Motech MT 4080 - Page 47

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H CUR
H POT
L CUR
L POT
Zdut
C o
R s L s
G
o
Z m
Redundant
Impedance
(Z
s )
Parastic
Conductance
(Y
o )
Parastic of the Test Fixture
(a) Parastic Effect of the Test Fixture
H CUR
H POT
L CUR
L POT
C o
R s L s
G
o
(b) OPEN Measurement
Y o
OPEN
Y
o = G o + j £s C o
1
(R
s + j £s << )
G
o +j £s C o
H CUR
H POT
L CUR
L POT
C o
R s L s
G
o
(c) SHORT Measurement
Z s
SHORT
Z s = R s + j £s L s
Figure 3.7