Specifications

[SENSe:]DATA:FIFO:COUNt:HALF?
[SENSe:]DATA:FIFO:COUNt:HALF? returnsa1iftheFIFO is at least half full
(contains at least 32,768 values) or 0 if FIFO is less than half-full.
Comments
·
DATA:FIFO:COUNT:HALF? is used as a fast method to poll the FIFO for the
half-full condition.
·
Returned Value: Numeric 1 or 0. The C-SCPI type is int16.
·
Related Commands: DATA:FIFO:HALF?
·
*RST Condition: FIFO empty
Command
Sequence
DATA:FIFO:COUNT:HALF? poll FIFO for half-full status
DATA:FIFO:HALF? returns 32768 values
[SENSe:]DATA:FIFO:HALF?
[SENSe:]DATA:FIFO:HALF? returns 32,768 values if the FIFO buffer is at least
half-full. This command provides a fast means of acquiring blocks of values from
the buffer.
Comments
·
For acquiring data from continuous algorithm executions, an application needs to
execute a DATA:FIFO:HALF? command and a read statement often enough to
keep up with the rate that values are being sent to the FIFO.
·
Use the DATA:FIFO:ALL? command to acquire the values remaining in the
FIFO buffer after the ABORT command has stopped execution.
·
The format of values returned is set using the FORMat[:DATA] command.
·
Returned Value: ASCII values are returned in the form ±1.234567E±123. For
example 13.325 volts would be +1.3325000E+001. Each value is followed by a
comma (,). A line feed (LF) and End-Or-Identify (EOI) follow the last value. The
C-SCPI data type is a string array.
REAL 32, REAL 64 and PACK 64, values are returned in the IEEE-488.2-1987
Definite Length Arbitrary Block Data format. This data return format is explained
in “Arbitrary Block Program Data” on page 180 of this chapter. For REAL 32,
each value is 4 bytes in length (the C-SCPI data type is a float32 array). For
REAL 64 and PACK 64, each value is 8 bytes in length (the C-SCPI data type is a
float64 array).
NOTE Algorithm values which are a positive overvoltage return IEEE +INF and a negative
overvoltage return IEEE -INF (see table on page 230 for actual values for each data
format).
VT1419A Command Reference
[SENSe]
Chapter 6 263
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