Measuring Longitudinal Balance - Viavi OneExpert DSL User Manual

5 For greatest accuracy, Viavi recommends that you compensate the
opens measurement to remove the effects of the test leads. To
compensate the opens measurements
a
b
c
d
6 Press the back navigation key to return to the Opens menu.
7 Do one of the following:
–
–
8 To save the results to a report, use the Tray menu
on page
9 To learn what your results mean, see
Chapter 14 "Test Results"
You have measured Opens.

Measuring longitudinal balance

Balance is a number representing the quality of the telephone circuit and
the degree to which the Tip (A) and Ring (B) conductors are electrically the
same in their ability to cancel noise. The balance measurement is used to
identify poor loop quality or cable bonding and grounding issues that allow
excessive loop noise. Wideband background noise is covered in the
WBTIMS section.
November 2015
Swipe downward on the screen to access the Tray menu.
Select the Compensate OPENS system key
Follow the instructions on the screen to disconnect all test leads
to perform test lead compensation.
Touch Compensate.
The compensation stops automatically when finished.
If you are on the Snapshot menu, select Refresh to restart the
test.
If you are on the Continuous menu, select Clear to restart the
test.
49).
OneExpert DSL User's Guide
"Opens/Capacitance"
22052280, Rev 006
Chapter 12 Copper Testing

Measuring longitudinal balance

("Saving a report"
in
Page 159