Anritsu MS2024B - Appendix A-Formulas; Propagation

A-1 Vector Network Analyzer Formulas Formulas
A-2 PN: 10580-00289 Rev. K Vector Network Analyzer MG
Propagation
Propagation is the propagation velocity expressed as a ratio to the speed of light.
Cable Loss
Fault Resolution
Fault resolution (in the distance domain) is the ability of the system to separate two
closely-spaced discontinuities. Calculations for distance utilize the speed of light (c), which is
2.99792458 ×10
8
meters per second (for light in vacuum). F is frequency (in Hertz).
Maximum Horizontal Distance
D
max
is the maximum horizontal distance that can be analyzed in DTF.
Suggested Span
Suggested Span is the span needed to get Max Distance to equal Stop Distance.
Propagation Constant vp
1
ε
------==
where: 0 v 1<≤
Cable Loss
Return Loss (dB)
2
-----------------------------------------------=
Cable Loss Average
Peak Valley+()
2
---------------------------------------------=
Fault Resolution Round-Trip (m)
0.5 c
× vp×
ΔF
-------------------------------=
Fault Resolution One-Way (m)
cvp×
ΔF
---------------=
D
max m()
Datapoints 1–()Fault Resolution×=
Suggested Span Round-Trip (Hz)
Datapoints 1–()
0.5 cvp×××
Stop Distance
-----------------------------------------------------------------------------------=
Suggested Span One-Way (Hz)
Datapoints 1–()c
vp××
Stop Distance
--------------------------------------------------------------------=