Real Data Format - Agilent Technologies 4349B Manual

4349B
REAL
This data eld is initiated by a unique code, the number sign (#). The second byte,
\ < num digit > " designates the number of the bytes for the \ < num bytes > ". \ < num bytes > "
designates \ < data bytes > " length. \ < new line > ^END" is the response message terminator.
\ < data bytes > " contains the data in the IEEE 754 oating point numbers of 64-bits. This is
the same data format used by the HP technical computers, such as the HP 9000 series 200/300
computers.
The real number RN represented in oating point format are provided by following formula:
When 0 < e < 11111111111 (2047)
2
RN = ( 1) 2
S (EXP-1023)
When e = 0
2
RN = ( 1) 2
S -1022
When e = 0, f = 0
RN = 0
Where,
s value of sign part (binary)
e value of exponential part (binary)
EXP decimal expression of exponential part
f decimal expression of fractional part
Figure 5-11. Real Data Format
2
(1 + f/2 )
52
2
(f/2 )
52
GPIB Reference 5-41