WT-3A卫星云图接收机最容易发生故障的地方在高频分机,而第一本级振荡器稳定性差又是其中的症结之一。该机本振采用集中参数微波压控振荡电路,具有结构简单、容易起振等优点。但它易受环境因素的影响,频率漂移量大,频率调节电位器不仅需要经常变动,而且有时还会发生大范围的 WT-3A satellite cloud receiver is the most prone to failure in high-frequency extension, and the first instability of the primary oscillator is one of the crux of the problem. The local oscillator using a centralized parameter microwave voltage-controlled oscillation circuit, has the advantages of simple structure, easy to start vibration. However, it is susceptible to environmental factors, the frequency drift is large, the frequency adjustment potentiometer not only need to change frequently, and sometimes a wide range of