Electromagnetic compatibility & Radio spectrum Matters; VHF air-ground Digital Link (VDL) Mode 4 radio equipment; Technical characteristics & methods of measurement for ground-based equipment; VDL4 ground-based constituent requirement traceability with the SES 552/2004 interoperability Regulation
电磁兼容性和无线电频谱问题;甚高频空地数字链路(VDL)模式4无线电设备;地面设备的技术特性和测量方法;VDL4地面组件需求可追溯性符合SES 552/2004互操作性法规