This paper introduced the design and development of a virtual frequency sweeper based on DDS technology. The DDS technology and the method to design the frequency sweeping generator were illustrated.

介绍了基于DDS技术的虚拟扫频仪的硬件与软件设计，并详述了DDS技术以及用该技术实现扫频信号源的方法。

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This article describes the design of a linear sweeping frequency signal generator using DDS technology.

本文介绍了利用DDS来产生线性扫频信号的射频信号发生单元的设计。

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In hard-hit Kansas, there were at least six storm-related deaths: two siblings who died of carbon monoxide poisoning from a generator, three people in fatal vehicle accidents and an elderly woman who died of hypothermia sweeping snow off her steps, Gov. Sam Brownback said.

CNN: Drawn-out snowstorm lingers in Maine, New Hampshire