ETSI - EN 300 761-1
Electromagnetic Compatibility and Radio Spectrum Matters (ERM); Short Range Devices (SRD); Automatic Vehicle Identification (AVI) for Railways Operating in the 2,45 GHz Frequency Range; Part 1: Technical Characteristics and Methods of Measurement
| Organization: | ETSI |
| Publication Date: | 1 April 2001 |
| Status: | inactive |
| Page Count: | 58 |
scope:
The present document applies to a dedicated 2,45 GHz Short Range Device (SRD) microwave link intended for a European wide data communication system for Railway applications, Automatic Vehicle Identification (AVI).which fulfil the relevant Union Internationale des Chemins de fer (UIC) specifications (see Bibliography) and are interoperable with the current UIC system except for the interrogator (Track Units (TU)) bandwidth.
The present document contains the technical characteristics for radio equipment and is referenced by CEPT/ERC Recommendation T/R 70-03 [2] .
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.
The present document 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 in-track base station (interrogator) transmit and receive modulations are a combination of Amplitude Shift Keying (ASK) and Frequency Shift Keying (FSK) respectively.
The present document supports the necessary transmitter and receiver data rates between 192 kbit/s and 384 kbit/s according to the type of transaction.
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 includes specifications for methods of measurement for equipment fitted with antenna sockets and/or integral antenna.
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.
Document History
