Model 2651A High Power System SourceMeter® Instrument Reference Manual Section 2: General operation
2651A-901-01 Rev. A / March 2011 2-61
Output-off function
This setting is used only when the when output is turned off and the Model 2651A is in NORMAL
output-off mode (smuX.source.offmode = smuX.OUTPUT_NORMAL).
When the Model 2651A is in NORMAL output-off mode, you can set the output-off function to
CURRENT or VOLTAGE through the CONFIG menu on the front panel, or by using the
smuX.source.offfunc attribute from a remote interface. VOLTAGE is the default output-off
function.
When the output is turned off and the selected output-off function is VOLTAGE
(smua.source.offfunc = smua.OUTPUT_DCVOLTS):
• The source-measure unit (SMU) sources 0 V.
• The current limit is set by the smua.source.offlimiti attribute (default 1 mA).
When the output is turned off and the selected output-off function is CURRENT
(smua.source.offfunc = smua.OUTPUT_DCAMPS):
• The SMU sources 0 A.
• The voltage limit is set by the smua.source.offlimitv attribute (default 40 V).
When the output-off function is set to either voltage or current, the SMU may source or sink a very
small amount of power. In most cases, this source or sink power level is not significant.
Selecting the output-off function
NOTE
This setting is used only when the when output is turned off and the source-measure unit (SMU) is in
NORMAL output-off mode.
Setting the output-off function from the front panel
To configure the output-off function from the front panel:
1. Press the CONFIG key.
2. Press the OUTPUT ON/OFF control. The CONFIGURE OUTPUT A menu displays.
3. In the CONFIGURE OUTPUT A menu, select OFF-STATE to display the OUTPUT OFF STATE
A menu.
4. With the OUTPUT OFF STATE A menu displayed, select FUNCTION to display the OFF
FUNCTION A menu.
5. In the OFF FUNCTION A menu, select CURRENT or VOLTAGE.
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