Filter
Top Products
Model
3490A
Section
II
Table
2-2.
General
Purpose
Interface
Bus
Connectors.
Description
Mates
with
-hp-
Part
No.
Amphenol
No.
A.
B.
a
D.
Cable to
chassis
plug
with hood
and clamp
Cable to
chassis Receptacle
with hood
and clamp
Rack
and
panel plug
Rack and
panel
Receptacle
Rear
panel
or
with
B or
D.
AorC
Rear
panel
or
with
B or
D.
AorC
1251-0293
'1251-0431
1
251
-0389
1
251
-0388
51-30240
57-60240
57-10240
57-20240
GPIB
BUS
CONNECTOR
Jl2
OUTGUARD
GROUND
*
ro(oF@
9999f
n^^A
JJJJJ
8ä;;'iEFq8ä+
6
Mating
Connector:
-hp-
Part
No. 1251
4293
Amphenol
No.57-3O24O
Mating
Cables:
10631A
3
ft.
10631
B
6
ft.
10631C
12
ft.
LOGIC
LEVELS
H
preceding
signal
name
or as first letter
of mnemonic
indicates
signal
is
HIGH true;
L indicates
LOW true.
Input
Signals:
Each
input
line
is terminated
with
3
kO to
+
5 V
and
6.2 kO to
ground,
and
one TTL
load.
Output
Signals:
Each
output
can
drive 1
S
GPI
B loads.
The output
is
an
open{ollector
driver
capable
of sinking
4g mA
at
O.4
V output.
SIGNALS
LMRE
L Multiple
Response
Enable
allows
all units
on the
GPIB
to
be addressed
or unaddressed
by
the control-
ler.
LSRO
L
Service
Request indicates
that
the
34904 wants the
attention
of the
controller.
LEOP
L End
Output
is
used
by controller
to
terminate
all
activity
on the
bus.
HDAC
H
Data
Accepted
indicates
34904
has
accepted
data.
Returns
to
LOW
when
34904
is finished
processing
data.
HRFD
HIGH,
LDAV
L
Data
Valid
indicates
valid
output
data
is
available
from the
34904
if
addressed
to
talk,
or input
data is
available if
3490A
is
addressed
to
listen
and MRE
is
HIGH.
Address
is
valid if
MRE
is LOW.
LREN
L Remote
Enable
enables
the
34gOA to
be
placed
in
the
Remote
mode.
LDIO1 through
LDIOS
L
Data
Input/Output
lines
carry
information
in
octal
form
to the
34904 if
addressed
to listen
or
from
the
3490A if
addressed
to
talk_
'Outguad
ground
is
isolated
from
inguard circuit
common
(input
Low terminall
and chassis
(power
linel ground
and
may
be
floated
a maximum
of 40 V
above
chassis.
Figure
2-9.
General Purpose
lnterface
Bus
Connections.
a1