Keithley 2657A User Manual

Section 7: TSP command reference Model 2657A High Power System SourceMeter® Instrument Reference Manual
7-194 2657A-901-01 Rev. B/December 2012
Details
When making measurements, the SMU uses one of two types of analog-to-digital converters. This attribute
controls which analog to converter is used.
Example
smua.measure.adc = smua.ADC_FAST
Selects the fast A/D converter for SMU
channel A.
Also see
Analog-to-digital converter (on page 4-1)
smuX.measure.nplc
(on page 7-203)
smuX.measure.autorangeY
This attribute stores the measurement autorange setting.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes Instrument reset
SMU reset
Recall setup
Saved setup 1 (smuX.AUTORANGE_ON)
Usage
autoRange = smuX.measure.autorangeY
smuX.measure.autorangeY = autoRange
autoRange
The state of the measurement autorange setting; set to one of the following values:
0 or smuX.AUTORANGE_OFF: Disabled
1 or smuX.AUTORANGE_ON: Enabled
2 or smuX.AUTORANGE_FOLLOW_LIMIT: Measure range automatically set to the limit
range
X
Source-measure unit (SMU) channel (for example, smua.measure.autorangev
applies to SMU channel A)
Y
SMU measure function (v = voltage, i = current)
Details
This attribute indicates the measurement autorange state. Its value is smuX.AUTORANGE_OFF when the SMU
measure circuit is on a fixed range and smuX.AUTORANGE_ON when it is in autorange mode.
Setting this attribute to smuX.AUTORANGE_OFF puts the SMU on a fixed range. The fixed range is the present
SMU measure range.
Setting this attribute to smuX.AUTORANGE_ON puts the SMU measure circuit in autorange mode. It remains on
its present measure range until the next measurement is requested.
Example
smua.measure.autorangev = 1
Enables voltage measurement autoranging for SMU
channel A. Alternatively, the value 1 may be replaced with
smua.AUTORANGE_ON.

Keithley 2657A Specifications

General

Brand	Keithley
Model	2657A
Category	Measuring Instruments
Language	English