Keithley 2601 Reference Manual page 319

Series 2600 System SourceMeter® Instruments Reference Manual
smuX.measure.delayfactor
Attribute This attribute is a multiplier to smuX.DELAY_AUTO measurement delays.
Usage
delayfactor = smuX.measure.delayfactor
smuX.measure.delayfactor = delayfactor
Remarks • The delay factor is only applied when
smuX.measure.delay = smuX.DELAY_AUTO.
• The default value is 1.0.
• This attribute can be set to a value less than 1 (e.g. 0.5) to decrease the automatic delay.
• This attribute can be set to a value greater than 1 (e.g. 1.5 or 2.0) to increase the
automatic delay.
• Setting this attribute to zero disables delays, even when
smuX.measure.delay = smuX.DELAY_AUTO.
Also see smuX.measure.delay
Example
smuX.measure.delayfactor = 2.0
smuX.measure.filter.count
Attribute Number of measured readings to yield one filtered measurement.
Usage count = smuX.measure.filter.count
smuX.measure.filter.count = count
count
This attribute is the number of measurements that will be performed to yield one
Remarks •
filtered measurement.
The
•
reset
Details See "Filters" in
Also see smuX.measure.filter.enable,
Sets filter count for SMU A:
Example
smua.measure.filter.count = 10
smuX.measure.filter.enable
Attribute Enables/disables filtered measurements.
Usage filter = smuX.measure.filter.enable
smuX.measure.filter.enable = filter
Set
filter
or
smuX.FILTER_OFF
0
or
smuX.FILTER_ON
1
This attribute enables or disables the filter.
Remarks •
The
•
reset
• The median filter uses a first-in, first-out stack. When the stack (filter count) becomes full,
the "middle-most" reading is returned. For each subsequent conversion placed into the
stack, the oldest reading is discarded. The stack is then re-sorted, yielding a new
reading. If the filter count is an even number, the reading returned is the average of the
two middle readings.
Details See "Filters" in
Also see smuX.measure.filter.count,
• The median filter uses a first-in, first-out stack. When the stack (filter count) becomes full,
the "middle-most" reading is returned. For each subsequent conversion placed into the
stack, the oldest reading is discarded. The stack is then re-sorted, yielding a new
reading. If the filter count is an even number, the reading returned is the average of the
two middle readings.
2600S-901-01 Rev. C / January 2008
X= SMU channel (a or b)
(Models 2635 and 2636 only)
X = SMU channel (a or b)
function sets the filter count to 1.
Section 6.
smuX.measure.filter.type
X = SMU channel (a or b)
to one of the following values:
function disables the filter.
Section 6.
smuX.measure.filter.type
Return to Section Topics
--Read the delay factor.
--Set the delay factor.
Increase the automatic delay by 2 times.
-- Reads filter count.
-- Writes filter count.
Set filter count from 1 to 100.
-- Reads on/off state of the filter.
-- Writes on/off state of the filter.
Disables the filter.
Enables the filter.
Section 12: Instrument Control Library
12-59