SIST EN 301 025-1 V1.2.1:2006

SLOVENSKI STANDARD
01-marec-2006
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Electromagnetic compatibility and Radio spectrum Matters (ERM); VHF radiotelephone
equipment for general communications and associated equipment for Class D Digital
Selective Calling (DSC); Part 1: Technical characteristics and methods of measurement
Ta slovenski standard je istoveten z: EN 301 025-1 Version 1.2.1
ICS:
33.060.99 Druga oprema za radijske Other equipment for
komunikacije radiocommunications
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

ETSI EN 301 025-1 V1.2.1 (2004-09)
European Standard (Telecommunications series)

Electromagnetic compatibility
and Radio spectrum Matters (ERM);
VHF radiotelephone equipment for general communications
and associated equipment for Class "D"
Digital Selective Calling (DSC);
Part 1: Technical characteristics and
methods of measurement
2 ETSI EN 301 025-1 V1.2.1 (2004-09)

Reference
REN/ERM-TG26-057-1
Keywords
maritime, radio, traffic, VHF
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© European Telecommunications Standards Institute 2004.
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ETSI
3 ETSI EN 301 025-1 V1.2.1 (2004-09)
Contents
Intellectual Property Rights.9
Foreword.9
1 Scope.10
2 References.10
3 Definitions, symbols and abbreviations .11
3.1 Definitions.11
3.2 Symbols.11
3.3 Abbreviations.11
4 General and operational requirements.12
4.1 General.12
4.2 Composition.12
4.3 Construction.12
4.4 Controls and indicators.12
4.5 Facilities for coding and decoding of DSC .13
4.5.1 Call functions.13
4.5.2 MANUAL calls.14
4.5.3 Distress calls.14
4.5.4 ALL SHIPS calls .14
4.5.5 Incoming calls.15
4.5.6 Other calls.15
4.6 DSC display.15
4.7 Handset and loudspeaker.15
4.8 Safety precautions.15
4.9 Labelling.16
4.10 Warm up.16
5 Technical requirements.16
5.1 Switching time.16
5.2 Class of emission and modulation characteristics .16
5.3 Facilities for DSC transmission and reception .16
5.3.1 General.16
5.3.2 Decoding.17
5.3.3 Free channel transmission.17
5.3.4 Automatic acknowledgement.17
5.3.5 Automatic re-transmission of distress calls .17
5.4 Ships identity - MMSI and Group MMSI .17
5.5 Entry of position information .17
5.6 Alarm circuits.18
5.6.1 Distress and urgency.18
5.6.2 Other categories.18
5.6.3 Acoustic alarms.18
5.6.4 Cancellation of alarms .18
5.7 Multiple watch facilities.18
5.7.1 General.18
5.7.2 Scanning provisions.18
5.7.3 Scanning characteristics.19
6 General conditions of measurement.19
6.1 Arrangements for test signals applied to the receiver input.19
6.2 Squelch.19
6.3 Transmission time limitation.19
6.4 Normal test modulation.20
6.5 Artificial antenna.20
6.6 Arrangements for test signals applied to the transmitter input .20
6.7 Test channels.20
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4 ETSI EN 301 025-1 V1.2.1 (2004-09)
6.8 Generation and examination of the digital selective call signal .20
6.9 Standard test signals for DSC.20
6.10 Determination of the symbol error ratio in the output of the receiving part.21
6.11 Measurement uncertainty and interpretation of the measured results .21
6.11.1 Measurement uncertainty.21
6.11.2 Interpretation of the measurement results.21
6.12 Test conditions, power sources, and ambient temperatures.22
6.12.1 Normal and extreme test conditions.22
6.12.2 Test power source .22
6.13 Normal test conditions.22
6.13.1 Normal temperature and humidity.22
6.13.2 Normal power sources .22
6.13.2.1 Battery power source.22
6.13.2.2 Other power sources.22
6.14 Extreme test conditions .22
6.14.1 Extreme temperatures.22
6.14.2 Extreme values of test power sources.23
6.14.2.1 Battery power source.23
6.14.2.2 Other power sources.23
6.15 Procedure for tests at extreme temperatures.23
7 Environmental tests.23
7.1 Introduction.23
7.2 Procedure.23
7.3 Performance check.23
7.4 Vibration test.24
7.4.1 Definition.24
7.4.2 Method of measurement.24
7.4.3 Requirement.24
7.5 Temperature tests.24
7.5.1 Definition.24
7.5.2 Dry heat.25
7.5.2.1 Definition.25
7.5.2.2 Method of measurement.25
7.5.2.3 Requirement.25
7.5.3 Damp heat.25
7.5.3.1 Definition.25
7.5.3.2 Method of measurement.25
7.5.3.3 Requirement.25
7.5.4 Low temperature.25
7.5.4.1 Definition.25
7.5.4.2 Method of measurement.26
7.5.4.3 Requirement.26
8 Transmitter.26
8.1 Frequency error.26
8.1.1 Definition.26
8.1.2 Method of measurement.26
8.1.3 Limits.26
8.2 Carrier power.26
8.2.1 Definition.26
8.2.2 Method of measurement.26
8.2.3 Limits.27
8.2.3.1 Normal test conditions .27
