CAJ | 학술논문

设计了一种基于直接数字频率合成技术（ DDS ）的 RF 合成信号源系统。系统采用AD9852和单片机 C8051F020相结合的方法，以 AD9852为频率合成器，以信号处理器 C8051F020为系统控制和任务调度中心。系统可实现输出信号频率在1 Hz～40 MHz 可调，最小可调步进为1 Hz ，并且频率稳定度优于10-5。此外，系统实现了调幅、调频、相移键控、频移键控和扫频等功能。在完成软硬件设计后，通过使用多种电子仪器对系统性能和技术参数进行实验测试，结果表明各项指标都符合设计要求。
설계료일충기우직접수자빈솔합성기술（ DDS ）적 RF 합성신호원계통。계통채용AD9852화단편궤 C8051F020상결합적방법，이 AD9852위빈솔합성기，이신호처리기 C8051F020위계통공제화임무조도중심。계통가실현수출신호빈솔재1 Hz～40 MHz 가조，최소가조보진위1 Hz ，병차빈솔은정도우우10-5。차외，계통실현료조폭、조빈、상이건공、빈이건공화소빈등공능。재완성연경건설계후，통과사용다충전자의기대계통성능화기술삼수진행실험측시，결과표명각항지표도부합설계요구。
The paper designs a kind of RF synthetic source system based on the technology of direct digital frequency synthesis(DDS). The system uses method of AD9852 and MCU C8051F020 combination, uses AD9850 as frequency synthesizer, and uses MCU C8051F020 as the center of system control and task scheduling. The system can achieve the output signal frequency range for 1 Hz to 40 MHz adjustable, the minimum adjustable step is 1Hz, and the frequency stability is better than 10-5. In addition, the system realizes the amplitude modulation, frequency modulation, phase shift keying, frequency shift keying and sweep functions. The system has been completed the design of hardware and software, and each index meets the design requirements through using a variety of electronic instruments on system performance and technical parameters.