Gm_Vsweep() - Keithley 2651A Reference Manual

Model 2651A High Power System SourceMeter® Instrument Reference Manual
Details
Output data includes transconductance values, reading buffer with measured voltages, reading buffer with
measured voltages and currents.
If all parameters are omitted when this function is called, this function is executed with the parameters set to the
default values.
The gm_isweep() function performs a linear current sweep, measuring voltage and current, and then
calculating the transconductance (Gm) at each point using the central difference method. It can return an array of
Gm values, a reading buffer with the measured voltages, and a reading buffer with the measured currents.
Example
gm_array = gm_isweep(smua, 0, 0.01, 20)
gm_array, vbuf = gm_isweep(smua, 0, 0.01, 20)
gm_array, vbuf, ibuf = gm_isweep(smua, 0,
0.01, 20)
Also see

gm_vsweep()

gm_vsweep()
This KIParlib factory script
transconductance (Gm) at each point.
Type TSP-Link accessible
Function No
Usage
gm_array, ibuf, vbuf = gm_vsweep(smu, start_v, stop_v, points)
gm_array
ibuf
vbuf
smu
start_v
stop_v
points
Details
Output data includes transconductance values, reading buffer with measured currents, reading buffer with
measured currents and voltages.
The gm_vsweep() function performs a linear voltage sweep, measuring voltage and current, and then
calculating the transconductance (Gm) at each point using the central difference method. It can return an array of
Gm values, a reading buffer with the measured currents, and a reading buffer with the measured voltages.
2651A-901-01 Rev. A / March 2011
(on page 7-93)
(on page 5-24) function performs a linear voltage sweep and calculates the
Affected by
A Lua table containing the calculated Gm values at each point
A reading buffer containing the measured current at each point
A reading buffer containing the measured voltage at each point
System SourceMeter
Starting voltage level of the sweep
Ending voltage level of the sweep
Number of measurements between start_v and stop_v (must be ≥ 2)
Source-measure unit (SMU) A returns Gm
values only.
SMU A returns Gm and reading buffer with
measured voltages.
SMU A returns Gm and reading buffers with
measured voltages and currents.
Where saved
®
instrument channel (set to smua)
Section 7: Command reference
Default value
7-93