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。
The properties of domestic high-frequency broadband sweeper, for instance, the dynamic range, logarithmic accuracy, flatness and log linear, still need to be improved.
目前国产高频宽带扫频仪的对数放大器性能还有待提高。
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