基于PXIe的FC总线测试与协议分析仪设计

Design of FC Bus Test and Protocol Analyzer Based on PXIe

摘要:

光纤通道（FC）以其抗干扰能力强、传输速度快等优点，成为新一代航空电子系统的优选主干网络，针对新型航空电子系统测试保障任务中对FC总线的测试需求，研究并分析了FC总线测试的具体实现方法和途径，设计了一种基于PXIe架构的FC总线测试与协议分析仪。该测试仪充分利用PXIe仪器体积小、可扩展性强、系统带宽大的特点，在一台紧凑型设备中实现了FC节点仿真、数据监听、故障注入、视频监视、光功率测量、时标同步、比特误码率测试等多种功能。经测试验证，证明其支持FC-AE-ASM、FC-AV协议；实现了SOF错误、CRC错误等8种故障注入方式，以及CJTPAT、CRPAT等4种误码率测试码型；支持帧过滤规则256条，通信速率2.125Gbps，光波长850nm、1310nm、1550nm，光功率范围-30dBm~+3dBm。实验结果表明其符合航空电子网络数据传输的实时性和可靠性需求，可应用于FC设备或网络的研发生产、仿真实验、外场保障等测试场景。

Abstract:

Fiber Channel (FC) has become the preferred backbone network for the new generation of avionics systems due to its strong anti-interference ability and fast transmission speed. In response to the testing requirements for FC bus in the testing and support tasks of new avionics systems, the implementation methods and approaches for FC bus testing were studied and analyzed, and a PXIe architecture based FC bus tester was designed. This tester fully utilizes the small size, strong scalability, and large system bandwidth of PXIe instrument. It realizes various functions such as FC node simulation, data monitoring, fault injection, video monitoring, optical power measurement, time synchronization, and bit error rate testing in a compact device. After testing and verification, it has been proven that it supports FC-AE-ASM, FC-AV protocol, implements 8 fault injection methods such as SOF error, CRC error, and supports 4 bit error rate test code types such as CJTPAT and CRPAT. It also supports 256 frame filtering rules, 850nm/1310nm/1550nm light wavelength, and -30dBm~+3dBm Optical power range. The experimental results show that it meets the real-time and reliability requirements of avionics network data transmission, and can be applied in testing scenarios such as research and development, simulation experiments, and field support of FC equipment or networks.