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2600S-901-01 Rev. C / January 2008
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12-59
Series 2600 System SourceMeter® Instruments Reference Manual
Section 12: Instrument Control Library
smuX.measure.delayfactor
X= SMU channel (a or b)
(Models 2635 and 2636 only)
Attribute
This attribute is a multiplier to smuX.DELAY_AUTO measurement delays.
Usage
delayfactor = smuX.measure.delayfactor
--Read the delay factor.
smuX.measure.delayfactor = delayfactor
--Set the delay factor.
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
Example
smuX.measure.delayfactor = 2.0
Increase the automatic delay by 2 times.
smuX.measure.filter.count
X = SMU channel (a or b)
Attribute
Number of measured readings to yield one filtered measurement.
Usage
count = smuX.measure.filter.count
-- Reads filter count.
smuX.measure.filter.count = count
-- Writes filter count.
count
Set filter count from 1 to 100.
Remarks
•
This attribute is the number of measurements that will be performed to yield one
filtered measurement.
•
The
reset
function sets the filter count to 1.
Details
See “
” in
Also see
Example
Sets filter count for SMU A:
smua.measure.filter.count = 10
smuX.measure.filter.enable
X = SMU channel (a or b)
Attribute
Enables/disables filtered measurements.
Usage
filter = smuX.measure.filter.enable
-- Reads on/off state of the filter.
smuX.measure.filter.enable = filter
-- Writes on/off state of the filter.
Set
filter
to one of the following values:
0
or
smuX.FILTER_OFF
Disables the filter.
1
or
smuX.FILTER_ON
Enables the filter.
Remarks
•
This attribute enables or disables the filter.
•
The
reset
function disables the filter.
• 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 “
” in
Also see
,
• 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.