For example, connector corrosion can be detected early and weather seals replaced before moisture destroys expensive cables.
DTF finds these problems because the FDR technique can accurately detect very small performance changes within the transmission line.
Many components can cause problems in a communication system.
Transmission lines are typically the most common failure point.
This dual role of predicting future failure conditions and isolating existing problems makes DTF an important part of service and maintenance on transmission lines.
RF failure conditions at the top of a tower or through a bulkhead frequently are not measurable with traditional tools such as TDR and spectrum analyzers with tracking generators.Thus, the actual return loss versus distance is shown in Figure 1. Distance TEST TIP Cable manufacturers specify the propagation velocity (Vp) of cables.Anritsu Handheld products incorporating DTF include tables of many standard cables and waveguides to simplify DTF measurements. If this specification is not available, it can easily be determined by measuring a known length of cable.FDR is a transmission line fault isolation method which precisely identifies signal path degradation for coax and waveguide transmission lines.Although the acronyms are similar, FDR technology is different from traditional Time Domain Reflectometry (TDR) techniques.
The effects of poor connections, damaged cables, or faulty antennas are quickly identified.