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Page.76.
Cable quality test:
Green is good quality cable, Yellow is poor quality cable, Red is water poured
cable, while the attenuation value will be displayed when cable over 10 meters.
Advanced Test:
tests cable pair status, length, attenuation, reflectivity, impedance, skew and other
parameters.
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,
it will cause a Bit Error Rate in the transmission.
Содержание 72-13160
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