[:Sense[1]]:<Function>:Average:tcontrol - Keithley 2450 Reference Manual

Model 2450 Interactive SourceMeter® Instrument Reference Manual
[:SENSe[1]]:<function>:AVERage:TCONtrol
This command set the type of averaging filter that is used for measurements for the selected function when the
measurement filter is enabled.
Type
Command and query
Usage
[:SENSe[1]]:<function>:AVERage:TCONtrol <type>
[:SENSe[1]]:<function>:AVERage:TCONtrol?
<function>
<type>
Details
This command selects the type of averaging filter: repeating average or moving average.
When the repeating average filter is selected, a set of measurements are made, which are stored in a
measurement stack and averaged together to produce the averaged sample. Once the averaged sample is
produced, the stack is flushed and the next set of data is used to produce the next averaged sample. This type of
filter is the slowest, since the stack has to be completely filled before an averaged sample can be produced.
When the moving average filter is selected, the measurements are added to the stack continuously on a first-in,
first-out basis. As each measurement is made, the oldest measurement is removed from the stack. A new
averaged sample is produced using the new measurement and the data that is now in the stack.
Note that when the moving average filter is first selected, the stack is empty. When the first measurement is
made, it is copied into all the stack locations to fill the stack. A true average is not produced until the stack is
filled with new measurements. The size of the stack is determined by the filter count setting.
The repeating average filter produces slower results, but produces more stable results than the moving average
filter. For either method, the greater the number of measurements that are averaged, the slower the averaged
sample rate, but the lower the noise error. Trade-offs between speed and noise are normally required to tailor the
instrumentation to your measurement application.
If you send this command without the <function> parameter, it sets the filter type for all functions.
Example 1
CURR:AVER:COUNT 10
CURR:AVER:TCON MOV
CURR:AVER ON
Example 2
RES:AVER:COUNT 10
RES:AVER:TCON MOV
RES:AVER ON
2450-901-01 Rev. B/September 2013
Affected by
Recall settings
Instrument reset
Power cycle
Measure configuration list
The measurement function to which this setting applies:
Current: CURRent[:DC]
•
Resistance: RESistance
•
Voltage: VOLTage[:DC]
•
The filter type to use when filtering is enabled; set to one of the following values:
Repeating filter: REPeat
•
Moving filter: MOVing
•
Section 6: SCPI command reference
Where saved
Save settings
Measure configuration list
Set the averaging filter type to moving average,
with a filter count of 10.
Enable the averaging filter.
Set the averaging filter type to moving average,
with a filter count of 10.
Enable the averaging filter.
Default value
REP
6-45