Output-off function
This setting is used only when the output is turned off and the 2600B is set to the normal output-off
mode (smuX.source.offmode = smuX.OUTPUT_NORMAL).
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
(smuX.source.offfunc = smuX.OUTPUT_DCVOLTS):
• The source-measure unit (SMU) sources 0 V.
• The current limit is set by the smuX.source.offlimiti attribute (default 1 mA).
When the output is turned off and the selected output-off function is CURRENT
(smuX.source.offfunc = smuX.OUTPUT_DCAMPS):
• The SMU sources 0 A.
• The voltage limit is set by the smuX.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 insignificant.
Selecting the output-off function
This setting is used only when the output is turned off and the source-measure unit (SMU) is in
NORMAL output-off mode.
To configure the output-off function from the front panel:
1. Press the CONFIG key.
2. Press the OUTPUT ON/OFF control.
3. Select OFF-STATE and then select FUNCTION.
4. Select CURRENT or VOLTAGE.
5. Press the EXIT key to return to the normal display.
To configure the output-off function remotely:
To set 0 V output with current limit set by the smuX.source.offlimiti attribute:*
smuX.source.offfunc = smuX.OUTPUT_DCVOLTS
To set 0 A output with voltage limit set by the smuX.source.offlimitv attribute:*
smuX.source.offfunc = smuX.OUTPUT_DCAMPS
* smuX can be smua for channel A or smub for channel B
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