Stressed Balance - SPX RADIODETECTION 6100-Cu Operation Manual

Multifunction phone network analyser and copper tester
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To select the Station Ground parameter values:
1. Press the up/down arrow keys to highlight the
desired parameter.
2. Press the left/right arrow keys to view and
select the options.
OR
3. Press
on a value to open a list box of
options.
4. Press
to confirm the value.
Threshold Settings
The Test Thresholds page allows you to set the
threshold values for the Ground Resistance. The
threshold is a programmable value you can use as an
on-screen indicator in each test when a measured
value is too high or too low.
Type is the threshold limit: either Maximum or
Minimum.
Enabled is a flag to use the current threshold:
either Yes or No.
To set threshold values:
1. Press the up/down arrow keys to highlight the
desired parameter.
2. Press the left/right arrow keys to view and
select the options.
OR
3. Press
on a value to open a list box of
options or the alphanumeric editor screen and
use the navigation keys to scroll through.
4. Press
to confirm the value.
© 2020 Radiodetection Ltd
6100-Cu Multifunction Copper Tester Operation Manual
Result Details
The Result Details read-only page displays the
Station Ground results and the pass/fail status.
Test Group is the overall test group of the
selected saved results file, for example
Multimeter.
Test Identification is the test type of the
group, for example Station Ground.
Test Modes identifies the manner in which the
test was run, for example Snapshot.

9.9 Stressed Balance

Stressed Balance is an optional test that continuously
generates high voltage (135 VDC) to the cable pair
under test while measuring balance. The high voltage
stresses the conductors in order to reveal imbalances
that may otherwise be hidden with the normal VF/AC
Balance test.
The test is very similar to the classic stress test well
known in North America. Compared to the VF
(longitudinal) Balance test, values for the Stressed
Balance test are depicted as follows (but check your
own methods and procedures):
good < 20 dBRNc
marginal = 20 to 30 dBRNc
bad > 30 dBRNc
In general, a pair that stresses < 25 dBRNc is well
balanced for POTS and ADSL internet service.
However, higher speed ADSL2+ and VDSL2 circuits
should stress < 20. A low stress value (> 20) indicates
imbalance on the pair, which can have different causes.
Most common causes are grounds and shorts, but also
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