Additionally, Dragon Runner SUGV, gives operators field-changeable frequency capabilities, using analogue or digital radio options.
此外，通过模拟或数字无线电选项，“龙信使”可以为操作人员在野外环境提供可变频通信能力。
2
The first stage of the European Low Frequency Array (Lofar) telescope involves 96 radio antennae being erected this week in a field at the Chilbolton Observatory near Andover, Hampshire.
Lofar望远镜的一期工程位于罕布什尔的安多佛，由96个无线电天线组成的望远镜将在本周被安装完毕。
3
To facilitate realistic testing, the heart of real is the radiofrequency attenuation network, a system designed to simulate realistic field conditions for multiple radios.