Chapter 4
Autotesting
4-13
Understanding Test Failures
A failure result for Autotest indicates that one or more tests did not meet minimum
cable parameter levels for the cable type selected.
Note: Be sure that you have selected the correct cable type and are using appropriate
connectors and links.
Identifying which tests failed and the characteristics of the failure will determine
the type of fault. If the Autotest shows a failure on a particular sub-test, perform
Analyze testing (see Chapter 5) for the failing test in order to troubleshoot the
cable.
When more than one test fails on Autotest, the test order used for troubleshooting
is an important element in eliminating the source of the problem.
If any tests fail, Analyze tests should be performed in the following order:
1. Wire Map
2. DC Resistance
3. Length
4. Delay and Skew
5. Impedance
6. Attenuation
7. NEXT
8. Dual Return loss
Refer to Chapter 5, Analyze Testing to run these tests.
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