The Railway Certification Laboratory can carry out the whole set of tests for the BTM/Antenna Unit covered by the UNISIG SUBSET-085 specification.
The purpose of these tests is to verify full and safe operability, regardless of the manufacturer, between on-board and trackside equipment.
The tests are carried out under all the debris and metallic mass conditions defined in SUBSET-085. In particular, the conditions applied are: clear water (class A and B), salt water (class A and B), ice, magnetite (class A and B), metallic plate underneath the Balise (case 1, 2 and 3), steel sleeper and other metallic objects near the Balise and around the Antenna Unit.
The tests established by SUBSET-085 and carried out by the laboratory cover the following:
- Characterisation of the Tele-powering and Up-link radiation patterns of the Antenna Unit in the various installation and environmental conditions;
- Verification of the reliability of data communication and of correct handling of the Up-link signal through simulation of a Balise passed several times:
- Simulation at reduced and maximum speed;
- Simulation of groups of Balise;
- Simulation of the extreme values of the electrical characteristics of the Up-link signal;
- Simulation of different telegram types and telegram switching;
- Verification of the electrical characteristics of the Tele-powering signal and of compliance with the maximum intensity of the radiated field;
- Verification of the compatibility with KER Balises;
- Evaluation of Cross-talk protection margins, also in the presence of cables nearby and of the LZB cable;
- Verification of the diagnostic functions of the BTM/Antenna Unit and of the correct handling of metal masses which may be present along the track;
- Verification of the correct function of the basic receiver through telegrams with specific error types (S type telegrams).