Connecting To The Line; Measuring Longitudinal Balance - JDS Uniphase HST-3000 User Manual

Chapter 4 Measuring PI and Noise

Connecting to the line

Connecting to the line

Measuring longitudinal balance

28
Before running the test, connect the test leads to the line
under test.
– Connect the Tip (A), Ring (B), and Ground (Earth) leads
to the line under test.
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.
To measure longitudinal balance
1 From the Copper Measurements menu (see
press the 3 key.
The Longitudinal Balance menu appears.
HST-3000 Copper Testing User's Guide
page 8),