FEXT


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FEXT

(Far End Cross(X) Talk) A measurement of crosstalk between two wire pairs taken at the far end of the line. See ELFEXT and NEXT.
References in periodicals archive ?
The FEXT crosstalk signal is created in a similar manner as the NEXT crosstalk signal (its spectrum is presented on fig.
This 20% FEXT noise, spread over the unit interval, can completely close a marginally acceptable eye, as in Figure 1.
Therefore FEXT represents the dominant source of disturbance in current digital transmission systems, such as xDSL (VDSL2) lines [2].
The NEXT and FEXT figures of merit are used to describe the relative peak noise compared to the signal.
A study of far-end crosstalk (FEXT) and crosstalk-induced jitter involving two edge-coupled differential pairs of W = 5 mil and interapair separation Sp = 5 mil, revealed that increasing the pair-to-pair spacing Sn from 5 mils to 20 mils can significantly reduce FEXT (16) and deterministic jitter (D J).
1000Base-T modeling on CAT 5 cabling has shown that ISI will be 104mV rms or approximately two orders of magnitude greater than NEXT and FEXT at the input of the receiver (Source: Sailesh Rao, Level One Communications.