5.6 Command Explanation
5-52 ZM2371/ZM2372
:FORMat[:DATA] {ASCii|REAL[,64]|PACKed}
:FORMat[:DATA]?
Description: Sets/queries the data transfer format.
The set data transfer format is applied to the response message
of :DATA[:DATA]?, :FETCh?, or :READ? query.
Parameters: ASCii ASCII format (NR1/NR2/NR3, character string)
REAL[ ,64] Real number format (double-precision floating point,
64-bit binary)
PACKed Packed format (display digit fixed ASCII format)
Setting example: :FORM ASC
Sets the data transfer format to ASCII.
Response: {ASC|REAL|PACK}
Query example: :FORM?
Response example: ASC
The data transfer format is ASCII.
ASCII format
The data is expressed with characters, and respective characters are transferred with ASCII
codes.
Depending on the parameter, a numeric value is transferred in either of the following
formats:
NR1 Integer (ex. : +123)
NR2 Explicit decimal point format not having exponent (ex. : +0.12345)
NR3 Explicit decimal point format having exponent (ex. : +123456E-07)
When multiple numeric values are transferred, numeric values are separated with a comma
(,). At the end, a message terminator (for instance, LF^EOI) is added.
Real number format
The data is transferred in the 64-bit double-precision floating point format in accordance
with IEEE 754.
When multiple numeric values are transferred, all data are expressed in the
double-precision floating point format.
Repeat
# <number of digits> <number of bytes> <data> <message terminator>
# # is attached at the leading position
<number of digits> Number of digits of character string that ASCII
indicates the number of bytes (1 byte)
<number of bytes> Number of bytes of all data (multiples of 8)
<data> Double-precision floating point (8 bytes) Binary
Sign 1 bit, exponential part 11 bits, decimal part 52 bits from
higher-order bit.
Data are transferred from most significant byte toward lower bytes in
order.
When multiple numeric data are transferred, they are fed successively without separating
them with a comma (,).
At the end, a message terminator is added. Note that a message terminator is added at the
end, different from the definite length arbitrary block specified by the IEEE 488.2 Standard.
To Next Page
