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Touchstone Data File Definition
When defined in the 4-port Touchstone data file, a 4-port network assumes
that ports 1 and 2 are connected to the analyzer and that ports 3 and 4 are
connected to the DUT.
When defined in the 6-port Touchstone data file, a 6-port network assumes
that ports 1, 2 and 3 are connected to the analyzer and that ports 4, 5 and
6 are connected to the DUT.
When defined in the 8-port Touchstone data file, a 8-port network assumes
that ports 1 to 4 are connected to the analyzer and that ports 5 to 8 are
connected to the DUT.
Topology Selection
For measuring a 4-port DUT with a 4-port network embed/de-embed only
on one side, select topology C instead of A, set embedding/de-embedding
on the desired side, and specify no processing (None) on the other side.
For measuring a 3-port DUT with a 4-port network embed/de-embed on
one side and a 2-port network on the other side, select topology B instead
of A, embed/de-embed a 4-port network on one side, and embed/de-
embed a 2-port network on the other side using the 2-port matching circuit
embedding feature or the 2-port network de-embedding feature. Selecting
topology A will result in unexpected measurement.
Procedure
1. Prepare a 4/6/8-port touchstone data file (.s4p/.s6p/.s8p format)
corresponding to a network you want to embed/de-embed.
2. Press Analysis key.
3. Click Fixture Simulator > De-Embedding SnP > Topology > Select
Topology.
4. Select a network connection type (topology) from A, B, or C.
5. Click Ports to select measurement port numbers of the analyzer to
which you want to connect ports 1 and 2 of the 4-port network.
• For topology A: Select measurement port numbers of the
analyzer to which you want to connect nwk1-1 and nwk1-2.
For example, when you connect nwk1-1 and nwk1-2 to
measurement ports 1 and 2, respectively, specify Ports ="1-2".
• For topology B: Select measurement port numbers of the
analyzer to which you want to connect nwk3-1, nwk3-2, and
nwk3-3. For example, when you connect nwk3-1, nwk3-2, and
nwk3-3 to measurement ports 1, 2, and 3, respectively, specify
Ports="1-2-3".
• For topology C: Select measurement port numbers of the
analyzer to which you want to connect nwk4-1, nwk4-2, nwk4-
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