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Chapter 4 Command Reference
Introduction
:CALCulate Subsystems
Three :CALCulate subsystems (:CALCulate[1], :CALCulate2,
and :CALCulate3) perform post-acquisition data processing and data transfer of
the corresponding results. Functions in the SENSe subsystem are related to data
acquisition, while the :CALCulate systems operate on the data acquired by a
SENSe function as shown in Figure 4-1.
The :CALCulate subsystems are logically between the :SENSe subsystem and the
data output to either the bus or display. When a measurement is initiated (by a
:MEASure, :READ, or an :INITiate command), the :SENSe subsystem collects
data. This data is transformed by :CALCulate[1|2|3], as specified, and then passed
on to the selected output. In effect, the collection of new data "initiates" the
:CALCulate subsystems. The :CALCulate subsystems may also be directed by
command to transform, making it possible to change the configuration of
:CALCulate and consequently derive a different set of results from the same
SENSe data set without re-acquiring SENSe data.
Calculated results are available (valid) until new results are computed or until
relevant instrument state is changed.
The :CALCulate3 subsystem consists of two sub-blocks as shown in Figure 4-1.
The data flows through the sub-blocks in a serial fashion. The manner in which
these sub-blocks are arranged is specified in the :CALC3:PATH? query.
The :CALCulate[1|2|3] settings are not used when measuring Totalize or Voltage
Peaks (voltage minimum, maximum,
or peak-to-peak).
Not until :CALCulate[1]:MATH:STATe is set to ON will any of the
NOTE
:CALCulate[1] settings or :TRACe[:DATA] settings be used.
Not until :CALCulate2:LIMit:STATe is set to ON will any of the :CALCulate2
settings be used.
Not until :CALCulate3:LFILter:STATe is set to ON will any of the
:CALCulate3:LFILter settings be used.
Not until :CALCulate3:AVERage:STATe is set to ON will any of the
:CALCulate3:AVERage settings be used.
Programming Guide
4-5
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