6-2 Option 100 Fault Location and SRL
Making Impedance Measurements
The impedance of a cable under test can be displayed by selecting
. The impedance
can be displayed versus distance (for fault location measurements), or
versus frequency (for reflection measurements).
The measured reflection coefficient is used to compute the impedance.
The analyzer uses the formula
where Γ = measured complex reflection coefficient and
where Z
sys
= 50 or 75 Ω
When the complex reflection coefficient, Γ, is zero, there are no reflections
and the cable under test will be exactly the same impedance as the
system impedance, Z
sys
.
NOTE The procedures and illustrations in this manual assume the use of an
Agilent Technologies 8712ET or 8714ET. If you are using an Agilent
Technologies 8712ES or 8714ES, some key presses and displays will be
slightly different.
FORMAT
ZZ
sys
1 Γ+()
1 Γ–()
-----------------
⋅=
To Next Page
Loading...
Need help?
General
