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HP 1630D User Manual

HP 1630D
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Model
1630A/D/G

Using
HP-IB
or
HP-IL
Interface
Real
Data
(R)
Format
Data
that
is
structured
using
the
floating
point
system
is
indicated
with
the
abbreviation
(R)
in
the
contents
column
of
the
learn
string
.
The
floating
point
format
used
in
the
learn strings
consists
of
32
bits
as
shown
in
the
following
arrangement
.
BYTE
0

BYTE
1

BYTE
2

BYTE
3
EEEEEEES
.
MMMMMMMM
MMMMMMMMMMMMMMMM
Where
:
EEEEEEE
=
7-bit
2's
Complement
Power
of
2
S=
Sign
of
Mantissa
(O=Positive,
1=Negative)
M
. . . . .
M
=
24-bit
Unsigned
Mantissa
(Fraction)
NOTE
When
acquisition
is
timing
trace,
this
number
refers
to
number
of
marks
or
number
of
sample
period
intervals
.
The
floating
point
format
is
an
efficient
method
of
representing
large
numbers
using
minimum
memory
space
.
The
interpretation
of
a
particular
parameter
using
real
format
is
dependent
on
the
context
of
the
parameter
.
A
real
number
for
a
parameter
involving
"time"
must
be
multiplied
bya
standard
time
increment
which
is
peculiar
to
that
learn
string
.
An
example
is
in
the
Timing
Trace
learn
string
where
the
real
numbers
obtained
must
be
multiplied
by
the
sample
period
to
obtain
the
proper
time
.
However,
in
the
State
Time
Interval
Overview
Learn
String,
the
number
obtained
is
always
in
seconds
which
is
essentially
the
same
as
multiplying
by
one
.
In
a case
where
a
parameter
does
not
involve
time,
the
decoded
real
number
is
directly
translatable
.
This
is
evident
in
the
Timing
Trace
Learn
String
parameter
for
the
number
of
marks
or
runs
.
The
following
example
is
from
a
State
Time
Interval
Learn
String
.
A
run
was
made
which
acquired a
total
of
76
samples
in
145
.5
jsec
.
The
first
byte
(byte
14)
is
the
exponent
and
is
decoded
as
:
indicates
positive
number
indicates
binary
power
of 27
The
least
significant
bit
in
binary
representation
of
the
byte
indicates
the
number
is
positive
.
The
remaining
seven
bits
are
then
considered
a
separate
binary
number
which,
in
this
case
equals
seven
.
There
are
two
ways
to
interpret
remainder
of
the
number
(bytes
15
through
17)
.
Hexadecimal
:
0 E
Binary
:
0000
1110
0000
0111
(EXPONENT)
:
0 7
Parameter
:
Total
Number
of
States
Byte
Position
:
14 15
16
17
Format
:
(R) (R) (R) (R)
Hexadecimal
:
0E
98 00
00

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HP 1630D Specifications

General IconGeneral
BrandHP
Model1630D
CategoryMeasuring Instruments
LanguageEnglish

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