在电路印制板性能检测与故障诊断中,利用VXI总线模块仪器作为激励信号源,由于转换系统与被测单元间的不匹配,产生信号变形,影响了电路印制板性能的测试。本文针对这一问题进行了讨论,提出了改进措施,给出了实验结果。 In the circuit board performance testing and fault diagnosis, the use of VXI bus module instrument as the excitation signal source, due to the conversion system and the measured cell mismatch, resulting in signal distortion, affecting the circuit board performance testing. This paper discusses this issue, puts forward the improvement measures and gives the experimental results.