Diagnosing Fiber Cabling Faults
Diagnosing Failures 7
7-3
Table 7-2. Diagnosing Fiber Test Failures (cont.)
Loss is negative.
• The fiber ends were dirty during referencing.
• The connections to the tester were disturbed after referencing.
• There was a kink in a reference patch cord during referencing.
• The connectors were not properly aligned during referencing.
• The testers were much colder during referencing than during testing.
• Some other problem caused a bad reference value.
If loss is negative, set the reference again and retest the cabling.
A known length of cable measures too long or too short.
• The wrong fiber type is selected on the Fiber Setup menu
• The index of refraction needs adjustment. Change n on the Fiber Setup menu
-continued-
To Next Page
Loading...
