Keithley 2601 Reference Manual page 332

Section 12: Instrument Control Library
smuX.source.levelY
Attribute Source levels.
Usage sourceval = smuX.source.levelY-- Reads source value.
smuX.source.levelY = sourceval-- Writes source value.
sourceval
Remarks • This attribute configures the source level of the voltage or current source.
• If the source is configured as a voltage source and the output is on, the new
smuX.source.levelv setting will be sourced immediately. If the output is off or if the
source is configured as a current source, the voltage level will be sourced when the
source is configured as a voltage source and the output is turned on.
• If the source is configured as a current source and the output is on, the new
smuX.source.leveli setting will be sourced immediately. If the output is off or if the
source is configured as a voltage source, the current level will be sourced when the
source is configured as a current source and the output is turned on.
• The sign of sourceval dictates the polarity of the source.
positive voltage or current from the high terminal of the source relative to the low
terminal. Negative values generate negative voltage or current from the high
terminal of the source relative to the low terminal.
• The reset function sets the source levels to 0V and 0A.
Details See Section 4
Also see smuX.source.func,
Example Sets V-source to 1V for SMU A:
smua.source.levelv = 1
smuX.source.limitY
Attribute Compliance limits.
Usage
limit = smuX.source.limitY
smuX.source.limitY = limit
limit
Remarks • Use the smuX.source.limiti attribute to limit the current output of the voltage
source. Use smuX.source.limitv to limit the voltage output of the current source.
The SMU will always choose (auto range) the source range for the limit setting.
• This attribute should be set in the test sequence before the turning the source on.
• Reading this attribute indicates the presently set compliance value. Use
smuX.source.compliance to read the state of source compliance.
Details See Section 4
Also see smuX.source.compliance, smuX.source.func,
Example Sets V-compliance to 30V for SMU A:
smua.source.limitv = 30
12-72
X = SMU channel (a or b)
Y = SMU measure function (v or i)
where v = voltage, i = current
Set 2601/2602 voltage from 0 to ±40 (volts).
Set 2601/2602 current from 0 to ±3 (amps).
Set 2611/2612/2635/2636 voltage from 0 to
±200 (volts).
Set 2611/2612/2635/2636 current from 0 to
±1.5 (amps).
"basic operation"
smuX.source.output
X = SMU channel (a or b)
Y = SMU measure function (v or i)
where v = voltage, i = current
-- Reads compliance limit.
-- Writes compliance limit.
2601/2602 voltage compliance from 0 to ±40 (volts).
2601/2602 current compliance from 0 to ±3 (amps).
2611/2612/2635/2636 voltage compliance from 0 to
±200 (volts).
2611/2612/2635/2636 current compliance from 0 to
±1.5 (amps).
"basic operation".
Return to Section Topics
Series 2600 System SourceMeter® Instruments Reference Manual
Positive values generate
smuX.source.output
2600S-901-01 Rev. C / January 2008