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为了接收全气象频段,本文提出了把频率综合器与接收机联合设计的方法,以得到最佳的性能价格比。在接收机的自动化设计中,频率综合器内设有计算机接口电路,使计算机可直接与频率综合器对接。我们在气象卫星接收设备中采用了数字锁相技术。本文分析了锁相环的噪声特性,以达到在数字锁相的频率综合器的设计中尽量减少干扰的频谱。
In order to receive the full meteorological band, this paper presents a method of jointly designing a frequency synthesizer and a receiver to obtain the best cost performance. In the receiver’s automation design, the frequency synthesizer has a computer interface circuit, so that the computer can directly interface with the frequency synthesizer. We use digital phase-locked technology in weather satellite receiving equipment. This paper analyzes the noise characteristics of PLLs to minimize the spectrum of interference in the design of a digital phase-locked frequency synthesizer.