scope:

The present document specifies radio parameters which are necessary for the efficient use of the radio spectrum and for the purpose of type approval. This includes methods of measurements for verifying the limits stated in the present document.

The present document applies to 5,8 GHz Short Range Devices (SRDs) for use in Road Transport Traffic and Telematics (RTTT):

- 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 5 725 MHz to 5 875 MHz Industrial, Scientific and Medical (ISM) band.

The applicability of the present document covers both the Road Side Units (RSUs) and the On Board Units (OBUs) with transceivers and transponders.

The present document 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 complies with ERC/DEC/(92)02 [2] and CEPT/ERC Recommendation 70-03 [3]. It is a specific standard covering various RTTT applications. Depending on the data rate for the RITT system three sets of parameters are specified in the present document:

- RITT systems using down up link data rate up 31,5 kbit/s;

- RITT systems using 500 kbit*s down link and 250 kbits/s up link data rates as the default values;

- RITT systems using down link data between 500 kbit/s and Mbit/s and up link data rates between 144 kbit/s and 1 Mbit/s.

For non-harmonized parameters, national regulatory conditions may apply regarding the type of modulation, channel / frequency separation, maximum transmitter output power / effective radiated power, equipment marking as a condition of the issue of an individual or general license, or, as a condition of use under license exemption.

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.