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DVOR VRB-52D设备是多普勒全向信标,主要为飞机提供方位信息。多普勒全向信标工作原理:空间调制,设备分别产生载波、上、下边带信号,它们分别通过不同的天线同时辐射,3个信号在空间合成所需的相位和幅度关系的调幅信号。这调幅过程就实现了“空间调制”。多普勒效应,是上、下边带信号通一定的时序关系辐射各自的信号在空间合成的30HZFM信号。模拟天线,以30HZ频率旋转的运动来辐射信号。(使辐射源与接收点这间有相对运动,在接收点收到的辐射源频率与原频率不同,两频差与辐射源和接收点相对径向运动速度成比例)。DVOR设备的的组成包括5个部分:1.载波通道;2.边带通道;3.监控器;4.电源;5.天线系统:由49根改进型阿尔福特天线组成天线阵,其中边带48根,载波天线1根;还有一条监控天线用于监视设备发射的信号。根据笔者多年参与导航设备维护维修经验,对来宾导航台DVOR(VRB-52D)载波输出功率故障检修调整进行了总结。
The DVOR VRB-52D device is a Doppler omni-directional beacon that provides orientation information primarily for the aircraft. Doppler omnidirectional beacon works: space modulation, the device generates a carrier, respectively, the upper and lower sideband signals, which were simultaneously radiated by different antennas, the three signals in the space required for the phase and amplitude modulation relationship. This amplitude modulation process to achieve “space modulation ”. Doppler effect, is the upper and lower sideband signal through a certain timing relationship of the radiation of the respective signals in the space synthesized 30HZFM signal. Analog antenna to 30HZ frequency rotation of the movement to radiation signal. (To make the relative movement between the radiation source and the receiving point, the frequency of the radiation source received at the receiving point is different from the original frequency, and the two frequency differences are proportional to the relative radial movement speed of the radiation source and the receiving point). DVOR equipment consists of five parts: 1. Carrier channel; 2. Sideband channel; 3. Monitor; 4. Power; 5. Antenna system: consisting of 49 Modified Alfred Antenna antenna array, which sideband 48, a carrier antenna; there is a monitoring antenna used to monitor the signal transmitted by the device. According to the author for many years in the maintenance of navigation equipment maintenance experience, the guest navigation station DVOR (VRB-52D) carrier output power troubleshooting adjustments are summarized.