Fluke CableAnalyzer DSX-5000, Technical Reference Handbook, Page: 226 / 700

Versiv Series Cabling Certification Product Family
Technical Reference Handbook
190
Insertion loss gives a FAIL, FAIL*, or PASS* result

Link is too long (may need to remove coiled service loops)

Poor quality patch cord

Bad connection (possibly shows insertion loss failure on only one or two
pairs)

Wrong cable type in the installation

Wrong test standard selected

Wet lubricant in a conduit with unshielded cable. Possibly, the test will
pass after the lubricant dries.
Characteristic impedance exceeds the limit or an anomaly is detected

Bad connection

Cable compression (tight cable ties, pinches, kinks, etc.)

Mismatch of cable types

Water in the cable jacket
Return loss gives a FAIL, FAIL*, or PASS* result

Patch cord or cable impedance not 100


Patch cord handling causing changes in impedance

Excessive amount of cable jammed into outlet box

Tight service loops in telecommunications closet

Excessive untwisting of pairs at connector

Poor quality connectors

Cable impedance not uniform (poor quality cable)
Table 8. Causes of Twisted Pair Test Failures (continued)