Keithley 4200A-SCS Reference Manual page 911

Section 13: LPT library function reference
Defining new test sequences using the smeasX, sintgX, or savgX command adds the command to
the active measure list. The previous measures are still defined and used; however, previous
measures for the second sweep can be eliminated by calling the clrscn command. New measures
are defined and used by calling the smeasX, sintgX, or savgX command after a clrscn command.
Note that changing the source mode of the SMU can modify the measure range. If the sourcing mode
is changed from voltage to current sourcing (or from current to voltage sourcing), the measure range
may be changed to minimize variations in the SMU output level. See
recommended command order.
It is recommended that you do not use GPIB instruments when doing sweeps with the bsweepX
command. Refer to
Example
double bvdss;
.
.
conpin(SMU1, 1, 0);
conpin(GND, 2, 3, 0);
limiti(SMU1, 100e-6); /* Define the I limit for the device. */
rangei(SMU1, 100e-6); /* Select a fixed range */
/* measurement. */
trigil(SMU1, -10e-6); /* Set the trigger point to -10 uA. */
bsweepv(SMU1, 10.0, 50.0, 40, 10.0e-3, &bvdss); /* Sweep */
/* from 10 V to 50 V in 40 */
/* steps with 10 ms settling */
/* time per step. */
This example measures the drain to source breakdown voltage of a field-effect transistor (FET). A linear
voltage sweep is generated from 10.0 V to 50.0 V by SMU1 using the bsweepv command. The breakdown
current is set to 10 mA by using the trigil command. The voltage at which this current is exceeded is
stored in the variable bvdss and is returned to the application processor by the execut command.
Also see
clrscn (on page 13-9)
devclr (on page 13-67)
execut (on page 13-16)
rtfary (on page 13-36)
savgX (on page 13-36)
sintgX (on page 13-44)
smeasX (on page 13-45)
sweepX (on page 13-88)
trigXg, trigXl (on page 13-47)
trigcomp (on page 13-47)
13-66
kibdefint (on page 13-24) for additional information.
Model 4200A-SCS Parameter Analyzer Reference Manual
rangeX
4200A-901-01 Rev. C / February 2017
(on page 13-83) for