Setfreq - Keithley 4200A-SCS Reference Manual

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Model 4200A-SCS Parameter Analyzer Reference Manual

This command sets the 4210-CVU for auto range measurements. When setauto is called, the CVU

goes to the most sensitive range to make the measurement. Calling devint also selects autorange.

You can also use the rangei command to enable autorange, or select a fixed measurement range.

Autorange remains enabled until a fixed range is selected.

Programming examples

(on page 13-13)

(on page 13-179)

setfreq

This command sets the frequency for the AC drive.

int setfreq(int instr_id, double frequency);

This command sets the frequency of the AC drive. The 4210-CVU provides test frequencies from

1 kHz to 10 MHz in the following steps:

1 kHz through 10 kHz in 1 kHz steps

10 kHz to 100 kHz in 10 kHz steps

100 kHz to 1 MHz in 100 kHz steps

1 MHz to 10 MHz in 1 MHz steps

If an entered value is not a supported frequency, the closest supported frequency is selected (for

example, 15 kHz input selects 20 kHz). You can use the getstatus command to retrieve the

selected frequency value.

AC drive (AC voltage level and frequency) does not turn on until a measurement is made. AC drive

turns off after the measurement is completed. The DC voltage source stays on for the whole test.

Programming examples

drive frequency.

(on page 13-182)

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

(on page 13-194) 2 through 5 use auto range for impedance measurements.

The instrument identification code of the 4210-CVU: CVU1

Frequency of the AC drive

(on page 13-194) 1, 2, 4 and 5 use the setfreq command to set the AC

(on page 13-176)

Section 13: LPT library function reference