摘要
为了提高信号测量频率范围及实现小信号频谱的测量,采用超外差式原理,结合DDS与AGC设计了一款简易的频谱分析仪,该频谱分析仪可以测量频率范围为1~30MHz、幅度为0.02~2V信号的频谱.经实测表明,该频谱分析仪具有测量精度高、测量带宽大、成本低和便捷等优点,具有良好的实用价值.
In order to improve the measurement frequency range of the signal and measure the spectrum of small signal, a simple spectrum analyzer is designed based on DDS and AGC with the super heterodyne principle. The spectrum analyzer can measure the spectrum of signal with the frequency range from 1 MHz to 30 MHz, and can measure the spectrum of signal with amplitude from 20 mV to 2 V. The results of test show that the spectrum analyzer has the advantages of high measurement precision, wide measurement bandwidth, low cost and convenient, so it has good practical value.
出处
《延边大学学报（自然科学版）》
CAS
2017年第1期74-77,共4页
Journal of Yanbian University（Natural Science Edition）
基金
福建省教育厅资助项目(JA12305)
国家自然科学基金资助项目(51601104)
