Keithley SourceMeter 2400, User Manual, Page: 533 / 594

C-4 Data Flow 2400 Series SourceMeter
®
User’s Manual
CALCulate[1]:DATA?
If CALCulate1 is enabled, Sample Buffer data is fed to the CALC1 block where the
results for the selected math expression are calculated. The CALC1:DATA? command will
read the results of the math expression. If, for example, 20 data arrays in the Sample
Buffer yield 10 math expression results, then CALC1:DATA? will acquire 10 readings
(results).
CALCulate2:DATA?
If CALCulate2 is enabled, Sample Buffer data and CALC1 math expression results
become available to the CALC2 block for limit testing. Depending on the selected feed,
limit testing can be performed on the voltage, current, resistance, or timestamp readings of
Sample Buffer data, or it can be performed on the CALC1 math expression results. If
NULL (rel) is enabled, the readings used for limit testing will be the results of the null
operation.
The CALCulate2:DATA? command acquires the readings used for limit testing.
TRACe:DATA?
If the data store is enabled, Sample Buffer data, CALC1 results and CALC2 readings
become available to the TRACE block for storage. The selected feed determines which
group of readings are stored.
The TRACe:DATA? command reads the entire contents of the data store.
CALCulate3:DATA?
Statistical information (minimum, maximum, mean, standard deviation, and peak-to-peak)
is available for measure readings stored in the buffer. If the readings in the data store came
directly from the Sample Buffer, then the selected statistic calculation will be performed
on all enabled measurement functions. The calculation results are returned in the follow-
ing fixed order:
VOLTage result, CURRent result, RESistance result
When the TRACE buffer is feeding off CALC1 or CALC2, the selected statistic calcula-
tion is performed on the selected feed. Thus, a single statistic result is acquired for each
reading stored in the data store.
The CALCulate3:DATA? command acquires the results of the selected calculation.
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