浅谈百兆以太网物理层一致性测试之探头选择

Probe Selection for Physical Layer Conformance Testing of 100MEthernet

文章通过对比泰克P6247与TDP3500两款差分探头测试百兆以太网物理层一致性的结果,研究不同差分探头对信号幅值测量的影响。实验发现,不同带宽和不同阻抗曲线的探头在测量时,会对待测信号产生影响,使得测量结果存在较大的差异。因此,在选择差分探头进行百兆以太网物理层一致性测试时,需要综合考虑不同指标的影响,选择合适的差分探头以获得更精准的幅度域测量结果。

This paper investigates the impact of different differential probes,namely Tektronix P6247 and TDP3500,on signal amplitude measurement in order to assess the consistency of 100Mbit Ethernet physical layer.The study reveals that variations in probe bandwidths and impedance curves significantly affect the measured signals,leading to substantial differences in measurement results.Therefore,when selecting a suitable differential probe for conducting physical layer consistency tests on 100Mbit Ethernet,it is crucial to consider various indicators and choose an appropriate probe to ensure more accurate measurements in the amplitude domain.