Frequency Tests
210
MAX-635G
VF/AC Balance
3.
The test will start automatically if the
Setup
/
Application
Settings
/
General
-
Test Startup Mode
is set to
Auto
. If not, press
Start/Stop on the keypad.
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.
Summary of Contents for MAX-635G
Page 1: ...User Guide Copper and G fast VDSL2 ADSL2 Multi play Test Set MAX 635G www EXFO com ...
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Page 270: ...TDR 260 MAX 635G Continuous Examples of Common Faults Short Fault ...
Page 271: ...TDR Copper and G fast VDSL2 ADSL2 Multi play Test Set 261 Continuous Open ...
Page 272: ...TDR 262 MAX 635G Continuous Bridged Tap ...
Page 273: ...TDR Copper and G fast VDSL2 ADSL2 Multi play Test Set 263 Continuous Splice Joint ...
Page 274: ...TDR 264 MAX 635G Continuous Peak Function ...
Page 275: ...TDR Copper and G fast VDSL2 ADSL2 Multi play Test Set 265 Continuous Dual Trace View ...
Page 276: ...TDR 266 MAX 635G Continuous Load Coil ...
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