Keithley 2651A Reference Manual

Model 2651A High Power System SourceMeter® Instrument Reference Manual Section 7: Command reference
2651A-901-01 Rev. A / March 2011 7-215
Details
Reading this attribute gives the output function of the source for the specified SMU Channel. Setting this attribute
configures the specified SMU Channel as either a voltage source or a current source.
Example
smua.source.func = smua.OUTPUT_DCAMPS
Selects the source current function
for SMU Channel A.
Also see
smuX.source.levelY (on page 7-216)
smuX.source.output
(on page 7-221)
smuX.source.highc
This attribute sets high capacitance mode.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes SMU reset
Instrument reset
Recall
Saved setups smuX.DISABLE
Usage
highC = smuX.source.highc
smuX.source.highc = highC
highC
The state of the high capacitance mode. Set to one of the following values:
0 or smuX.DISABLE: Disables high capacitance mode.
1 or smuX.ENABLE: Enables high capacitance mode.
X
SMU channel (for example, smua.source.highc applies to SMU Channel A).
Details
Turning on High-C mode has the following effects on the SMU settings:
smuX.measure.autorangei is set to smuX.AUTORANGE_FOLLOW_LIMIT and cannot be changed.
Current ranges below 1 μA are not accessible
If smuX.source.limiti is less than 1 μA, it is raised to 1 μA.
If smuX.source.rangei is less than 1 μA, it is raised to 1 μA.
If smuX.source.lowrangei is less than 1 μA, it is raised to 1 μA.
If smuX.measure.lowrangei is less than 1 μA, it is raised to 1 μA.
Example
smua.source.highc = smua.ENABLE
Activates high capacitance mode
for SMU Channel A.
Also see
High-capacitance mode (on page 3-65)

Keithley 2651A Specifications

General

Brand	Keithley
Model	2651A
Category	Measuring Instruments
Language	English