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KER Balises - Functional tests Subset-101 and Subset-102


The Railway Certification Laboratory can carry out the functional tests defined in UNISIG SUBSET-102 to verify the characteristics of interface K defined in UNISIG SUBSET-101.

The functional tests established by SUBSET-102 and carried out by the laboratory are as follows:

On-board Transmission Equipment test
  • Electrical data
  • Data transmission
  • Timing requirements
  • Functional data
  • Link check functionality
  • Transmission and bit stream requirements:
    • Evaluation of radiation pattern
    • Transmission tests
    • Electrical Tele-powering characteristics
    • Maximum flux level
    • Up-link characteristics
    • Cross-talk immunity
    • Cross-talk immunity with cables
    • Balise Detectability supervision
STM test
  • Electrical data
  • Data transmission
  • Timing requirements
  • Functional data
  • Link check functionality
  • Handling of diversified data
  • Detection of Balises
  • Management of side lobe effects
  • Telegram decoding

FAQ: UNISIG SUBSET-101 AND UNISIG SUBSET-102

SUBSET-101 defines interface K as the interface between the BTM function of the ERTMS/ETCS on-board equipment and the KER STM. The adoption of this interface allows a common Antenna Unit to be used by both the ERTMS/ETCS on-board equipment and one or more KER STM.

Interface K has been designed to enable the transfer of data from the KER Balises (older generation of Balises compared to the EUROBALISE ones) to the STM module, via the BTM/Antenna Unit. This makes it possible to avoid the use of several antennas when the KER STM is used, saving the cost of the equipment and simplifying the installation o​n vehicles.



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