Rohde & Schwarz 1332.4500.22, Руководство пользователя

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Concepts and Features
R&S
®
ZNA
179 User Manual 1178.6462.02 ─ 12
5.6.2.6 Port Set De-/Embedding
The port set de-/embedding feature allows de-/embedding a linear 2m-port network
connecting m physical VNA ports to m physical DUT ports (m
≥
2).
S
N
VNA S
1 1 2 1
a
E1
b
E1
a
1
b
1
3 2 4 2
a
E2
b
E2
a
2
b
2
2m-1 m 2m m
a
Em
b
Em
a
m
b
m
.
.
.
.
.
.
a
m+1
b
m+1
m+1 m+1
.
.
.
a
n
b
n
n n
Embedding Network DUT Network Analyzer
S
E
Figure 5-9: Port Set De-/Embedding
As shown in section Combining Several De-/Embedding Networks , port set deembed-
ding is calculated after single-ended deembedding, and the port set embedding step
precedes single ended embedding. It is possible to combine a sequence of port sets
for deembedding (embedding), each port set having its own transformation network.
The effect of port set de-/embedding depends on the port sets themselves but also on
their order. The same physical ports can be used repeatedly in different port sets; it is
also possible to use the same port set repeatedly.
Offset Parameters and De-/Embedding