Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

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R&S
®
ZVA/ZVB/ZVT Balanced Measurements
1145.1084.12 9.9 E-4
4. Click Trace – Measure and select an S-Parameter or a Ratio to be measured.
5. Click Trace – Format and ensure that the trace format is dB Mag .
6. Click Trace Funct – Trace Statistics – Compression Point to activate the compression point
evaluation.
A marker is placed to the compression point. To refine the measurement, you can vary the
Compression Value and the Evaluation Range in the Trace Statistics submenu .
Balanced Measurements
The Balanced and Measured Ports dialog comprises the functions for balanced port definition. The
following examples show how to define and use balanced ports.
To perform a balanced measurement...
The following example shows how to perform S-parameter measurements on a 2-port DUT with
balanced input and balanced output using a 4-port network analyzer. You can either use a predefined
port configuration with fixed port assignments or define your own port configuration.
To use a predefined port configuration,
1. Click Trace – Measure – More S-Params... – Balanced and Measured Ports....
2. In the Predefined Configs tab of the Balanced and Measured Ports dialog opened, select the
port configuration that is suitable for your DUT.
3. Open the Def Balanced Port tab and assign the appropriate differential and common mode
reference impedances to both logical ports.
4. Connect your DUT to ports 1 to 4 of the network analyzer as shown in the figure above.
5. Click OK to close the Balanced and Measured Ports dialog .
6. Back in the More S-Parameters dialog, select the balanced S-parameter that you wish to
measure.
7. Click OK to close the More S-Parameters dialog and perform the measurement .
You can also access all the described settings from the Measurement Wizard.
To use your own port configuration,
1. Click Trace – Measure – More S-Params... – Balanced and Measured Ports....
2. In the Def Balanced Port tab of the Balanced and Measured Ports dialog opened, select Logical
Port # 1 and assign two Physical Port Numbers, e.g. 1 and 2.
3. Assign the appropriate differential and common mode reference impedances to logical port no.
1 and Click Define .