Specifications

NOTE *TST? leaves the instrument in its power-on reset state. This means that the ASC,7
data format is set even if it was set to something else before executing *TST?. If it is
necessary to read the FIFO for test information, set the format after *TST? and
before reading the FIFO.
·
Related Commands: [SENSe:]DATA:FIFO:¼?, [SENSe:]DATA:CVTable?,
MEMory subsystem and FETCh? Also see how DIAG:IEEE can modify
REAL,32 returned values.
·
*RST Condition: ASCII, 7
·
After *RST/Power-on, each channel location in the CVT contains the IEEE-754
value “Not-a-number” (NaN). Channel readings which are a positive overvoltage
return IEEE +INF and a negative overvoltage return IEEE -INF. The NaN, +INF,
and -INF values for each format are shown in the following table.
Format IEEE Term
Value
Meaning
ASCii +INF +9.9E37 Positive Overload
-INF -9.9E37 Negative Overload
NaN +9.91E37 No Reading
REAL,32 +INF 7F800000
16
Positive Overload
-INF FF800000
16
Negative Overload
NaN 7FFFFFFF
16
No Reading
REAL,64 +INF 7FF000...00
16
Positive Overload
-INF FFF000...00
16
Negative Overload
NaN 7FFF...FF
16
No Reading
PACKed,64 +INF 47D2 9EAD 3677 AF6F
16
(+9.0E37
10
)
Positive Overload
-INF C7D2 9EAD 3677 AF6F
16
(-9.0E37
10
)
Negative Overload
NaN 47D2 A37D CED4 6143
16
(+9.91E37
10
)
No Reading
Usage FORMAT REAL Set format to IEEE 32-bit Floating Point
FORM REAL, 64 Set format to IEEE 64-bit Floating Point
FORMAT ASCII, 7 Set format to 7-bit ASCII
FORMat[:DATA]?
FORMat[:DATA]? returns the currently set response data format for readings.
Comments
·
Returned Value: Returns REAL, +32 | REAL, +64 | PACK, +64 | ASC, +7. The
C-SCPI type is string, int16.
·
Related Commands: FORMAT
VT1419A Command Reference
FORMat
230 Chapter 6
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