Keithley 2601 Reference Manual page 316

Section 12: Instrument Control Library
Also see smuX.nvbufferY
Example Creates a 200 reading RAM buffer named "mybuffer2" for SMUA:
mybuffer2 = smua.makebuffer(200)
smuX.measure.analogfilter
Attribute Controls the use of an analog filter when measuring on the lowest current ranges.
Usage
option = smuX.measure.analogfilter -- Reads the filter setting.
smuX.measure.analogfilter = option -- Writes the filter setting.
where option is:
0 filter off
1 filter on
Remarks • This attribute engages an approximately 1hz analog filter across the current range
elements.
• The analog filter is only active when using the 1nA and 100pA measurement ranges.
Example
smua.measure.analogfilter = 0
smuX.measure.autorangeY
Attribute Measure auto range setting.
Usage autorange = smuX.measure.autorangeY -- Reads measure auto range.
smuX.measure.autorangeY = autorange -- Writes measure auto range.
Set autorange to one of the following values:
or
0 smuX.AUTORANGE_OFF
or
1 smuX.AUTORANGE_ON
Remarks • This attribute indicates the measurement auto range state. Its value will be
smuX.AUTORANGE_OFF when the SMU measure circuit is on a fixed range and
smuX.AUTORANGE_ON when it is in auto range mode.
• Setting this attribute to smuX.AUTORANGE_OFF puts the SMU on a fixed range. The fixed
range used will be the range the SMU measure circuit was currently using.
• Setting this attribute to smuX.AUTORANGE_ON puts the SMU measure circuit into auto
range mode. It will remain on its present measure range until the next measurement is
requested.
Details See "Range" in
Also see smuX.measure.rangeY
Example Enables voltage measure autoranging for SMU A:
smua.measure.autorangev = smua.AUTORANGE_ON
smuX.measure.autozero
Attribute Behavior of the SMU's A/D internal reference measurements (autozero).
Usage azmode = smuX.measure.autozero
smuX.measure.autozero = azmode
Set azmode to be one of the following values:
or
0 smuX.AUTOZERO_OFF
or
1 smuX.AUTOZERO_ONCE
or
2 smuX.AUTOZERO_AUTO
12-56
X = SMU channel (a or b)
(Models 2635 and 2636 only)
X = SMU channel (a or b)
Y = SMU measure function (v or i) where v = voltage, i =
current
Disables measure auto range.
Enables measure auto range.
Section 6.
X = SMU channel (a or b)
-- Reads autozero.
-- Writes autozero.
Autozero disabled.
Performs autozero once, then
Automatic checking of reference and zero
measurements. An autozero is performed
when needed.
Return to Section Topics
Series 2600 System SourceMeter® Instruments Reference Manual
- -T .
urn off analog filter
disables autozero.
2600S-901-01 Rev. C / January 2008