Keithley 2651A Reference Manual page 529

Model 2651A High Power System SourceMeter® Instrument Reference Manual
Details
Reading this attribute gives the output-off mode of the source. Setting this attribute configures the SMU output-off
mode.
The default sourceOffMode is smuX.OUTPUT_NORMAL. In this mode, the source function will be configured
according to the smuX.source.offfunc attribute. The smuX.source.offfunc attribute controls whether the
SMU is configured as a 0 V voltage source or a 0 A current source. When the SMU is operating as a 0 A current
source, the smuX.source.offlimitv attribute sets the voltage limit, just as the smuX.source.offlimiti
attribute sets the current limit when the SMU is operating as a 0 V voltage source.
When the offmode is set to smuX.OUTPUT_ZERO, the source will be configured to output 0 V just as
smuX.OUTPUT_NORMAL mode with smuX.source.offfunc = smuX.OUTPUT_DCVOLTS. If the source
function is voltage, the current limit will not be changed. If the source function is current, the current limit will be
set to the current source level or 10 percent of the current source range, whichever is greater.
When offmode is set to smuX.OUTPUT_HIGH_Z, the SMU will open the output relay when the output is turned
off.
Example
smua.source.offmode = smua.OUTPUT_HIGH_Z
Also see
Output-off modes
smuX.source.offfunc
smuX.source.offlimitY
smuX.source.output
smuX.source.output
This attribute sets source output state (on or off).
Type TSP-Link accessible
Attribute (RW) Yes
Usage
sourceOutput = smuX.source.output
smuX.source.output = sourceOutput
sourceOutput
X
2651A-901-01 Rev. A / March 2011
(see "Output-off states" on page 2-59)
(on page 7-218)
(on page 7-219)
(on page 7-221)
Affected by
SMU reset
Instrument reset
Recall
The source's output state setting; set to one of the following values:
0 or smuX.OUTPUT_OFF: Turns off the source output
1 or smuX.OUTPUT_ON: Turns on the source output
2 or smuX.OUTPUT_HIGH_Z: Turns off the output in high Z mode (allows you to go
to high Z mode without first setting the smuX.source.offmode attribute to
smuX.OUTPUT_HIGH_Z).
Source-measure unit (SMU) channel (for example, smua.source.output applies
to SMU channel A)
Sets the output-off operation for
SMU channel A to open the output
relay when the output is turned off.
Where saved Default value
Not saved smuX.OUTPUT_OFF
Section 7: Command reference
7-221