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It is much less expensive to monitor individual transmission lines for slight degradation and fix the problem early, before serious damage occurs. Transmitter performance is optimized by eliminating poorly performing components. Hand off anomalies are reduced by eliminating ping-ponging between weak/strong base stations.

Preventative maintenance has another set of benefits even more important than cost. Overall quality is improved giving greater customer satisfaction.

This practice may be precipitated by the cable installer, who would likely make the same mistakes on each cable connection.

Antennas and transmission lines used on-board ships and aircraft may be degraded due to salt water corrosion.In a Wireless Communication System, tower mounted transmission lines and cables are replaced frequently, perhaps every five to ten years, in some cases.Usually, all the site’s cables are replaced based upon the assumption that maintenance calls are imminent on other feeds in addition to the problem cable.This dual role of predicting future failure conditions and isolating existing problems makes DTF an important part of service and maintenance on transmission lines.DTF displays RF return loss or VSWR data versus distance.Eventually these problems cause intermittent outage and failures at exactly the times they are least welcome, such as during storms or during extreme periods of cold.With DTF available, the root causes of RF problems can be identified.Many components can cause problems in a communication system.Transmission lines are typically the most common failure point.Distance To Fault (DTF) is a performance verification and failure analysis tool used for antenna and transmission line service and maintenance.It uses the Frequency Domain Reflectometry (FDR) measurement technique.


  1. The Site Master S331E/S361E is a handheld cable and antenna analyzer designed to make. Return Loss, VSWR, Cable Loss, and Distance-To-Fault DTF.

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  3. Site Master™, Cell Master™, VNA Master™. Introduction. Distance To Fault DTF is a performance verification and failure analysis tool used for antenna and.

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