直接频率合成器 (DDS)ad9956 单点频功能程序，用于c51单片机控制ad9956,程序为设置70M点频，用户设置不同频控码，即可设置不同频率。 -Direct frequency synthesizer (DDS) ad9956 frequency function of a single point of procedure, for the C51 single-chip control ad9956, procedures for the establishment of 70

基于AD公司的AD9958高速直接数字频率合成芯片，适合于高精度标准、非标准信号源等场合。最高工作频率：500MHz.可以调频调幅，AM,FSK,ASK 双通道输出.-AD based on the company AD AD9958 high-speed direct digital frequency synthesizer chip, suitable for high-precision standards, and so on non-standard signal source.

AD9910的实验代码，使用并口实现快速调频，编程通过原理图和语言混合-AD9910 experimental code, the use of parallel fast FM, the programming language through the schematic and mixed