Fluke DTX Series Technical Reference Handbook page 118

DTX Series CableAnalyzer
Technical Reference Handbook
Propagation delay or delay skew gives FAIL result
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Cable is too long (may need to remove coiled service loops)
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Cable uses different insulation materials on different pairs
Impulse noise is detected
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Electrical devices near the cabling are generating noise pulses.
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There is an active link in the same bundle as the cabling under test.
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Verify that the tester and smart remote are operating correctly. Connect the units together and run an Autotest.
4-8
Table 4-1. Diagnosing Twisted Pair Test Failures (cont.)