The present document covers the technical requirements for radio transmitters and receivers used in stations in the Private Mobile Radio (PMR) service. It applies to use in the land mobile service, operating on radio frequencies between 30 MHz and 1 GHz, with channel separations of 12,5 kHz, 20 kHz and 25 kHz, intended for speech and/or data. It applies to equipment for continuous and/or discontinuous transmission of data and/or digital speech. The equipment comprises a transmitter and associated encoder and modulator and/or a receiver and associated demodulator and decoder. The types of equipment covered by the present document are as follows: 1) base station (equipment fitted with an antenna connector, intended for use in a fixed location); 2) mobile station (equipment fitted with an antenna connector, normally used in a vehicle or as a transportable); and 3) those handportable stations: a) fitted with an antenna connector; or b) without an external antenna connector , but fitted with a permanent internal or a temporary internal 50 O Radio Frequency (RF) connector which allows access to the transmitter output and the receiver input. Handportable equipment without an external or internal RF connector and without the possibility of having a temporary internal 50 O RF connector is not covered by the present document