JDS Uniphase OneExpert DSL, User Manual

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Chapter 8 Copper Testing
Measuring opens
OneExpert DSL User’s Guide
66
22052280, Revision 001 April 2014
A warning appears during the stress pulse to indicate higher voltage is present.
7 To adjust the Gain or Pulse Width , either drag the line across the bar or touch the + or - key
to adjust it.
Pulse Width only appears when
Pulse Width is selected on the Options pop-up menu (from
the Options system key).
8 To help identify small or distant faults, use the up or down arrow keys to gain the vertical axis
and enhance the reflection of faults. Do not apply excessive gain. This makes a normal condi-
tion appear as a fault.
9 If you want a larger image, you can rotate the screen to Landscape by selecting the Trace
system key and then select Landscape .
10 Using the Peak Hold mode, the OneExpert DSL DSL can display minimum, maximum, and
current TDR traces over a test period. This feature is useful for analyzing faults that occur
intermittently. To enable Peak Hold mode, select the
Options system key and then select
Peak Hold .
11 To save the results to a report, use the Tray menu ( “Saving a report” on page 32 ).
12 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
“Saving results” on page 78 .
13 To learn what your results mean, see “TDR” in Chapter 10 “Test Results” .
Locating cable faults with the TDR is complete.
Measuring opens
The opens feature measures the total electrical (capacitive) length of a pair.
To measure opens
1 Connect the Tip (A), Ring (B), and Ground (Earth) leads to the line under test.
2 From the Copper menu, touch the Opens button.
3 For greatest accuracy, JDSU recommends that you compensate the opens measurement to
remove the effects of the test leads. To compensate the opens measurements
a Swipe downward on the screen to access the Tray menu.
b Select the OPENS Compensation system key
c Follow the instructions on the screen to connect the black, red, and green leads to
perform test lead compensation.
d Touch Compensate .
The compensation stops automatically when finished.
4 Press the Home navigation key to return to the Opens menu.