Agilent Technologies 4349B - Real Data Format

4349B
REAL
Figure
5-11.
Real
Data
F
ormat
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)
RN =
( 0
1)
S
2 2
(EXP-1023)
2 (1
+f/2
52
)
When e
=0
RN = (
0 1)
S
2 2
-1022
2 (f/2
52
)
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
GPIB Reference 5-41