Interactive SourceMeter® Instrument Reference Manual Section 8:
2461-901-01 A/November 2015 8-185
Details
When the instrument is measuring low current and is driving a capacitive load, you may see
overshoot, ringing, and instability. You can enable the high capacitance mode to minimize these
problems.
The settings for high-capacitance mode apply when you operate the instrument using the 1 µA and
above current ranges. When operating using the 1 A range, the high-capacitance setting will not
affect the instrument rise time or current measure settling time.
Use this command with limited autorange (low) with the low range set to 1 µA.
Example
smu.source.highc = smu.ON
Turn the high capacitance mode on.
Also see
High-capacitance operation (on page 4-22)
smu.source.level
This attribute immediately selects a fixed amplitude for the selected source function.
Type TSP-Link accessible Affected by Where saved Default value
Instrument reset
Power cycle
Source configuration list
Source configuration list
Usage
sourceLevel = smu.source.level
smu.source.level = sourceLevel
Current: –7.35 A to 7.35 A
Voltage: –105 V to 105 V
Details
This command sets the output level of the voltage or current source. If the output is on, the new level
is sourced immediately.
The sign of the source level dictates the polarity of the source. Positive values generate positive
voltage or current from the high terminal of the source relative to the low terminal. Negative values
generate negative voltage or current from the high terminal of the source relative to the low terminal.
If a manual source range is selected, the level cannot exceed the specified range. For example, if the
voltage source is on the 2 V range, you cannot set the voltage source amplitude to 3 V. When auto
range is selected, the amplitude can be set to any level supported by the instrument because it will
select the correct range automatically when pulsing.
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