甚高频全向信标(VOR)/仪表着陆系统(ILS)标准信号源设计

Standard signal source design for VHF omnidirectional beacon /Instrument landing system

甚高频全向信标/仪表着陆系统标准信号源可用于甚高频全向信标/仪表着陆系统机载设备的检测与维修。本文较详细阐述了该标准信号源的设计原理;简要介绍了标准信号源中采用的目前较为先进DSP技术、锁相式多波段频率合成技术、数字式直接频率合成技术(DDS)等7种技术的应用情况;论述了设计过程中遇到的多种低频调制信号的合成、高精度调制度差值的实现等难点问题的解决方法。文中介绍的标准信号源已经小批量推广应用,其使用技术具有一定的借鉴意义。

Standard signal source design for VHF omnidirectional beacon/instrument landing system can be useo to test and maintain equipments for VHF omnidirectional beacon/instrument landing system. This paper introduces in detail design principle of standard source and simply application of advanced technologies which the standard signal source adopts, such as DSP, multiband lock phase integration and digit direct synthesis, discusses the methods of resolving difficulties occurring in process of design, such as LF modulation signals synthesis and high precision modulation difference realizing. This design is applied in practice and its using techniques have significance for other designs.