NEN EN 50068 : 1992 AMD 1 2007

0 Scope
1 Modulation characteristics of the data channel
          (physical layer)
1.1 Subcarrier frequency
1.2 Subcarrier phase
1.3 Subcarrier level
1.4 Method of modulation
1.5 Clock-frequency and data-rate
1.6 Differential coding
1.7 Data-channel spectrum shaping
2 Baseband coding (data-link layer)
2.1 Baseband coding structure
2.2 Order of bit transmission
2.3 Error protection
2.4 Synchronization of blocks and groups
3 Message format (session and presentation
          layers)
3.1 Addressing
3.1.1 Design principles
3.1.2 Principal features
3.1.3 Group types
3.1.3.1 Type 0 groups: Basic tuning and switching
          information
3.1.3.2 Type 1 groups: Programme-item number and slow
          labelling codes
3.1.3.3 Type 2 groups: Radiotext
3.1.3.4 Type 4A groups: Clock-time and date
3.1.3.5 Type 5 groups: Transparent data channels
3.1.3.6 Type 6 groups: In-house applications
3.1.3.7 Type 7A groups: Radio paging
3.1.3.8 Type 9A groups: Emergency warning system
3.1.3.9 Type 14 groups: Enhanced Other Networks
          information
3.1.3.10 Type 15B groups: Fast basic tuning and
          switching information
3.2 Coding of information
3.2.1 Coding of information for control
3.2.1.1 Programme-identification (PI) codes and
          Extended Country codes (ECC)
3.2.1.2 Programme-type (PTY) codes
3.2.1.3 Traffic-programme (TP) and traffic-
          announcement (TA) codes
3.2.1.4 Music/speech (M/S) switch code
3.2.1.5 Decoder-identification (DI) codes
3.2.1.6 Coding of Alternative frequencies (AFs) in
          group 0A
3.2.1.7 Programme-item number (PIN) codes
3.2.1.8 Coding of Enhanced Other Networks
          information (EON)
3.2.2 Coding of information for display
3.2.3 Coding of clock-time and date
3.2.4 Coding of information for transparent data
          channels
3.2.5 Coding of information for in-house
          applications
3.2.6 Coding of Radio paging (RP)
3.2.6.1 Introduction
3.2.6.2 Coding characteristics for paging
3.2.6.3 Examples of the traffic handling capacity of
          the specified RP system
3.2.7 Coding of Emergency warning system (EWS)
4 Glossary of terms of applications
4.1 Programme identification (PI)
4.2 Programme service (PS) name
4.3 Programme type (PTY)
4.4 Traffic-programme identification (TP)
4.5 List of Alternative frequencies
4.6 Traffic-announcement identification (TA)
4.7 Decoder identification (DI)
4.8 Music/speech switch (M/S)
4.9 Programme-item number (PIN)
4.10 Radiotext (RT)
4.11 Enhanced Other Networks information (EON)
4.12 Transparent data channel (TDC)
4.13 In-house application (IH)
4.14 Clock-time and date (CT)
4.15 Radio paging (RP)
4.16 Emergency warning systems (EWS)
4.17 Traffic Message Channel (TMC)
5 Marking
Annexes
A Offset words to be used for group and block
          synchronization
B Theory and implementation of the modified
          shortened cyclic code
C Implementation of group and block
          synchronization using the modified shortened
          cyclic code
D Programme identification codes and Extended
          country codes
E Character definition for Program Service name,
          Radiotext and Alphanumeric Radio paging
F Programme Type codes
G Conversion between time and date conventions
H Specification of the ARI system
J Index of abbreviations
K RDS logo
L Bibliography
National annex NA (informative) Committees responsible
National annex NB (informative) Cross-reference

Applies to fusion welded wrought steel enclosures pressurized with dry air, inert gases, e.g. sulfur hexafluoride or nitrogen or a mixture of such gases, used in indoor or outdoor installations of high voltage switchgear and controlgear with rated voltages 72,5 kV and above, where the gas is used for its dielectric and/or arc quenching properties. Enclosures comprise parts of electrical equipment such as circuit breakers, switch disconnectors, earthing switches, current and voltage transformers, surge arrestors and bushbars and connections. Includes pressurized components such as centre chamber of live tank switchgear, gas insulated current transformers, etc.