根据IEC 61000-4-5, Chapter 6 "The 10/700 us combination wave generator is used to test ports intended for connection to symmetrical communication lines. The 1.2/50 us combination wave generator is used in all other cases, and in particular, for testing ports intended for power lines and short-distance signal connections."
"对于连接到对称通信线的端口,应使用10/700 us组合波发生器。对于其他情况汇报,特别是连接到电源线和短距离信号互连线的端口,应使用1.2/50 us组合波发生器。"
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其实POE的具体端口是采用什么样的波形,要看其在实际使用中的最大长度,如果超过10m则应该采用10/700. |