Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

Page: 805 / 813

R&S
®
ZVA/ZVB/ZVT Balanced Measurements
1145.1084.12 9.11 E-4
network inserted between port 1 of the analyzer and the DUT.
You can also assign two-port networks to balanced ports; see Combination of 2-Port and 4-Port
(De-)Embedding Networks.
To remove a real transformation network from a single-ended port...
Suppose that your 2-port DUT has a real, known 2-port transformation network at port 1.
1. Connect the DUT (including the transformation network) between test ports 1 and 2 of the
analyzer so that the transformation network is placed between port 1 of the analyzer and the
DUT.
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 Deembedding to open the Single Port
Deembedding... dialog.
4. In the dialog, select the Physical Port connected to the physical transformation network (e.g.
Physical Port 1) and do one of the following:
5. If your transformation network is described by an imported set of 2-port S-parameters, select
the 2-Port transformation network, click Read Data From File, and load the data from a 2-port
(*.s2p) Touchstone file .
6. If your transformation network can be described 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 Deembed DUT and Close the dialog.
The traces of the active channel show the characteristics of the DUT without the effects of the removed
physical transformation network.
You can also assign two-port networks to balanced ports; see Combination of 2-Port and 4-Port
(De-)Embedding Networks.
To add a virtual transformation network to a balanced port...
Suppose that your DUT has a single-ended and a balanced port and that you want to add a virtual 4-
port network to the balanced port.
1. Connect ports 1 and 3 of a 3- or 4-port analyzer to the balanced ports of the DUT, connect port
2 to the single ended port of the DUT.
2. Click Channel – Mode – Port Config... – Balanced and Measured Ports... Predefined Configs
and define the appropriate balanced port configuration (see also Balanced Measurement
Examples) , combining ports 1 and 3 of the analyzer to logical port no. 1.
3. Establish the necessary Channel settings (sweep range and type etc.) and select the measured
quantities (Trace – Measure).
4. Click Channel – Mode – Virtual Transform – Balanced Port Embedding to open the Balanced
Port Embedding... dialog.
In the dialog, the Logical Port no. 1 (the only balanced port) is already selected. To add a virtual
network, do one of the following:
5. If you wish to define the added network by an imported set of 4-port S-parameters, select the 4-
Port transformation network, click Read Data From File, and load the parameters from a 4-port