HP 8508A - Page 21

Se Re eR B RBS ERB ea OHeeeeeeeee ee egeen
Installation
2-10
HEWLETT-PACKARD
INTERFACE
BUS
(HP-IB)
This
section
contains
information
for
installing
the
HP
8508A
Vector
Voltmeter
into
a
Hewlett-Packard
Interface
Bus
(HP-IB)
system.
P
The
HP-IB
is
Hewlett-Packard’s
implementation
of
IEEE
Standard
488-1978
(Digital
Interface
for
Programmable
Instrumentation).
This
standard
defines
a
physical
interface
and
protocol
which
enables
the
remote
control
of
instrumentation
systems.
_
2-11
HP-IB
CONNECTOR
Logic Levels
The HP-IB logic levels are TTL
compatible ie. the true (1) state is
0106
d103
feiterd
0101
0108
0107
O106
0105
0
to
+0.5V
DC
and
the
false
(0)
signa.
common
{il
(Za)
Gal|]
sweco
state
is
+2.5
to
+5V
DC.
SIGNAL
COMMON
TwiSTED
with
pins
33
{{1(29)
(Dit
arn
SIGNAL
COMMON
TWISTED
WITH
PIN
10
(12)}|}
sro
_
Mating
Connector
SIGNAL
COMMON
TWISTED
WITH
PIN
9
{I|(2i)
CEI|I]
tec
SIGNAL
COMMON
TWISTED
WITH
PIN
8
|||
(20).
GE)
|i]
Noac
HP
1251-0293:
_
SIGNAL
COMMON
TWISTED
WITH
PIN
7
H/(1)
CO]i|
nrFo
Amphenol
57-302040
SIGNAL
COMMON
TWISTEO
WITH
PIN
6
|||
(4)
CEI}
av
ren
|)
()]]
€or
fe)
3]
fa
oD
TYPE 57 MICRORIBBON CONECTOR ~
Figure
2-3.
HP-IB
(rear
panel)
Connector
The
HP-IB
connector
on
the
rear
panel
of
the
HP
8508A
provides
the
physical
interface
to
connect
the
HP
8508A
into
an
HP-IB
system.
Figure
2-3
illustrates
the
connector
pin
configuration.
Devices
in
the
HP-IB
system
may
be
interconnected
in
any
suitable
arrangement
(star,
delta,
etc)
using
the
HP-IB
cables
listed
in
Table
2-4.
However,
the
cable
length
restrictions
should
be
observed.
2-5