3-16 PN: 10580-00321 Rev. M S331L UG
3-4 Line Sweep Measurements Cable and Antenna Measurements
Distance Resolution
Distance resolution is the Site Master’s ability to separate two closely
spaced discontinuities. If the resolution is 5 meters and there are two
faults 3 meters apart, 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 3-12 is an example of the same DTF measurement with a
100 MHz span vs. a 500 MHz span. The increased span provides
additional detail that there may be several unique issues with the first
10 meters of the cable. This detail was not available in the narrower
span.
Figure 3-12. DTF Measurements at 100 MHz vs. 500 MHz
500 MHz Span
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