DIN EN 301842-4:2011 VHF空地数字链路(VDL)模式4无线电设备.地面设备的技术特性和测量方法.第4部分:点对点功能(作为德标的英文版 EN 301842-4 V1.2.2(2010-12)核准本
VHF air-ground Digital Link (VDL) Mode 4 radio equipment - Technical characteristics and methods of measurement for ground-based equipment - Part 4: Point-to-point functions (Endorsement of the English version EN 301842-4 V1.2.2 (2010-12) as German standa