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为了解决航空电子全双工交换式以太网(AFDX)总线仿真器在100M工作模式下的校准问题,提出AFDX总线仿真器100M数据发送端和接收端的校准项目和校准方法。发送端校准项目包括差分信号幅度、上升时间、下降时间、波形过冲、占空比失真、发送抖动和回波损耗等;接收端校准项目包括共模抑制和回波损耗;校准方法采用直接测量法,通过标准设备完成AFDX总线仿真器的量值溯源。对开展AFDX仿真器的周期校准具有指导意义。
In order to solve the calibration problem of Avionics full-duplex switched Ethernet (AFDX) bus simulator in 100M working mode, a calibration project and calibration method of AFDX bus simulator 100M data transmitter and receiver are proposed. Transmitter calibration items include differential signal amplitude, rise time, fall time, waveform overshoot, duty cycle distortion, transmit jitter and return loss, etc .; receiver calibration items include common mode rejection and return loss; calibration method using direct measurement Method, through the standard equipment to complete AFDX bus simulator traceability. It is instructive to carry out periodic calibration of AFDX simulator.