Chapter
13 Copper Testing
OneExpert DSL User's Guide
22052280, Rev. 015
April 2019
200
The OneExpert DSL assumes that the fault is on the red lead. If the fault is not on
the red lead, it will automatically flip Tip (A) and Ring (B) and run the test again.
Thus, your screen may show swapped leads.
3. To save the results to a report, use the Tray menu.
4. To learn what your results mean, see
“RFL” in Chapter 15 “Test Results”
.
Locating a cable fault using the RFL is complete.
Measuring spectral noise
With the spectral test, the OneExpert DSL can detect and measure the existence of noise
interference.
1. Connect the Tip (A), Ring (B), and Ground (Earth) leads to the line under test.
2. From the Copper menu, press
Spectral
. The spectral noise graph appears.
3. To specify a technology, press
Technology
and then do the following:
• Select a technology from the list.
• Specify a custom technology. Select
Custom
and then specify the range and
termination.
4. To zoom in, press the magnifying glass and then use the arrows on the screen to zoom
on the x-axis or y-axis. You can also zoom using the arrow keys.
5. To zoom out, do one of the following:
• Press
Options
an then select
Pull Back
.
• Use the arrows on the screen or the arrow keys The graph in the lower area
shows the world view.
6. To change the scale of the y-axis, press
Options
an then select a scale:
dBm dBrn
, or
dBm/Hz
.
7. To use an external bridge, press
Options
and then select the checkbox for
Use External
Bridge
.
8. To use the trace as a reference, press
Options
and then select
Set Reference
.
The reference trace is superimposed on the current trace.
Compare the traces to troubleshoot anomalies such as impulse noise or large noise
9. To superimpose a spectral mask for a specific technology, do the following:
• Press
Options
and then select
Spectral PSD Mask
.
• Select a technology.
10. To save the results to a report, use the Tray menu.
11. To learn what your results mean, see
“Spectral” in Chapter 15 “Test Results”
.
Spectral analysis is complete.
Summary of Contents for OneExpert DSL ONX-580
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Page 6: ...OneExpert DSL User s Guide 22052280 Rev 015 April 2019 vi ...
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Page 224: ...Chapter 13 Copper Testing OneExpert DSL User s Guide 22052280 Rev 015 April 2019 224 ...
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