摘要
本设计基于外差原理,采用DDS直接频率合成技术,实现了简易逻辑分析仪的设计任务。可对频率为1M～30M的被测信号进行频谱分析,频率分辨率可达10K以下,还具有识别调幅,调频和等幅波信号。
This design based on heterodyne principle,and this system realize the design of simple spectrum analyzer based on the technique of DDS.The scope of measure is from 1MHz to 30MHz.The system specifications are so excellent that the frequency resolution is up to 10 KHz and the AM,FM and CW signals can be recognized.
出处
《湖南农机》
2012年第7期37-38,共2页
Hunnan Agricultural Machinery
关键词
频谱分析仪
混频
外差法
Spectrum analyzer
mixing
Heterodyne
