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。

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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。

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To facilitate realistic testing, the heart of real is the radio frequency attenuation network, a system designed to simulate realistic field conditions for multiple radios.

为方便实际测试，REAL实验室的核心是射频衰减网络，可模拟多个无线电的真实部署。

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Although they have not been found to cause any harm, the cables on conventional pylons, which transmit a three-phase alternating current, generate a strong electric field and a continuous buzz of low-frequency radio waves.

ECONOMIST: Monitor