Keithley 4200A-SCS, Reference Manual

Page: 298 / 1381

Model 4200A-SCS Parameter Analyzer Reference Manual Section 6: Clarius
4200A-901-01 Rev. C / February 2017 6-29
Voltage Step operation mode - SMU
The Voltage Step operation mode increments through evenly-spaced, constant voltage steps over a
range that you specify. The time interval for each step is determined automatically by the time
required to complete a sweep.
For each step, parametric curve data is generated. The data is recorded in the Analyze pane.
Figure 228: Stepping the gate voltage of a FET
The parameters that are available for this mode are briefly described in the following table. Select the
links to access additional information. The parameters are listed in the order in which they appear in
the All Parameters pane.
Parameter Description
Start (on page 6-37) The Start parameter is the voltage that is forced for the first step value.
Stop (on page 6-37) The voltage that is forced for the last step value.
Step (on page 6-37) The voltage size of each step of the sweep. The source level changes in
equal steps of this size from the start level to the stop level. A measurement
is made at each source step (including the start and stop levels).
Points (on page 6-38) The number of data points that will be measured. This value is calculated by
Clarius using the information entered for the Start, Stop, and Step
parameters.
Force Range (Source Range) (on
page 6-39)
The SMU range that is used when forcing the voltage.
Compliance (on page 3-3) A limit that stops the 4200A-SCS from sourcing a current that is more than
that limit.
Power On Delay (on page 6-41) The delay between when SMUs are powered on in a test sequence.
Overvoltage Protection (on page 6-
44)
A limit that restricts the maximum voltage level that the instrument can
source. It is in effect when either current or voltage is sourced.
Measure Current (on page 6-44) When this box is selected, the instrument measures current. Current is
recorded in the Analyze sheet and shown in the graph.
Current Column Name (on page 6-
44)
The name of the current measurement. This is the name that Clarius
displays in the Analyze spreadsheet column for that measurement.
Current Range (on page 6-45)
The measure range determines the full-scale measurement span that is
applied to the signal.
Low Range (on page 6-44) Available when the Measure Range is set to Limited Auto. This sets the
minimum range that the instrument uses.
Measure or Report Voltage (on page
6-45)
Determines if voltage values are recorded in the Analyze spreadsheet.
Report Value (Report Voltage or
Measure Voltage)
(on page 6-46)
Determines if programmed voltage values or actual measured voltage
values are recorded in the Analyze spreadsheet.