Page.76.
Advanced Test: test cable pair status, length, attenuation, reflectivity, impedance, skew and
other parameter.
Attenuation reflectivity: after link up, if reflectivity value is 0, it is the best quality
communication
Impedance: after link up ,if the impedance value is 100 Ω,it is the best quality communication,
the range is generally in 85-135 Ω
Skew: After 1000M link up, when skew value is 0ns,it is the best quality communication, if over
50ns, will cause a Bit Error Rate in the transmission.
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