R&S ZVB - Page 392

R&S
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ZVA / R&S
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ZVB / R&S
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ZVT GUI Reference
Channel Menu
Operating Manual 1145.1084.12 – 30 377
 Deembedding at Balanced Port and Embedding at Balanced Port show the 4-port transformation
networks to be numerically added or removed at balanced (logical) ports. Off denotes that no
(de)embedding operation is performed.
 Deembedding at Single Ended Port and Embedding at Single Port show the 2-port transformation
networks to be numerically added or removed at single ended (physical) or balanced (logical)
ports. Off denotes that no (de)embedding operation is performed.
A ground loop cannot be assigned to a logical or physical analyzer port, so ground loop (de-
)embedding is not shown in the Port Overview dialog. The same applies to port pair (de-)embedding which
involves pairs of physical ports.
Combination of Different (De-)Embedding Networks
In the Port Overview dialog, it is possible to select a combination of 4-port and 2-port networks to be
numerically added/removed at balanced (logical) ports, and to select 2-port networks at single ended
(physical) ports. The following example shows the full configuration for a four-port analyzer where the
physical ports 1 and 3 form a balanced port with the logical port no. 1 and the remaining ports 2 and 4 are
single ended.
The port overview configuration above corresponds to the measurement circuits shown in steps 1 to 5
below.
The different steps for deembedding and embedding are carried out in the following order (the figure also
contains possible ground loop and port pair (de-)embedding stages which are not shown in the Port
Overview dialog):
This means that the real networks are removed before virtual networks are added. For a single balanced
port with all single ended and balanced port (de-)embedding networks enabled, the 4 (de-)embedding
steps are carried out in the following order:
1. Initial situation: DUT embedded in 2-port and 4-port networks (only 1 port shown)