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214 Agilent FrameScope 350 User’s Manual
9 Cable Tester Reference
Measurements
Return Loss
Return Loss measures the degradation of signal over all four pairs from
each end of the tested cable run.
Equal Level Far End Crosstalk (ELFEXT)
ELFEXT measures far end coupling between pairs in the tested cable, for
all pair combinations.
Attenuation to Crosstalk Ratio (ACR)
The ratio of the measured attenuation and the near end crosstalk
(NEXT) at each frequency point.
Power Sum NEXT (PSNEXT)
Computed for each pair by calculating a power sum total of the
pair-to-pair NEXT from the three other pairs.
TIA level III measurement parameter and tester accuracy requirements per
TIA Category 6 Draft – Addendum to TIA-568-B and ISO/IEC 61935-1 draft
amendment 1, 10/99
TIA level III measurement parameter and tester accuracy requirements per
TIA Category 6 Draft – Addendum to TIA-568-B and ISO/IEC 61935-1 draft
amendment 1, 10/99