VHF air-ground and air-air Digital Link (VDL) Mode 4 radio equipment - Technical characteristics and methods of measurement for aeronautical mobile (airborne) equipment - Part 2: General description and data link layer (Endorsement of the English version EN 302 842-2 V1.4.1 (2015-04) as German standard)
VHF空地和空空数字链路(VDL)模式4无线电设备.航空移动(机载)设备的技术特性和测量方法.第2部分:一般说明和数据链路层(作为德国标准认可英文版EN 302 842-2 V1.4.1(2015-04)