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Fluke DSP-4000 Manual

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DSP-4000 Series
Users Manual
4-6
The HDTDX Analyzer
The HDTDX (High-Definition Time Domain Crosstalk) analyzer displays the
locations where crosstalk occurs on the cabling under test. The HDTDX test uses
very short (2 ns) test pulses, which help the test tool resolve smaller crosstalk
problems, resulting in more accurate distance-to-fault measurements and better
definition of faults on plots. The test is run from both ends of the cabling to help
you identify crosstalk sources across the entire link length. You can view the test
results in a list or plot format. The list format shows the largest crosstalk value
detected on the cabling. The plot shows all of the crosstalk detected.
The crosstalk values displayed are adjusted to compensate for cable attenuation.
The values represent the approximate levels of crosstalk as they appear at the
sources of the crosstalk. If the crosstalk magnitude is near 50 %, you can expect
the NEXT test to fail.
The HDTDX analyzer results are not intended for use in determining if cabling
meets specifications; the results are intended to help you locate the sources of
crosstalk on cabling. To determine if cabling meets specifications for crosstalk,
run the NEXT test.
Running the HDTDX Analyzer
Note
You can run the HDTDX analyzer with or without a remote. If you
run the analyzer without a remote, the results will be less reliable.
To run the HDTDX analyzer, proceed as follows:
1. Attach twisted pair link interface adapters to the remote and main units.
2. If you are testing with a remote, turn on the remote; then connect the remote to
the far end of the cable link.
3. Turn the rotary switch on the main unit to SINGLE TEST.
4. Verify that the test standard and cable type displayed are correct.
5. Connect the test tool to the near end of the cable link.
6. Press E to run the HDTDX analyzer.
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