UNE-ETS 300676
RADIO EQUIPMENT AND SYSTEMS (RES). RADIO TRANSMITTERS AND RECEIVERS AT AERONAUTICAL STATIONS OF THE AERONAUTICAL MOBILE SERVICE OPERATING IN THE VHF BAND (118 MHZ-137 MHZ) USING AMPLITUDE MODULATION AND 8,33 KHZ CHANNEL SPACING. TECHNICAL CHARACTERISTICS AND METHODS OF MEASUREMENT.