EN 61603-3:1998

1 General
    1.1 Scope
    1.2 Normative references
    1.3 Definitions
2 Explanation of terms and general information
3 System considerations
    3.1 Application area
    3.2 Environment
    3.3 System planning and installation
    3.4 Partition of functions between elements of the
          system
4 General conditions for measurements
5 Characteristics to be specified and their methods of
    measurement
    5.1 Characteristics of the IR source
    5.2 Characteristics of the receiver
6 Interface (matching) values, performance requirements
    and recommendations
    6.1 Interface values for transmitter output signals
    6.2 Interface values for radiator input signals
    6.3 Polarity
    6.4 Spurious emissions and signals
    6.5 Sensitivity to random incidence
    6.6 Rated signal-to-noise ratio
    6.7 Channel allocation and modulation characteristics
    6.8 Interface values for audio signals
    6.9 Overall audio frequency performance requirements
7 Marking and contents of specifications
    7.1 Marking
    7.2 Contents of specifications
Tables
1 Channel code, identification number and subcarrier
    frequency
2 Marking and contents of specifications
Tables
1 Channel code, identification number and subcarrier
    frequency
2 Marking and contents of specifications
Figures
1 Schematic representation of a conference sound system
2 Signal chain and related IEC standards
3 Allocation of channels and recommended carriers L
Annex ZA Normative reference to international publications
with their corresponding European publications

Gives methods for measuring and specifying those characteristics of audio infra-red (IR) transmission systems for conference and similar systems which are not covered by part 1.