Keithley 2600a series - Page 461

2600AS-901-01 Rev. B / September 2008 Return to Section Topics 19-139
Series 2600A System SourceMeter® Instruments Reference Manual Section 19: Remote Commands
smuX.source.rangeY
X = SMU channel (a or b)
Y = SMU measure function (v or i)
Where: v = voltage, i = current
Attribute Source range.
Default
rangei 100e-9 (2601A/2602A/2611A/2612A)
1e-9 (2635A/2636A)
rangev 100e-3 (2601A/2602A)
200e-3 (2611A/2612A/2635A/2636A)
TSP-Link
accessibility
This attribute can be accessed from a remote TSP-Link node.
Usage rangeval = smuX.source.rangev -- Reads voltage source range.
smuX.source.rangev = rangeval -- Writes voltage source range.
rangeval = smuX.source.rangei -- Reads current source range.
smuX.source.rangei = rangeval -- Writes current source range.
rangeval The expected voltage or current to be sourced.
Remarks • Reading this attribute returns the positive full-scale value of the source range the SMU is
currently using. Assigning to this attribute sets the SMU on a fixed range large enough to source
the given value. The instrument will select the best range for sourcing a value of rangeval.
• smuX.source.rangeX is primarily intended to eliminate the time required by the automatic
range selection performed by a sourcing instrument. Because selecting a fixed range will prevent
auto-ranging, an over-range condition can occur, for example, sourcing 10.0V on the Model
2601A/2602A 6.0V range, or sourcing 5.0V on the Model 2611A/2612A/2635A/2636A 2.0V
range.
Details See Range in Section 6.
Also see smuX.source.autorangeY
Example Selects 1V source range for Model 2601A/2602A SMU A:
smua.source.rangev = 1
smuX.source.settling
X = SMU channel (a or b)
Attribute The source settling mode.
Default smuX.SETTLE_SMOOTH
TSP-Link
accessibility
This attribute can be accessed from a remote TSP-Link node.
Usage settle_option = smuX.source.settling -- Reads source settling option.
smuX.source.settling = settle_option -- Writes source settling option.
settle_option The source settling mode.
Set settle_option to one of the following values:
0 or smuX.SETTLE_SMOOTH Turns off all settling operations (default).
1 or smuX.SETTLE_FAST_RANGE Instructs the SMU to use a faster procedure
when changing ranges.
2 or smuX.SETTLE_FAST_POLARITY Instructs the SMU to change polarity without going to
zero.
3 or smuX.SETTLE_DIRECT_IRANGE Instructs the SMU to change the amps range directly.
4 or smuX.SETTLE_SMOOTH_100NA Enables the use of range rampers for the 100 nA
range.
128 or smuX.SETTLE_FAST_ALL Enables all smuX.SETTLE_FAST_* operations.