3-14 PN: 10580-00343 Rev. H S820E UG
3-5 Distance-To-Fault (DTF) Cable and Antenna Measurements
Distance Resolution
Distance resolution is the ability of the Site Master to separate two closely
spaced discontinuities. If the resolution is 5 meters and two faults are
3 meters apart, then the Site Master will not be able to show both faults until
the resolution is improved by widening the frequency span.
Distance Resolution (m) = 300 x pv / ΔF (MHz)
Figure 3-7 is an example of the same DTF measurement with a 100 MHz
span versus a 500 MHz span. The increased span provides additional detail
that several unique issues may affect the first 10 meters of the cable. This
detail was not available in the narrower span.
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