Analysis Using Fixture Simulator

• Overview

• Matching Circuit Embedding

• Port Impedance Conversion

• Network De-embedding

• Sample Program

Other topics about Analyzing Data

Overview

The Fixture Simulator provides the following functions:

• Matching Circuit Embedding

• Port Impedance Conversion

• Network De-embedding

Before you can use any of the features listed above, you must turn ON the desired feature individually and issue the following command to turn ON the Fixture Simulator:

Matching Circuit Embedding

The Matching Circuit feature simulates the characteristics that the DUT would exhibit when connected to a matching circuit.

ON/OFF

To turn ON or OFF the Matching Circuit, use the following command:

:CALC{1-160}:FSIM:SEND:PMC:STAT

You can only turn ON or OFF Matching Circuit for all the ports, not for each port individually. However, any port whose circuit type is set to "None" behaves as if this feature is permanently OFF.

Configuring the Matching Circuit Settings

To select a circuit type, use the following command:

:CALC{1-160}:FSIM:SEND:PMC:PORT{1-2}

To set the circuit constant, use the following commands:

When you want to use a user file to define the circuit type, specify the file by using the following command:

:CALC{1-160}:FSIM:SEND:PMC:PORT{1-2}:USER:FIL

Port Impedance Conversion

The Port Impedance Conversion feature converts the measurement results with a port impedance of 50 ohm to the characteristics of a different port impedance.

ON/OFF

To turn ON or OFF Port Impedance Conversion, use the following command:

:CALC{1-160}:FSIM:SEND:ZCON:STAT

You can only turn ON or OFF Port Impedance Conversion for all of the ports, not for each port individually. However, any port with ZO set to 50 ohm behaves as if this feature is permanently OFF.

Setting the Z0 Value

To set the target port impedance, use the following command:

:CALC{1-160}:FSIM:SEND:ZCON:PORT{1-2}:Z0

:CALC{1-160}:FSIM:SEND:ZCON:PORT{1-2}:REAL

:CALC{1-160}:FSIM:SEND:ZCON:PORT{1-2}:IMAG

Network De-embedding

The Network De-embedding feature eliminates any network that can cause error between the calibration level and the DUT.

ON/OFF

To turn ON or OFF Network De-embedding, use the following command:

:CALC{1-160}:FSIM:SEND:DEEM:STAT

You can only turn ON or OFF Network De-embedding for all of the ports, not for each port individually. However, any port whose Network De-embedding type is set to "None" behaves as if this feature is permanently OFF.

Selecting a Type

To select a Network De-embedding type, use the following command:

:CALC{1-160}:FSIM:SEND:DEEM:PORT{1-2}

Specifying the File

To specify the file that defines the criteria for Network De-embedding, use the following command:

:CALC{1-160}:FSIM:SEND:DEEM:PORT{1-2}:USER:FIL

Sample Program

See Fixture Simulator.