Frequency Tests
174
MAX-610
VF/AC Balance
VF/AC Balance
The VF/AC Balance test allows you to check that the VF longitudinal
balance ratio for the twisted pair complies with applicable standards so as
to reduce the effects of common-mode voltage to ground. The test is a
measurement of how much the T/A leg is like the R/B leg in electrical
characteristics, measured by how much noise the line can mitigate (in dB).
It is an overall health indicator and a quick way to tell if the line is in good
condition. The better the longitudinal balance of the cable pair, the higher
the dB reading.
The name of the frequency test depends on the selected
Standard
:
ANSI
:
VF Balance
ITU
:
AC Balance
Active
The
Active
function takes a balance measurement,
displaying and updating results in
real time
, until you
stop the test. The last valid results then remain
displayed.
Current Group
is the current test group name, for
example
Frequency Tests
.
Current Test
displays the test being measured.
Here you can switch to another test from the given
list. However, this action will terminate the
ongoing measurement test.
Threshold Settings
button opens a new page that
allows you to set the
VF/AC Balance
threshold.
Result
displays the pass/fail status and
Active
VF/AC Balance
value.
Test Status
displays the current state of measurement or an error
message.
