IEC 61993-1 : 1.0

International Electrotechnical Committee

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Foreword
Introduction
1 Scope
2 Normative references
3 Definitions and abbreviations
    3.1 Definitions
    3.2 Abbreviations
4 General requirements
    4.1 General
    4.2 Composition
    4.3 Design and construction
    4.4 Controls and indicators
    4.5 Interfacing
    4.6 Permissible warming-up period
5 Performance requirements
    5.1 General
    5.2 Compatibility
    5.3 Identification
6 Operational requirements
    6.1 Ship-shore identification
    6.2 Ship-ship identification
7 Technical requirements
    7.1 Channel sensing
    7.2 Class of emission and modulation characteristics
    7.3 Frequency bands and channels
    7.4 Switching time
    7.5 Safety precautions
    7.6 Transmitter
    7.7 Receiver
    7.8 Antenna system
    7.9 Power supply
    7.10 System DSC facility
8 Test conditions
    8.1 General
    8.2 Unspecified tests
    8.3 Test power source
    8.4 Normal test conditions
    8.5 Extreme test conditions
    8.6 Procedures for tests at extreme temperatures
    8.7 Test signals
    8.8 Measurement of bit error rate (BER)
    8.9 Measurement uncertainty and interpretation of the
          measurement results
9 Environmental tests
    9.1 Introduction
    9.2 Temperature tests
    9.3 Vibration
    9.4 Corrosion
    9.5 Rain
10 Performance tests
    10.1 General
    10.2 Compatibility
    10.3 Identification
11 Operational tests
    11.1 Ship-shore identification
    11.2 Ship-ship identification
12 Technical tests
    12.1 Sensing capability
    12.2 Switching time
13 Transmitter tests
    13.1 Frequency error
    13.2 Carrier power
    13.3 Frequency deviation
    13.4 Sensitivity of the modulator
    13.5 Modulation index
    13.6 Adjacent channel power
    13.7 Conducted spurious emissions conveyed to the antenna
    13.8 Transient frequency behaviour of the transmitter
14 Receiver tests
    14.1 Calling sensitivity
    14.2 Dynamic range
    14.3 Co-channel rejection
    14.4 Adjacent channel selectivity
    14.5 Blocking immunity
    14.6 Intermodulation response
    14.7 Conducted spurious emissions into the antenna
15 Other tests
    15.1 Antenna system
    15.2 Power supply
    15.3 Compass safe distance
16 Safety precautions
17 EMC emissions
18 EMC immunity
Annex A (informative) Relationship between bit error rate
(BER) input and symbol error rate (SER) output
Annex B (normative) Power measuring receiver specification
Annex C (informative) Description of the operation of the
system
Figures
1 - Test set-up for measuring transient frequency behaviour
2 - Storage oscilloscope view t1, t2 and t3

Abstract

Defines performance requirements, technical characteristics, operational requirements, test procedures and required test results for shipborne automatic transponder system installations by means of VHF digital selective calling (DSC) techniques, which is associated with IEC 90945.