3-10 PN: 10580-00343 Rev. H S820E UG
3-5 Distance-To-Fault (DTF) Cable and Antenna Measurements
Using DTF Aid
Because of the nature of the measurement, maximum distance range and
distance resolution is dependent upon the frequency range and number of
data points. DTF Aid (Freq/Distance > Distance > DTF Aid) shown in
Figure 3-5 explains how the parameters are related.
If the cable or waveguide is longer than the Max Usable Distance displayed,
then the only way to improve the horizontal range is to reduce the frequency
span or to increase the number of data points. Similarly, the distance
resolution is inversely proportional to the frequency range and the only way
to improve the distance resolution is to widen the frequency span.
Figure 3-5. DTF Aid
Note
When determining the frequency range, consider all in-line
frequency selective devices.
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