The present document specifies technical characteristics and methods of measurements for Wideband Data Transmission Systems (WDTS) fixed equipment installations intended for mobile network applications and mobile equipment operating indoor and outdoor in the 57 GHz to 71 GHz frequency range. The scope of the present document includes equipment in this frequency range in compliance with ERC Recommendation 70-03 [i.3], annex 3 frequency band c2, frequency band c3 and Commission Decision 2019/1345/EU [i.4] bands 75a and 75b. Radio equipment within the scope of the present document are capable of operating in all or any part of the frequency bands given in table 1.