8.2.3.2 Extreme test conditions .27
8.3 Frequency deviation.27
8.3.1 Definition.27
8.3.2 Maximum permissible frequency deviation.27
8.3.2.1 Method of measurement.27
8.3.2.2 Limits.27
8.3.3 Reduction of frequency deviation at modulation frequencies above 3 kHz.27
8.3.3.1 Method of measurement.27
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5 ETSI EN 301 025-1 V1.2.1 (2004-09)
8.3.3.2 Limits.28
8.4 Sensitivity of the modulator, including microphone .28
8.4.1 Definition.28
8.4.2 Method of measurement.28
8.4.3 Limits.28
8.5 Audio frequency response .28
8.5.1 Definition.28
8.5.2 Method of measurement.29
8.5.3 Limit.29
8.6 Audio frequency harmonic distortion of the emission.29
8.6.1 Definition.29
8.6.2 Method of measurement.30
8.6.2.1 Normal test conditions .30
8.6.2.2 Extreme test conditions .30
8.6.3 Limits.30
8.7 Adjacent channel power .30
8.7.1 Definition.30
8.7.2 Method of measurement.30
8.7.3 Limits.31
8.8 Conducted spurious emissions conveyed to the antenna .31
8.8.1 Definition.31
8.8.2 Method of measurement.31
8.8.3 Limit.31
8.9 Cabinet radiation and conducted spurious emissions other than those conveyed to the antenna .31
8.9.1 Definitions.31
8.9.2 Method of measurement.31
8.9.3 Limits.32
8.10 Transient frequency behaviour of the transmitter.32
8.10.1 Definitions.32
8.10.2 Method of measurement.33
8.10.3 Limits.35
8.11 Residual modulation of the transmitter .35
8.11.1 Definition.35
8.11.2 Method of measurement.35
8.11.3 Limit.35
8.12 Frequency error (demodulated DSC signal).35
8.12.1 Definition.35
8.12.2 Method of measurement.36
8.12.3 Limits.36
8.13 Modulation index for DSC .36
8.13.1 Definition.36
8.13.2 Method of measurement.36
8.13.3 Limits.36
8.14 Modulation rate for DSC.36
8.14.1 Definition.36
8.14.2 Method of measurement.36
8.14.3 Limits.36
8.15 Testing of generated call sequences .37
8.15.1 Definition.37
8.15.2 Method of measurement.37
8.15.3 Requirement.37
8.16 Testing of free channel transmission on DSC channel 70 .37
8.16.1 Definition.37
8.16.2 Method of measurement.37
8.16.3 Requirement.37
9 Radiotelephone receiver.38
9.1 Harmonic distortion and rated audio-frequency output power.38
9.1.1 Definition.38
9.1.2 Methods of measurement.38
9.1.3 Limits.38
9.2 Audio frequency response .38
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6 ETSI EN 301 025-1 V1.2.1 (2004-09)
9.2.1 Definition.38
9.2.2 Method of measurement.38
9.2.3 Limits.39
9.3 Maximum usable sensitivity.39
9.3.1 Definition.39
9.3.2 Method of measurement.39
9.3.3 Limits.40
9.4 Co-channel rejection.40
9.4.1 Definition.40
9.4.2 Method of measurement.40
9.4.3 Limit.40
9.5 Adjacent channel selectivity.40
9.5.1 Definition.40
9.5.2 Method of measurement.40
9.5.3 Limits.41
9.6 Spurious response rejection.41
9.6.1 Definition.41
9.6.2 Method of measurement.41
9.6.3 Limit.41
9.7 Intermodulation response.41
9.7.1 Definition.41
9.7.2 Method of measurement.42
9.7.3 Limit.42
9.8 Blocking or desensitization .42
9.8.1 Definition.42
9.8.2 Method of measurement.42
9.8.3 Limit.42
9.9 Spurious emissions.43
9.9.1 Definition.43
9.9.2 Method of measuring the power level .43
9.9.3 Limit.43
9.10 Receiver radiated spurious emissions.43
9.10.1 Definition.43
9.10.2 Method of measurements.43
9.10.3 Limit.44
9.11 Receiver residual noise level .44
9.11.1 Definition.44
9.11.2 Method of measurement.44
9.11.3 Limit.44
9.12 Squelch operation.44
9.12.1 Definition.44
9.12.2 Method of measurement.45
9.12.3 Limits.45
9.13 Squelch hysteresis.45
9.13.1 Definition.45
9.13.2 Method of measurement.45
9.13.3 Limit.45
9.14 Multiple watch characteristic.46
9.14.1 Definition.46
9.14.2 Method of measurement.46
9.14.3 Limits.46
10 Receiver for DSC decoder.46
10.1 Maximum usable sensitivity.46
10.1.1 Definition.46
10.1.2 Method of measurement.46
10.1.3 Limits.47
10.2 Co-channel rejection.47
10.2.1 Definition.47
10.2.2 Method of measurement.47
10.2.3 Limits.47
10.3 Adjacent channel selectivity.47
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7 ETSI EN 301 025-1 V1.2.1 (2004-09)
10.3.1 Definition.47
10.3.2 Method of measurement.47
10.3.3 Limits.48
10.4 Spurious response and blocking immunity.48
10.4.1 Definition.48
10.4.2 Method of measurement.48
10.4.3 Limits.48
10.5 Intermodulation response.48
10.5.1 Definition.48
10.5.2 Method of measurement.48
10.5.3 Limits.49
10.6 Dynamic range.49
10.6.1 Definition.49
10.6.2 Method of measurement.49
10.6.3 Limit.49
10.7 Spurious emissions.49
10.7.1 Definition.49
10.7.2 Method of measuring the power level .49
10.7
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