Keithley System SourceMeter 2601B, Reference Manual

Page: 567 / 864

Series 2600B System SourceMeter® Instrument Reference Manual Section 7: TSP command reference
2600BS-901-01 Rev. B / May 2013 7-227
Usage
sourceOffMode = smu X .source.offmode
smu X .source.offmode = sourceOffMode
sourceOffMode The output-off setting; set to one of the following values:
0
or
smu X .OUTPUT_NORMAL
: Configures the source function according to
smu X .source.offfunc
attribute
1
or
smu X .OUTPUT_ZERO
: Configures source to output 0 V as
smu X .OUTPUT_NORMAL
with different compliance handling (see the
Details
below)
2
or
smu X .OUTPUT_HIGH_Z
: Opens the output relay when the output is turned off
X Source-measure unit (SMU) channel (for example,
smua.source.offmode
applies to SMU channel A)
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
smu X .OUTPUT_NORMAL
. In this mode, the source function is configured
according to the
smu X .source.offfunc
attribute. The
smu X .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
smu X .source.offlimitv
attribute sets the voltage limit (similar to how the
smu X .source.offlimiti
attribute sets the current limit when the SMU is operating as a 0 V voltage source).
When the
sourceOffMode
is set to
smu X .OUTPUT_ZERO
, the source is configured to output 0 V just as
smu X .OUTPUT_NORMAL
mode with
smu X .source.offfunc = smu X .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 percent of the current source range, whichever is greater.
When offmode is set to
smu X .OUTPUT_HIGH_Z
, the SMU opens the output relay when the output is turned off.
Example
smua.source.offmode = smua.OUTPUT_HIGH_Z Sets the output-off mode for SMU
channel A to open the output relay
when the output is turned off.
Also see
Output-off states (on page 2-77)
smuX.source.offfunc (on page 7-225)
smuX.source.offlimitY (on page 7-226)
smuX.source.output (on page 7-228)