2400 Series SourceMeter
®
User’s Manual SCPI Command Reference 18-45
Acquire statistic
:DATA?
:CALCulate3:DATA? Read CALC3 result
Description This query command is used to perform the selected statistic operation
and read the result(s). The result(s) is always returned in ASCII format.
If the buffer is configured to store raw measured readings
(:TRACe:FEED SENSe1) and multiple functions were measured, the
selected statistic operation will be performed on all the measured read-
ings. For example, if voltage and current measurements were stored in
the buffer, then the selected statistic operation will be performed on both
readings. Statistics for multiple measurement functions are returned in
the following order:
voltage statistic, current statistic, resistance statistic.
Statistic operations are not performed on TIME and STATus data ele-
ments that are stored in the buffer.
If the buffer is configured to store the result of CALC1 or CALC2
(:TRACe:FEED CALC1 or CALC2), only one result will be returned by
this query command.
Notes:
1. If there is no data in the buffer, error -230, “Data corrupt or stale,”
will be generated.
2. If there are a lot of readings stored in the buffer, some statistic oper-
ations may take too long and cause a bus time-out error. To avoid
this, send the :CALA3:DATA? command and then wait for the
MAV (message available) bit in the Status Byte Register to set
before addressing the SourceMeter to talk. (See Section 15, “Status
Structure.”)
3. See Appendix C, “Data Flow,” for a detailed explanation on how
data flows through the various operation blocks of the SourceMeter.
It clarifies the types of readings that are acquired by the various
commands to read data.
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