Kxci Cvu Commands; User Mode; System Mode - Keithley 4200A-SCS Reference Manual

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Section 9: Keithley External Control Interface (KXCI)

KXCI CVU commands

The user and system command modes are used to control the CVU using KXCI. This mimics the

paradigm used to control the SMUs in I/V tests.

User mode is similar to LPT library (when running locally). All the commands are processed

sequentially, and you have full control over the execution sequence and flow control. In this mode,

when a measurement is complete, only one point is generated (R + Jx, Cp, Gp, Cs, Rs, and so on).

System mode is similar to Clarius tests. When you send the run command, the system buffers and

executes all CVU test parameters automatically. The CVU card executes full sweeps. The output

sequencing, settling, and sweeping are all handled internally. You return the entire buffer of test data.

Many of the CVU commands are valid in both user and system mode. In user mode, the command is

processed immediately and sent directly to the card. In system mode, the parameter is buffered in a

test object, and does not take effect until the execute command is sent. At that time, the CVU

firmware acts on the settings and executes the test sequence.

All the commands act on the selected card, which is set with the :CVU:CHANNEL command.

This command triggers and returns single Z-measurement using current CVU settings.

When the command is complete, the single reading is available over GPIB or ethernet.

:CVU:SOAK:DCV

This command sets the presoak DC voltage for CVU card for all sweeps for the selected CVU card.

:CVU:SOAK:DCV voltage

All sweeps include frequency sweep, DC voltage sweep, AC voltage sweep, and so on.

Voltage to bias before test sequence begins; voltages range from -30 V to +30 V

Model 4200A-SCS Parameter Analyzer Reference Manual

4200A-901-01 Rev. C / February 2017