Model 2601B-PULSE System SourceMeter Instrument Reference Manual Section 11: TSP command reference
2601B-PULSE-901-01A April 2020 11-233
Also see
smua.contact.check() (on page 11-188)
smua.contact.r() (on page 11-190)
smua.source.offfunc (on page 11-231)
smua.source.offmode (on page 11-233)
smua.source.offmode
This attribute sets the source output-off mode.
SMU reset
Instrument reset
Recall setup
Usage
sourceOffMode = smua.source.offmode
smua.source.offmode = sourceOffMode
The output-off setting; set to one of the following values:
â–ª 0 or smua.OUTPUT_NORMAL: See Details
â–ª 1 or smua.OUTPUT_ZERO: See Details
â–ª 2 or smua.OUTPUT_HIGH_Z: Opens the output relay when the output is
turned off
Details
Reading this attribute returns the output-off mode of the source. Setting this attribute configures the
SMU output-off mode.
When smua.OUTPUT_NORMAL is selected and the pulser is disabled, the source function is
configured according to the smua.source.offfunc attribute. The smua.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 smua.source.offlimitv attribute sets
the voltage limit (similar to how the smua.source.offlimiti attribute sets the current limit when
the SMU is operating as a 0 V voltage source).
When the output-off mode is set to smua.OUTPUT_ZERO and the pulser is disabled, the source is
configured to output 0 V. This is equivalent to smua.OUTPUT_NORMAL mode with
smua.source.offfunc = smua.OUTPUT_DCVOLTS. If the source function is voltage, the current
limit is not changed. If the source function is current, the current limit is set to the current source level
or 10% of the current source range, whichever is greater.
When smua.OUTPUT_NORMAL or smua.OUTPUT_ZERO is selected and the pulser is enabled, the
output circuit is shorted.
When sourceOffMode is set to smua.OUTPUT_HIGH_Z, the SMU opens the output relay when the
output is turned off. To prevent excessive wear on the output relay, do not use this output-off mode
for tests that turn the output off and on frequently.