Chapter 7
Cable Testing Fundamentals
7-7
•
Any combination of up to three opens, shorts, or cross-connections will be
correctly identified.
•
Opens and shorts will provide an indication of the cable end that the error
occurred on (provided by Length screen results in Autotest.).
•
Split pairs will be identified based on specific patterns of inconsistent NEXT
(Near-End Crosstalk).
Troubleshooting Wiremap Problems
Problem: One or more open pins
Probable Causes
Connector-to-wire punch down not mated
Defective jack or plug.
Broken wire(s).
Other Tests Affected
Test
Possible Result
DC Resistance
Fail.
Attenuation
Fail.
NEXT
Some false measurements.
Mutual Capacitance
0 reading possible.
Length
May be low if the open is near the
Display Handset.
Problem: Shorted pins
Probable Causes
Conductors making contact at a connector.
Jack or plug has pin or circuit defect.
Cable damaged.
Other Tests Affected
Test
Possible Result
DC Resistance
Low or zero.
Attenuation
Fail.
NEXT
Some false measurements.
Capacitance
Over limit.
Length
Reduced or shorted pairs.
Summary of Contents for LANTEK
Page 80: ...Chapter 3 Calibration Configuration and Special Operations 3 39 store up to 10 custom cables ...
Page 116: ...Chapter 4 Autotesting 4 24 ...
Page 124: ...Chapter 5 Analyze Testing 5 8 ...
Page 172: ...Chapter 6 Using LANTEK REPORTER 6 48 ...
Page 208: ...Appendix A Safety Precautions A 4 ...