通用航管二次雷达功放模块自动测试系统研制

Development of General Automatic Test System for Power Amplifier Modules of Secondary Radar 

摘要:

航管二次雷达的性能直接关系到航空飞行安全。高功率模块的测试尤需谨慎；研制通用的航管二次雷达功放模块自动测试系统可提高保障能力,降低保障成本；系统采用PXIe、LXI/LAN、GPIB混合总线技术,以PXIe嵌入式PC控制器为控制中枢,以“测试盒组”为测试中枢,经适配器实现PXIe板卡、仪表与被测单元的适配,实现多品类功放模块的测试；文章从测试需求、仪表选择、TPS开发平台、系统结构等方面阐述了系统总体设计,提出了基于频谱分析仪的插入相位测试方法,并着重分析了系统在测试盒组、适配器和自动校准补偿三方面的通用性设计；系统可实现大功率范围的激励、测试及校准,省去对昂贵的矢量网络分析仪的配置,测试精度高,经济效益显著。

Abstract:

Performance of secondary radar has intimate relationship with safe flights. Special attentions are needed while testing high power modules. Developing general automatic test system for power amplifier modules of secondary radar can raise maintenance abilities and reduce maintenance costs. The system is able to test many kinds of power amplifier modules based on mixed PXIe, LXI/LAN and GPIB buses. It uses PXIe embedded PC as control center, uses the ‘test boxes’ as testing center, and realizes adaptations between UUT and PXIe cards and instruments through adaptor. This paper states general system designs from aspects of test requirements, choice of instruments, TPS developing environment and system structures, brings forward a testing method of insertion phase based on spectrum analyser, and analyses general designs on test boxes, adaptor and automatic calibration compensation. The system can realize wide power range of stimulation, test and calibration, reduce configuration of expensive vector network analyser, and has high test precisions and notable economic benefits.