Model 4200A-SCS Source-Measure Unit (SMU) User's Manual
Section 3: Setting up SMUs in Clarius
4200A-SMU-900-01 Rev. A December 2020
3-19
Force Range (Source Range)
The SMU range that is used when forcing the voltage or current.
You can select:
•
Best Fixed
: The instrument selects a single fixed source range that accommodates all the source
levels in the test.
•
Auto:
The instrument selects the most sensitive source range for each source level in the test.
This option provides the best resolution and control when sweeping or stepping several decades.
However, the range changes can reduce speed.
•
Specific range
: Select a range. The source remains on the range that is set. If you are sweeping
and a sweep point exceeds the source range capability, the source outputs the maximum level for
that range. This range must be equal to or greater than the largest value in the sweep.
List Values
Select
Enter Values
to open a dialog box in which you can type the current or voltage level for each
step of the sweep in the rows. You can type any valid instrument current or voltage.
You can select a value or multiple values in the list and copy, cut, or delete them. Use Paste to add
values that you copied or cut to a new location in the list.
Note that you cannot have blank rows in between values.
You can use the Ctrl key plus mouse selections to pick selected rows, then use the buttons to copy,
cut, or delete those rows. Note that when you paste the rows, any skipped rows are ignored (there will
be no blank rows).
You can use the Shift key plus mouse selections to pick a range of rows. When you paste the rows,
any blank rows are ignored.
Low Range
Available when the Measure Range is set to Limited Auto. This sets the minimum range that the
instrument uses.
Measure Current
When Measure Current is selected, the instrument measures current. Current values are recorded in
the Analyze sheet and shown in the graph.
Off Time
Available when Pulse Mode is selected. The amount of time that the pulse is off (5 ms to 20 s).
