The present document specifies the minimum technical characteristics of TETRA Voice plus Data (V+D) Base Stations (BS) and Mobile Station (MS) equipment@ and TETRA Direct Mode Operation (DMO) equipment@ and the radio test methods used for type testing. Specific test methods for DMO equipment are defined in annex F of the present document. The purpose of these specifications is to provide a sufficient quality of radio transmission and reception for equipment operating in a TETRA system and to minimize harmful interference to other equipment. The present document is applicable to TETRA systems operating at radio frequencies in the range of 300 MHz to 1 GHz. These specifications do not necessarily include all the characteristics which may be required by a user of equipment@ nor do they necessarily represent the optimum performance achievable.