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Chapter 13 Copper Testing
OneExpert DSL User's Guide
22052280, Rev. 015 April 2019 204
Impulse noise capture
Impulse capture works like an oscilloscope. It provides a graphic display of the signal.
1. Connect the Tip (A) and Ring (B) leads to the line under test.
2. Select
Mode , and then select Impulse Noise Capture . The Wideband Impulse Noise
Capture menu 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 termination
and filter.
4. To specify the view, press Options and then select Time or Frequency .
5. To specify the duration, press Options and then select Single Capture or a
Continuous Capture .
6. To specify the noise threshold, press Options and then select Trigger Threshold .
When this value is exceeded, an impulse noise event is be registered.
7. To specify a Capture Trigger, press Options and then select Capture Display .
This specifies the samples to capture relative to the impulse event detection: 10%
(before), 50% (during), or 90% (after).
8. To specify dead time, press Options and then select Dead Time . This is how long
the OneExpert DSL will wait before attempting to detect the next impulse event.
9. To use an external bridge, press Options and then select the checkbox for Use
External Bridge .
As soon as the signal crosses the selected threshold, a time-domain graph will be
displayed showing ±10 μs of when the impulse occurred.
10. Use the Zoom or Pan button to view specific sections of the graph.
11. To save the results to a report, use the Tray menu.
You have completed the procedure.