Getting Started
Rotary Switch
2
2-27
Autotest
Autotest is the most frequently used function in LAN cable testing. Autotest
performs all of the tests necessary to qualify the cabling you are testing. When the
Autotest is complete, the tests that were run are listed with the overall result for
each test. You can also view detailed results for each test. Results from Autotests
can be saved for printing or transmission to a host computer.
The following tests apply to twisted pair cabling:
Note
The tests run during an Autotest on twisted pair cabling depend on
the test standard selected. Tests not applicable to the selected test
standard are not run or displayed. For a list of the tests and limits
associated with common standards, see the document provided on
the Fluke Networks website at www.flukenetworks.com.
• Headroom: Reports the worst-case margin for a parameter determined by
selected test standard. This may be NEXT, ACR, PSNEXT, or another
measurement.
• Wire Map: Tests for opens, shorts, crossed pairs, reversed wires, and split
pairs.
• NEXT and ELFEXT: Tests twisted pair cabling for near-end crosstalk
(NEXT) and equal level far-end crosstalk (ELFEXT).
• Length: Displays the length of twisted pairs in feet or meters.
• Propagation Delay: Measures the times taken for a signal to travel the length
of each cable pair.
• Delay Skew: Calculates the differences in propagation delays between the
cable pairs.
• Impedance: Measures the impedance of each cable pair. If impedance
anomalies are detected, the test reports the largest anomaly detected on each
cable pair.
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