Chapter 3
Structured Cable Field Calibration and Testing
3-14
3.
When finished, press ESCAPE to return to the Autotest screen.
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 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 the Analyze Testing section to run these tests.
WARNING SCREENS
In response to a change in parameter(s), failure, harmful condition, or operational
limitation, the tester will display a warning screen advising you of the activity or
request you are engaged in. The screen will prompt you to YES (continue) or NO
(exit).
Figure 3-4: Sample Warning Screen
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