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 Characteristics and Methods of Measurement
This European Telecommunication Standard (ETS) states the minimum performance requirements for radio transmitters and receivers at ground-based aeronautical stations operating in the VHF band (118 MHz - 137 MHz) allocated to the aeronautical mobile service. The allotment of 8@33 kHz channels in the VHF band has been decided by the International Civil Aviation Organization (ICAO) and may be found in ICAO Annex 10 Volume V [3]. This ETS applies only to Double Side Band (DSB) Amplitude Modulation (AM) systems@ with channel separations of 8@33 kHz intended for analogue speech. Offset carrier operation is not intended in a 8@33 kHz channel separation environment. A system can exist of a combination of the single transmitter or a single receiver or a transceiver. The scope of this ETS is limited to ground base stations@ and excludes ground mobile and handportable stations.