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Chapter 13 Copper Testing
OneExpert DSL User's Guide
22052280, Rev. 015 April 2019 192
10. If you are testing toward a FED, use the Options menu, then select TDR Helper to
continuously open and short the pair. On a TDR trace, you can then see the end of the
copper pair by watching the open trace (slope up) and the short trace (slope down) that
will flip flop for the amount of time you specify. This allows you to see where the FED is
located.
11. The Options menu has a checkbox for Dual Trace . The Dual Trace TDR runs the TDR
measurements on both primary and secondary pairs (A1 and B1).
12. The Reference menu contains not only the Save and Load options but also the View
modes for the graphs on the screen. View Offset is the default and shows both
traces. View Overlap shows the overlapping traces. View Difference highlights the
differences between the traces.
13. To save the results to a report, use the Tray menu.
14. You can also view and compare current and saved TDR traces using the Results key. For
information on saving your results in graphical form, see “DSL/G.fast Results” on page
282 .
15. 15 To learn what your results mean, see “TDR” in Chapter 15 “Test Results” .
Locating cable faults with the TDR is complete.