Let's find out which pair had a NEXT margin of 1,9 dB:
To better undestand this, let's draw a graph and put the limit line in as red. Then add the region representing the marginal band, shown in yellow. If the worst case margin should fall into this band, it is marked with an asterisk (*). It is important to understand that the width of the band changes with frequency.
Let's put our result above for Pair 3,6-4,5 on this graph:
It just falls within the accuracy band, hence the * on our test result.
Since accuracy is dependent upon frequency, it is possible to have two results with the same margin, but only one of them reported as marginal.
If you are looking for the specific frequency points of the marginal band in the form of tables and graphs, please click here: (13.4MB)