ETSI - EN 300 761
Electromagnetic Compatibility and Radio Spectrum Matters (ERM); Automatic Vehicle Identification (AVI) for Railways
|Publication Date:||1 August 1997|
The present document applies to 2,45 GHz Short Range Devices (SRDs) for use in Railway AVI which fulfil the Union Internationale des Chemins de fer (UIC) specifications (annex E) and are interoperable with the current UIC system except for the interrogator (Track Units (TU)) bandwidth. The Interrogator bandwidth is limited to 8 MHz shared within five channels:
- with a Radio Frequency (RF) output connection and specified antenna or with an integral antenna;
- for data transmission only;
- operating on radio frequencies in the 2,446 GHz to 2,454 GHz Industrial, Scientific and Medical (ISM) band, with power levels up to 500 mW e.i.r.p as defined in the CEPT/ERC Recommendation T/R 70-03 .
It covers the minimum characteristics considered necessary in order to make the best use of the available frequencies. It does not necessarily include all the characteristics which may be required by a user, nor does it necessarily represent the optimum performance achievable.
The present document is based upon CEPT Recommendations T/R 70-03 . It is a product standard covering various Railway applications where the data transmission of the system will be active only during the presence of the train.
The present document covers fixed installed interrogators (TUs) and transponders (mobile stations). For certain measurements the transponders are measured together with the whole interrogating system.
The present document includes specifications for methods of measurement for equipment fitted with antenna sockets and/or integral antennae.
Additional standards or specifications may be required for equipment such as that intended for connection to the Public Switched Telephone Network (PSTN) or other systems.