Series 2600B System SourceMeter® Instrument Reference Manual
Section 7: TSP command reference
2600BS-901-01 Rev. B / May 2013
7-205
Also see
Filters
(on page 3-3)
reset()
(on page 7-160)
setup.recall()
(on page 7-180)
smuX.measure.filter.count
smuX.measure.filter.type
(on page 7-205)
smuX.reset()
(on page 7-216)
smuX.measure.filter.type
This command sets the type of filter used for measurements when the measurement filter is enabled.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Attribute (RW)
Yes
Instrument reset
SMU reset
Recall setup
Saved setup
1 (smuX.FILTER_REPEAT_AVG)
Usage
filterType
= smu
X
.measure.filter.type
smu
X
.measure.filter.type =
filterType
filterType
The filter type to use when filtering is enabled. Set to one of the following values:
0
or
smu
X
.FILTER_MOVING_AVG
: Selects the moving average filter
1
or
smu
X
.FILTER_REPEAT_AVG
: Selects the repeat filter
2
or
smu
X
.FILTER_MEDIAN
: Selects the median filter
X
SMU channel (for example,
smua.measure.filter.type
applies to SMU
Channel A)
Details
There are two averaging filter types and one median filter type available. For averaging filters, both repeating and
moving filter types are available.
For the repeating filter, the stack (filter count) is filled, and the conversions are averaged to yield a reading. The
stack is then cleared, and the process starts over.
The moving average filter uses a first-in, first-out stack. When the stack (filter count) becomes full, the
measurement conversions are averaged, yielding a reading. For each subsequent conversion placed into the
stack, the oldest conversion is discarded. The stack is re-averaged, yielding a new reading.
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.
Example
smua.measure.filter.type = 2
Selects the median filter for SMU channel A. Alternatively,
the value 2 may be replaced with
smua.FILTER_MEDIAN
.
Also see
Filters
(on page 3-3)
reset()
(on page 7-160)
setup.recall()
(on page 7-180)
smuX.measure.filter.count
smuX.measure.filter.enable
(on page 7-204)
smuX.reset()
(on page 7-216)
Summary of Contents for System SourceMeter 2601B
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