Cvu_Custom_Cable_Comp; Devclr - Keithley 4200A-SCS Reference Manual

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Section 13: LPT library function reference

cvu_custom_cable_comp

This command determines the delays needed to accommodate custom cable lengths.

cvu_custom_cable_comp(int instr_id);

The custom cable length measure gathers a specific set of timing coefficients to be applied during the

C-V testing for a custom length cable. They are used to compensate the calibrated measurements

made from the CVU.

Custom cable lengths are any lengths that are not 0 m, 1.5 m, or 3 m.

Once this command is run, these values are applied if you select a cable length of Custom in Clarius

Tools > CVU Connection Compensation.

Possible return values are:

-907: LPOT/LCUR fail

-908: HPOT/HCUR fail

Connection compensation

This command sets all sources to a zero state.

int devclr(void);

This command clears all sources sequentially in the reverse order from which they were originally

forced. Before clearing all Keithley supported instruments, GPIB-based instruments are cleared by

sending all strings defined with the kibdefclr command.

devclr is implicitly called by clrcon, devint, execut, and tstdsl.

For C-V testing, this command turns off the DC bias voltage.

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The instrument identification code of the CVU (CVU1)

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Model 4200A-SCS Parameter Analyzer Reference Manual

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