D-12 Signal Processing Sequence and Data Flow Model 2750 Multimeter/Switch System User’s Manual
CALC2:IMM?
CALC2:IMM
CALC2:DATA?
Statistical information (minimum, maximum, mean, standard deviation, and peak-to-peak)
is available for the readings stored in the buffer (data store). When the desired calculation
is selected (using the CALC2:FORMat command), and CALC2 is enabled
(CALC2:STATe ON), use the CALC2:IMM? or CALC2:IMM command to perform the
calculation:
• When CALC2:IMM? is used, the statistic is calculated and result is returned.
• When CALC2:IMM is used to calculate the statistic, the CALC2:DATA? com-
mand is then used to return the result.
The CALC2:DATA? command does not initiate a calculate operation. It simply returns the
result of the last calculation.
If you calculate a statistic for an empty buffer, the number 9.910000E+37 will be returned
when it is read.
If you perform a calculation with no statistic selected (CALC2:FORM NONE) or CALC2
disabled (CALC2:STAT OFF), the result of the last statistic calculation will be returned
when a read operation (CALC2:IMM? or CALC2:DATA?) is performed. However, if there
was no calculation previously performed, the number 9.910000E+37 will instead be
returned.
Continuous measurement mode
With continuous initiation enabled (INIT:CONT ON), the instrument continuously per-
forms (and displays) measurements. Data flow is the same except that only one data array
is stored in the sample buffer at a time. The single data array is then fed to the other
enabled data flow blocks. When the next measurement occurs, that data array overwrites
the previous data array in the sample buffer. The new data is then fed to the other data flow
blocks. When SENS:DATA?, FETCh?, READ?, or CALC1:DATA? is sent, the latest data
array will be returned.
NOTE The READ? command tries to perform an INIT operation. This will cause error
-213 (Init ignored) to occur since the instrument is already initiating
measurements.
NOTE When the instrument is not in the continuous measurement mode, the
INIT:CONT ON command can be sent to enable continuous initiation. However,
if the sample count is >1, a setting conflict error (-221) will occur. Set the sam-
ple count to 1 (SAMP:COUN 1), and then send INIT:CONT ON.
2750-900-01.book Page 12 Wednesday, August 3, 2011 7:56 AM
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