关键词: 天线测试转台, EtherCAT 总线, 远距离无线通讯

Abstract: In order to meet the long-distance test requirement of outdoor antenna, a control method on open antenna test turntable is put forward. The antenna test system is composed of the PC test subsystem, the launch turntable subsystem and the receiving turntable subsystem. The remote communication between every subsystem is realized by wireless bridges. EtherCAT bus is put into use in turntable servo control because of its simple wiring form, easily to expand, fast speed of communication and low cost. Furthermore, TwinCAT and LabVIEW are used to program to develop the turntable controlling software. This paper introduces the control method of the servo system and the communication, analyze the positional accuracy and identify this antenna test system could satisfied all the needs by professional test.

Key words: Antenna test turntable, EtherCAT bus, Long-distance wireless communication