The asterisk indicates that the Worst Case NEXT Margin fell within the accuracy of the DTX CableAnalyzer. If that is true, then shouldn't both results above be marked with an asterisk? Not necessarily.
- The accuracy of the DTX CableAnalyzer changes with frequency.
And the compare it to the Worst NEXT Pair for Link 2:
Since Link 2's Worst Case Margin occurred at a lower frequency where the accuracy of the measurement is better, it is not reported as a marginal NEXT.
Need to find out more information on these accuracy bands?