Keithley 2303, Руководство пользователя

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10-6 DISPlay, FORMat, and SYSTem
FORMat:BORDer <name>
Specify binary byte order
Parameters
<name> = NORMal Normal byte order for binary formats
SWAPped Reverse byte order for binary formats
This command is used to control the byte order for the IEEE-754 binary formats. For normal
byte order, the data format for each element is sent as follows:
Byte 1 Byte 2 Byte 3 Byte 4 (Single precision)
Byte 1 Byte 2 • • • Byte 8 (Double precision)
For reverse byte order, the data format for each element is sent as follows:
Byte 4 Byte 3 Byte 2 Byte 1 (Single precision)
Byte 8 Byte 7 • • • Byte 1 (Double precision)
The "#,0" header is not affected by this command. The header is always sent at the beginning
of the data string for each measurement conversion.
The ASCII data format can only be sent in the normal byte order. The SWAPped selection is
ignored when the ASCII format is selected.
Byte 1
7 0
Header Byte 2
7 0
Byte 7
7 0
Byte 8
7 0
s e f
s = sign bit (0 = positive, 1 = negative)
e = exponent bits (11)
f = fraction bits (52)
Normal byte order shown. For swapped byte order,
bytes sent in reverse order: Header, Byte 8,
Byte 7 .... Byte 1.
The Header is only sent once for each measurement conversion.
Bytes 3, 4, 5, and 6 not shown.
# 0
Figure 10-2
IEEE-754 double precision data format