6-18
Averaging Filter, Math, and Buffer
Model 6220/6221 Reference Manual
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TRACe:DATA:SELected? <start>, <count> – With this read command, you
can specify a list of consecutive buffer readings to return. Two parameters are
required for this command: <start> and <count>. The first reading in the buffer
is Rdg #0. Example: To return the first 20 readings in the buffer, send the fol-
lowing command: TRACe:DATA:SELected? 0, 20.
6.
Buffer data elements:
The following seven data elements can be included for each buffer location:
READing, TSTamp, UNITs, RNUMber, SOURce, COMPliance, and AVOLt-
age.
Elements in the list must be separated by a comma. At least one element
must in the list. Elements not listed will not be included in response message
for TRACe:DATA?.
As an alternative to listing the data elements, the DEFault or ALL parameter
can be used. DEFault selects the READing and TSTamp elements, and ALL
selects all seven elements.
7.
Buffer statistics read command:
CALC2:DATA? – Use this read command to read the result of the calculation.
If there is a significant amount of data in the buffer, some statistic operations
may take too long and cause a bus timeout error. To avoid this, send
CALC2:DATA? and then wait for the MAV (message available) bit in the Sta-
tus Byte Register to set before addressing the Model 622x talk. See
for details.
NOTE
Details on data elements are provided in
.
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