DDS是一种先进的全数字频率合成技术，具有多种数字调制能力，可广泛应用于雷达、通信、导航等领域。文中介绍一种采用AD9854作为DDS设计低杂散、高纯度频谱的卫星数字化调制器实现方法，实际使用效果良好。

DDS is advance digital frequencies synthesize technology, can be used in radar, communication, navigation field etc. This paper introduce a method used AD9854 as the DDS to design the digital modulator for the satellite communication that has lower spurious signals, high pure spectrum, and work well in the actual application.

TN958 TN85