3-6 VNA Measurements - Distance-To-Fault (DTF)/Fault Location Chapter 3 — Vector Network Analyzer
3-18 MS20xxA VNA Master UG 10580-00166 Rev. C
Fault Resolution
Fault resolution is the ability of the system to separate two closely spaced discontinuities. If
the fault resolution is 10 feet and two faults are 5 feet apart, then the VNA Master will not be
able to show both faults unless Fault Resolution is improved by widening the frequency span.
Figure 3-11. DTF Measurement of Good Cable With a Load
Figure 3-12. DTF Measurement of Cable With a Fault
Fault Resolution (m)
1.5 10
8
× vp×
ΔF
----------------------------------
=
10580-00166C.book Page 18 Thursday, February 21, 2008 12:52 PM
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