DS EN 300674-1:2004 Electromagnetic Compatibility And Radio Spectrum Matters (Erm) - Road Transport And Traffic Telematics (Rttt) - Dedicated Short Range Communication (Dsrc) Transmission Equipment (500 Kbit/S/250 Kbit/S) Operating In The 5,8 Ghz Industrial, Scientific And Medical (Ism) Band - Part 1: General Characteristics And Test Methods For Road Side Units (Rsu) And On-Board Units (Obu) Pertains to Road Transport Traffic and Telematics (RTTT) wireless systems: - with or without antenna connectors; - for digital data transmission; - operating on radio frequencies in the 5,725 GHz to 5