Chapter 7
Testing Twisted Pairs
Page 7-19
The following table lists some common causes of Attenuation and
possible solutions.
Common
Causes of
Attenuation
Solutions
Incorrect grade
cable for
application
Be sure to use the correct grade cable for the
specification being tested. Lower grade
cable can cause greater attenuation.
Patch cables
Patch cables may not be twisted pair. A
common mistake is to use untwisted
telephone wire for data applications. Make
sure patch cable is data grade.
Excessive Length
If specification is based on a maximum
length, check length and correct if
necessary.
Poor termination
Check all terminations for proper
connections. Follow troubleshooting tips
mentioned in “Common Problems for
Attenuation.”
Impedance
Anomalies
A splice in the segment or damage to a
segment can cause excess attenuation.
Perform a length test to check for anomalies
in segment.
If anomaly is detected, go to that point and
examine the cable and connections for
kinks, cuts, splices, incorrect cable, sharp
bends or other. Repair as necessary.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com