Radiocomunicaciones

The present document specifies technical characteristics and methods of measurements for the following equipment used in ground-based ATC Surveillance for civil air navigation: • Wide Area Multilateration (WAM) systems with Mode S capabilities which may include Mode A/C, transmitting at 1 030 MHz and at 1 090 MHz, and receiving at 1 090 MHz, used for air traffic control with or without 1 090 MHz phase overlay. The system operates in the frequencies as indicated in Table 1 below. Table 1: WAM service frequencies Signals Service frequencies Interrogation Transmission 1 030 MHz Reference/Test Transmission 1 090 MHz Receive 1 090 MHz Antennas for this equipment are passive. Remote Field Monitors (RFM) as described in [i.6] as well as Vehicle transmitters as described in [i.7] are not covered in the present document. NOTE: The relationship between the present document and essential requirements of article 3.2 of Directive 2014/53/EU [i.1] is given in Annex A.