![background image](http://html2.mh-extra.com/html/keithley/2657a/2657a_reference-manual_4007750535.webp)
Section 7: TSP command reference
Model 2657A High Power System SourceMeter® Instrument Reference Manual
7-222
2657A-901-01 Rev. B/December 2012
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
(on page 7-220)
smuX.source.output
This attribute sets the source output state (on or off).
Type
TSP-Link accessible
Affected by
Where saved
Default value
Attribute (RW)
Yes
SMU reset
Instrument reset
Recall setup
Not saved
(0 smuX.OUTPUT_OFF)
Usage
sourceOutput
= smu
X
.source.output
smu
X
.source.output =
sourceOutput
sourceOutput
The source's output state setting; set to one of the following values:
0
or
smu
X
.OUTPUT_OFF
: Turns off the source output
1
or
smu
X
.OUTPUT_ON
: Turns on the source output
2
or
smu
X
.OUTPUT_HIGH_Z
: Turns off the output in high Z mode (allows you to go
to high Z mode without first setting the
smu
X
.source.offmode
attribute to
smu
X
.OUTPUT_HIGH_Z
)
X
Source-measure unit (SMU) channel (for example,
smua.source.output
applies
to SMU channel A)
Details
Reading this attribute returns the output state of the source. Setting this attribute switches the output of the
source on or off.
When the output is switched on, the SMU sources either voltage or current, as set by
smu
X
.
source.func
.
Setting this attribute to
smu
X
.OUTPUT_HIGH_Z
causes the output to turn off and go to the High Z mode. If the
smu
X
.source.output
is read after setting this attribute to
smu
X
.OUTPUT_HIGH_Z
, it returns
0
.
Содержание 2657A
Страница 3: ......