When Data Buffer Memory Is Used - Keysight E4980A User Manual

Overview of Remote Control
Data Buffer Memory
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When Data Buffer Memory is Used

Follow the rules below when using the data buffer memory function.
o
o
o
o
Data A
Data B
Status
BIN No. or IN/OUT
o
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PRINT D(*)
OUTPUT @Adrs;"MEM:CLE DBUF"
END
Measurement data collected after sending the :MMEM:FILL DBUF
command to use the data buffer memory function are stored in the data
buffer memory in the order measured.
When the E4980A/AL is triggered using the :TRIG command, the
measurement results are stored only in the data buffer memory. Therefore,
you do not have to clear the output buffer after each measurement.
*When the E4980A/AL is triggered using the *TRG or TRIGGER (GET) bus
command, the measurement results are stored in both the data buffer
memory and the output buffer. Therefore, it is necessary to read the
measurement results in the output buffer using the controller and to clear
the output buffer each time a measurement is made. If you fail to do this, an
error (-410, "Query INTERRUPTED") will occur.
The output buffer is the area where measurement data are stored when the
E4980A/AL is triggered without using the data buffer memory. The data
buffer memory is off in the E4980A/AL's initial state, and measurement data
are stored in the output buffer. It is necessary to read data in the output
buffer using the controller and clear the output buffer each time a
measurement is made.
When the number of sets of measurement data exceeds the capacity of the
buffer memory, all of the overflowed measurement data will be lost, an error
(90, "Data Memory Overflow") will occur, and bit 3 of the standard event
status register will be set to 1. When you store new data into the buffer data
memory, use the :MEM:CLE DBUF command to clear the data buffer
memory.
When the number of sets of measurement data is less than the capacity of
the buffer memory, the following data, instead of the actual measurement
data, are input to the unused portion of the data buffer memory.
When the data buffer memory function is used during a list sweep
measurement, the measurement result for one sweep point is stored as one
set of measurement data. Therefore, when two or more sweep points are the
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9.9E37
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Keysight E4980A/AL Precision LCR Meter