-SCS Parameter Analyzer Reference Manual Section 9: Keithley External Control Interface (KXCI)
4200A-901-01 Rev. C / February 2017 9-17
VR and IR
This command sets up the VAR1 source function.
Usage
AAB, ±CCC.CCCC, ±DDD.DDDD, ±EEE.EEEE, ±FFF.FFFF
• VR: Voltage source (SMU or VS1...VS9)
•
IR: Current source (SMU only)
• 1: Linear sweep
• 2: Log10 sweep
• 3: Log25 sweep
•
: Log50 sweep
• Voltage source: −210.00 V to +210.00 V
• Current source, 4200-SMU: −0.1050 A to +0.1050 A
•
Current source, 4210-SMU:
−
• Voltage source: −210.00 V to +210.00 V
• Current source, 4200-SMU: −0.1050 A to +0.1050 A
• Current source, 4210-SMU: −1.0500 A to +1.0500 A
Step value (linear sweep only):
• Voltage source: −210.00 V to +210.00 V
• Current source, 4200-SMU: −0.1050 A to +0.1050 A
• Current source, 4210-SMU: −1.0500 A to +1.0500 A
For a log sweep, do not set a step value (steps are determined by the setting for B)
Compliance value (also see Details):
• Voltage source: −210.00 V to +210.00 V
• Current source, 4200-SMU: −0.1050 A to +0.1050 A
• Current source, 4210-SMU: −1.0500 A to +1.0500 A
For a log sweep, do not set a compliance value
Details
If you specify a voltage start or step value below 0.001 V, KXCI automatically sets the value to zero.
When setting the step value, be aware that the maximum number of points for VAR1 is 1024:
Number of points = (int)(Abs((Stop Value - Start Value) / Step Value) + 1.5)
When you are setting a voltage source mode (VR), you are setting a current compliance value. If you
are setting a current source mode (IR), you are setting voltage compliance. When sourcing voltage,
note that if you specify a compliance current that is below the minimum allowable value (100 pA with
a preamplifier installed and 100 nA without a preamplifier), KXCI sets it to the minimum allowable
value.
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