FEXT and NEXT analysis for VDSL2 technology on 50 twisted pairs TM copper cable

摘要

This paper presents the crosstalk measurement result of 50 twisted pairs for fully filled type of copper cable bundle with different length i.e. 100 meters, 200 meters and 300 meters. This cable is being used by Telekom Malaysia (TM) to provide DSL technology in Malaysia. The frequencies range in this measurement was from 0.1MHz until 30MHz and this range was selected in order to model this measurement in VDSL2 environment. The result of this measurement was analyzed after scattering parameters was extracted by using Agilent Technologies Network Analyzer model E5071C. The outcome of this experiment is the relationship between the crosstalk and the length of the twisted pair inside a copper bundle. The result shows that crosstalk transfer function remains the same as the length of the cable increases and it represents TM copper cable better compared to ETSI model. The crosstalk transfer function generated from the analysis can be used to estimate bitrate performance according to the length of copper pair.