IEC 62238:2003

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
   3.1 Definitions
   3.2 Abbreviations
4 General and operational requirements
   4.1 General
   4.2 Composition
   4.3 Construction
   4.4 Controls and indicators
   4.5 Facilities for coding and decoding of DSC
   4.6 DSC display
   4.7 Handset and loudspeaker
   4.8 Safety precautions
   4.9 Labelling
   4.10 Warm up
5 Technical requirements
   5.1 Switching time
   5.2 Class of emission and modulation characteristics
   5.3 Facilities for DSC transmission and reception
   5.4 Ships identity - MMSI and Group MMSI
   5.5 Entry of position information
   5.6 Alarm circuits for incoming calls
   5.7 Multiple watch facilities
   5.8 Built-in test
6 General conditions of measurement
   6.1 Arrangements for test signals applied to the receiver
         input
   6.2 Squelch
   6.3 Normal test modulation
   6.4 Artificial antenna
   6.5 Arrangements for test signals applied to the transmitter
         input
   6.6 Test channels
   6.7 Generation and examination of the digital selective call
         signal
   6.8 Standard test signals for DSC
   6.9 Determination of the symbol error ratio in the output of
         the receiving part
   6.10 Measurement uncertainty and interpretation of the measured
         results
   6.11 Test conditions, power sources, and ambient temperatures
   6.12 Normal test conditions
   6.13 Extreme test conditions
   6.14 Procedure for tests at extreme temperatures
7 Environmental tests
   7.1 Introduction
   7.2 Procedure
   7.3 Performance check
   7.4 Vibration test
   7.5 Temperature tests
8 Transmitter
   8.1 Frequency error
   8.2 Carrier power
   8.3 Frequency deviation
   8.4 Sensitivity of the modulator, including microphone
   8.5 Audiofrequency response
   8.6 Audiofrequency harmonic distortion of the emission
   8.7 Adjacent channel power
   8.8 Conducted spurious emissions conveyed to the antenna
   8.9 Transient frequency behaviour of the transmitter
   8.10 Residual modulation of the transmitter
   8.11 Frequency error (DSC signal)
   8.12 Modulation index for DSC
   8.13 Modulation rate for DSC
   8.14 Testing of generated call sequences
9 Radiotelephone receiver
   9.1 Harmonic distortion and rated audiofrequency output power
   9.2 Audiofrequency response
   9.3 Maximum usable sensitivity
   9.4 Co-channel rejection
   9.5 Adjacent channel selectivity
   9.6 Spurious response rejection
   9.7 Intermodulation response
   9.8 Blocking or desensitization
   9.9 Spurious emissions
   9.10 Receiver residual noise level
   9.11 Squelch operation
   9.12 Squelch hysteresis
   9.13 Multiple watch characteristic
10 Receiver for DSC decoder
   10.1 Maximum usable sensitivity
   10.2 Co-channel rejection
   10.3 Adjacent channel selectivity
   10.4 Spurious response and blocking immunity
   10.5 Intermodulation response
   10.6 Dynamic range
   10.7 Spurious emissions
   10.8 Verification of correct decoding of various types of DSC
         calls
   10.9 Reaction to VTS and AIS channel management DSC
         transmissions
   10.10 Simultaneous reception
11 Electromagnetic compatibility
Annex A (normative) DSC Calls
Annex B (normative) Power measuring receiver specification
   B.1 IF filter
   B.2 Attenuation indicator
   B.3 RMS value indicator
   B.4 Oscillator and amplifier
Annex C (informative) Summary of major differences of this
         standard from existing regional standards
   C.1 European Standard EN 301 025
   C.2 American Standard RTCM Special Committee No 101
Annex D (informative) Recommended standards for equipment
         operating in high level electromagnetic environments
   D.1 Introduction
   D.2 Method of measurement
   D.3 Limits
Annex E (informative) International VHF marine radio channels
         and frequencies
Annex F (informative) U.S. VHF marine radio channels and
         frequencies
Annex G (informative) CANADIAN VHF marine radio channels and
         frequencies
Figures

Includes the minimum requirements for general communication for shipborne fixed installations using a VHF radiotelephone incorporating class "D" Digital Selective Calling. Includes the relevant provisions of the ITU Radio Regulations and incorporates the relevant IMO guidelines. Also specifies technical characteristics, methods of measurement and required test results.