Brief
Measurement
Theory
The
permeability
measurement
signal
ow
is
shown
in
Figure
5-1.
The
analyzer
can
measure
relative
permeability
for
a
toroidal
shape
magnetic
material.
Figure
5-1.
Magnetic
Material
Measurement
The
analyzer
calculates
the
relative
permeability
from
the
impedance
.
The
calculation
formula
is:
_
=
_
Z
m
j
!
o
2
h
ln
b
c
+
1
Where
,
_
relative
permeability
_
Z
m
measured
impedance
o
permeability
of
free
space
h
height
of
MUT
(Material
Under
T
est)
b
outer
diameter
of
MUT
c
inner
diameter
of
MUT
5-2
Magnetic
Material
Measurement
Quick
Start
Содержание 4291B
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