Fluke DTX-1800 Technical Reference Handbook page 150

DTX Series CableAnalyzer
Technical Reference Handbook
NEXT, PS NEXT, ACR-F, PS ACR-F gives FAIL, FAIL*, or PASS* result
•
Excessive untwisting of pairs at connector
•
Poor quality patch cords
•
Poor quality connectors
•
Poor quality cable
•
Poorly matched plug and jack (6A/Class E
•
Incorrect link interface adapter
•
Cable compression (tight cable ties, pinches, kinks, etc.)
•
Inappropriate use of couplers
•
Excessive noise source near cabling under test. Use the
impulse noise test to check for noise.
•
Wrong test standard selected
Impulse noise is detected
•
Electrical devices near the cabling are generating noise pulses.
•
There is an active link in the same bundle as the cabling under test.
•
Verify that the tester and smart remote are operating correctly. Connect the units together and run an Autotest.
6-6
Table 6-1. Diagnosing Twisted Pair Test Failures (cont.)
applications)
A
Fixing NEXT problems usually corrects ACR-F
problems.
Tip: The HDTDX test in Single Test mode features a
scanning function that runs the HDTDX test
continuously. This function can be helpful for locating
crosstalk faults caused by cable compression and noise
sources. See page 6-7.
Note