Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

Page: 804 / 813

Balanced Measurements R&S
®
ZVA/ZVB/ZVT
1145.1084.12 9.10 E-4
4. Select Logical Port # 2 and assign the two remaining Physical Port Numbers, e.g. 3 and 4.
5. Assign the appropriate differential and common mode reference impedances to logical port no.
2 and Click Define .
The Def Balanced Port tab shows the balanced port configuration:
6. Connect one balanced port of your DUT to ports 1 and 2 of the network analyzer, the other
balanced port of your DUT to ports 3 and 4 of the network analyzer, in accordance with the
selected reference impedances.
7. Click OK to close the Balanced and Measured Ports dialog .
8. Back in the More S-Parameters dialog, select the balanced S-parameter that you wish to
measure.
9. Click OK to close the More S-Parameters dialog and perform the measurement .
Network (De-)embedding
The Virtual Transform menu provides the functions for network embedding and deembedding. The
following examples show how to use the functions.
To add a virtual transformation network to a single-ended port...
Suppose that your DUT is a 2-port DUT with single ended ports.
1. Connect the DUT to your analyzer: For a two-port measurement, connect the DUT between test
ports 1 and 2 of the analyzer.
2. Establish the necessary Channel settings (port configuration, sweep range and type etc.) and
select the measured quantities (Trace – Measure).
3. Click Channel – Mode – Virtual Transform – Single Port Embedding to open the Single Port
Embedding... dialog.
4. In the dialog, select the Physical Port to which you want to add a virtual transformation network
(e.g. Physical Port 1) and do one of the following:
5. If you wish to define the added network by an imported set of 2-port S-parameters, select the 2-
Port transformation network, click Read Data From File, and load the parameters from a 2-port
(*.s2p) Touchstone file .
6. If you wish to define the added network by an equivalent circuit, select the circuit type and
adjust the parameters R, C, and L displayed in the right half of the dialog.
7. Click Embed DUT and Close the dialog.
The traces of the active channel show the characteristics of the DUT including the virtual transformation