................................................................................................................................... 24

9.2.1 Definition .................................................................................................................................................... 24

9.2.2 Method of measurement ............................................................................................................................. 24

9.2.3 Requirement ................................................................................................................................................ 24

9.3 Temperature tests ............................................................................................................................................. 24

9.3.1 Introduction................................................................................................................................................. 24

9.3.2 General procedure ....................................................................................................................................... 25

9.3.3 Dry heat ...................................................................................................................................................... 25

9.3.3.1 Definition .............................................................................................................................................. 25

9.3.3.2 Method of measurement ........................................................................................................................ 25

9.3.3.3 Requirement .......................................................................................................................................... 25

9.3.4 Damp heat ................................................................................................................................................... 25

9.3.4.1 Definition .............................................................................................................................................. 25

9.3.4.2 Method of measurement ........................................................................................................................ 25

9.3.4.3 Requirement .......................................................................................................................................... 25

9.3.5 Low temperature cycle ................................................................................................................................ 25

9.3.5.1 Definition .............................................................................................................................................. 25

9.3.5.2 Method of measurement ........................................................................................................................ 26

9.3.5.3 Requirement .......................................................................................................................................... 26

10 Transmitter ............................................................................................................................................. 26

10.1 General conditions ............................................................................................................................................ 26

10.2 Frequency error ................................................................................................................................................ 26

10.2.1 Definition .................................................................................................................................................... 26

10.2.2 Method of measurement ............................................................................................................................. 26

10.2.3 Limits .......................................................................................................................................................... 26

10.3 Carrier power .................................................................................................................................................... 26

10.3.1 Definitions .................................................................................................................................................. 26

10.3.2 Method of measurement ............................................................................................................................. 27

10.3.3 Limits .......................................................................................................................................................... 27

10.3.3.1 General .................................................................................................................................................. 27

10.3.3.2 Normal test conditions limits ................................................................................................................ 27

10.3.3.3 Extreme test conditions limits ............................................................................................................... 27

10.4 Frequency deviation ......................................................................................................................................... 27

10.4.1 Definition .................................................................................................................................................... 27

10.4.2 Maximum permissible frequency deviation ................................................................................................ 27

10.4.2.1 Method of measurement ........................................................................................................................ 27

10.4.2.2 Limits .................................................................................................................................................... 28

10.4.3 Reduction of frequency deviation at modulation frequencies above 3 kHz ................................................ 28

10.4.3.1 Method of measurement ........................................................................................................................ 28

10.4.3.2 Limits .................................................................................................................................................... 28

10.5 Sensitivity of the modulator including the microphone ................................................................................... 29

ETSI
---------------------- Page: 4 ----------------------
5 Draft ETSI EN 301 925 V1.5.2 (2020-03)

10.5.1 Definition .................................................................................................................................................... 29

10.5.2 Method of measurement ............................................................................................................................. 29

10.5.3 Limits .......................................................................................................................................................... 29

10.6 Audio frequency response ................................................................................................................................ 29

10.6.1 Definition .................................................................................................................................................... 29

10.6.2 Method of measurement ............................................................................................................................. 30

10.6.3 Limits .......................................................................................................................................................... 30

10.7 Audio frequency harmonic distortion of the emission...................................................................................... 30

10.7.1 Definition .................................................................................................................................................... 30

10.7.2 Method of measurement ............................................................................................................................. 31

10.7.3 Limits .......................................................................................................................................................... 31

10.8 Adjacent channel power ................................................................................................................................... 31

10.8.1 Definition .................................................................................................................................................... 31

10.8.2 Method of measurement ............................................................................................................................. 31

10.8.3 Limits .......................................................................................................................................................... 32

10.9 Conducted spurious emissions conveyed to the antenna .................................................................................. 32

10.9.1 Definition .................................................................................................................................................... 32

10.9.2 Method of measurement ............................................................................................................................. 32

10.9.3 Limit ........................................................................................................................................................... 32

10.10 Residual modulation of the transmitter ............................................................................................................ 32

10.10.1 Definition .................................................................................................................................................... 32

10.10.2 Method of measurement ............................................................................................................................. 32

10.10.3 Limit ........................................................................................................................................................... 33

10.11 Transient frequency behaviour of the transmitter ............................................................................................. 33

10.11.1 Definition .................................................................................................................................................... 33

10.11.2 Method of measurement ............................................................................................................................. 33

10.11.3 Limits .......................................................................................................................................................... 34

10.12 Radiated spurious emission .............................................................................................................................. 36

10.12.1 Definition .................................................................................................................................................... 36

10.12.2 Method of measurement ............................................................................................................................. 36

10.12.3 Limits .......................................................................................................................................................... 37

11 Transmitter with integrated DSC encoder .............................................................................................. 37

11.1 General ............................................................................................................................................................. 37

11.2 Frequency error (carrier) .................................................................................................................................. 37

11.2.1 Definition .................................................................................................................................................... 37

11.2.2 Method of measurement ............................................................................................................................. 37

11.2.3 Limits .......................................................................................................................................................... 38

11.3 Frequency error (demodulated signal) .............................................................................................................. 38

11.3.1 Definition .................................................................................................................................................... 38

11.3.2 Method of measurement ............................................................................................................................. 38

11.3.3 Limits .......................................................................................................................................................... 38

11.4 Carrier Power ................................................................................................................................................... 38

11.4.1 Definition .................................................................................................................................................... 38

11.4.2 Method of measurement ............................................................................................................................. 38

11.4.3 Limits .......................................................................................................................................................... 38

11.4.3.1 Normal test conditions .......................................................................................................................... 38

11.4.3.2 Extreme test conditions ......................................................................................................................... 39

11.5 Modulation index ............................................................................................................................................. 39

11.5.1 Definition .................................................................................................................................................... 39

11.5.2 Method of measurement ............................................................................................................................. 39

11.5.3 Limits .......................................................................................................................................................... 39

11.6 Modulation rate ................................................................................................................................................ 39

11.6.1 Definition .................................................................................................................................................... 39

11.6.2 Method of measurement ............................................................................................................................. 39

11.6.3 Limits .......................................................................................................................................................... 39

11.7 Residual modulation .............................................
...

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Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.