The installation plays a major role in the PM programme because, in theory, the system should never perform better than the day it was installed. The system should be documented to provide a comprehensive reference for its performance. Figure 1 is a sample of a network evaluation sheet. DC power and RF measurements of the optical components are the only effective means of monitoring the system s condition. Once the system is turned on and operating, the risk of performance degradation is minimal and disruption of the optical path should be the last resort for PM programme monitoring.
Optical systems require monitoring, just as other networks do.
The RF data and DC test points provide all the information required to properly maintain a system. New technologies will make this task easier. Next month CTI looks at rebuilding your cable system. All rights reserved.