Keithley 2657A User Manual

Section 7: TSP command reference Model 2657A High Power System SourceMeter® Instrument Reference Manual
7-224 2657A-901-01 Rev. B/December 2012
smuX.source.rangeY
This attribute contains the source range.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes SMU reset
Instrument reset
Recall setup
Saved setup Current: 1e-9 (1 nA)
Voltage: 200 (200 V)
Usage
rangeValue = smuX.source.rangeY
smuX.source.rangeY = rangeValue
rangeValue
Set to the maximum expected voltage or current to be sourced
X
Source-measure unit (SMU) channel (for example, smua.measure.rangev
applies to SMU channel A)
Y
SMU source function (v = voltage, i = current)
Details
This attribute contains a value that sets the source-measure unit (SMU) to a fixed range large enough to source
the value. When read, the attribute contains the range the instrument is presently on when in autorange.
Assigning a value to this attribute sets the SMU to a fixed range large enough to source the assigned value. The
instrument selects the best range for sourcing a value of rangeValue.
Reading this attribute returns the positive full-scale value of the source range the SMU is currently using. With
source autoranging enabled, the output level controls the range. Querying the range after the level is set returns
the range the instrument chose as appropriate for that source level.
This attribute is primarily intended to eliminate the time required by the automatic range selection performed by a
sourcing instrument. Because selecting a fixed range prevents autoranging, an overrange condition can occur.
Example
smua.source.rangev = 200
Selects the 200 V source range for SMU channel A.
Also see
Range (on page 2-72)
reset()
(on page 7-155)
setup.recall()
(on page 7-175)
smuX.measure.rangeY
(on page 7-204)
smuX.reset()
(on page 7-211)
smuX.source.autorangeY
(on page 7-212)
smuX.source.settling
This attribute contains the source settling mode.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes SMU reset
Instrument reset
Recall setup
Not saved 0 (smuX.SETTLE_SMOOTH)

Keithley 2657A Specifications

General

Brand	Keithley
Model	2657A
Category	Measuring Instruments
Language	English