Section
ll
2-20. Place
instrument in original container
with appropri-
ate
packing
matcrial
and seat well with strong tape or metal
bands. If original container is not
ayailable,
one
can be
purchased
from
your
nearest
-hp'
Sales and Service
Office,
2-21. If original
container is
not
to be used,
proceed
as
follows:
a, Wrap
instrument in
healy paper,
or
plastic before
placing
in
an
inner
conlainer.
b.
Place
packing
material around all sides ofinstrument
and
protect panel
face with
cardboard strips.
c. Place instrument and
inner
container in a heavy
calton or wooden box and seal with strong tape or metal
bands.
d. Mark
shipping container "DELICATE INSTRU-
MENT",
FRAGILE'" EtC.
2.22. INTERFACING
(Options
002,003 only).
NOTF:
The
3575A Options 002 and 003 are identicol except that
Option 003 instruments use high-true logic
for
the BCD
outputs. ln
qll
other
respects,
the
following
ittforrnation
for
Option 002 instruments
also applies
to
Option 003
instru-
ments.
2-23.
The 3575A
Option 002
supplies BCD outputs that
correspond
with the
panet meter readings
and is equipped
for
remote control
of all
front panel
functions, ranges and
settings
(except
LINE ON/OFF).
The remote input
and
output lines are available
at the
rear
panel
Interface
connector, A19Jl.
2-24.
Fig)te 3-9
(Section
III) illustrates the 3575A Option
002
Interface connector
as
viewed from the rear of the
instrument.
The connector
drawing and the
table within
the
figure
provides
complete
input/output
and control infor-
mation. A
50-pin mating connector
(-hp-
l25l-0086*)and
a
46{onductor cable are
required to connect
all
input
and
output lines, cicuit
Sround
and
+
5 Vdc to an
external
controller
or
I/O card.
2-25.
Computer
lnte
acing,
2-26.
For
interfacing the Model 3575A
Option 002 to an
-hp-
computer, it will be necessary to utilize
the informa'
tion in this Inanual to
develop
I/O
circuitry and
software
that n)eets
individual system requirel]lents.
For more
Model
3575A
detailed
information concerning the 3575A
Option 002,
refer to
Paragraph
3-71.
2-27. Printer I nterfacing.+*
2-28. The 3575A Option 002 can be connected directly to
an
-hp-
printer (Model
50508 or
5055A)
using
the
-hp-
562A-l6C printer
cable. The 3575A BCD
output
and data
flag
connections
are
compatible
with the 562A-l6C cable
and modifications
to
the
printer
or
pdnter
cable are
not
required. The
printer,
however, must be set
or wired to
accept
ground-trus
BCD
inputs ard an
external
ground
Iead
must
be connected between the
printer
chassis
and the
35754
chassis. In addition, there
are two minor modifi-
cations that should be
performed
on the 3575A:
a.
The
l-ocal/Remote control line
(J1 pin
50) is
automatically
grounded
when the
562A-l6C
printer
cable is
connected. Grounding
the Local/Remote
line enables the
timing circuits in the 35754 but also disables the
front
panel
controls and enables the remote control lines. Besides
being
inaccessible with the
pdnter
cable connected, the
remote
control lines
(Jl
pins
9 through
12,34
through
37)
are connected to the BCD input lines that control unused
printer
columns, 5 and 6. If remote contol operation is
desired,
it
will be necessary
to
fabdcate
an
adapter that will
isolate
the
unused
printer-input
lines and
permit
external
connections to the 3575A control lines. If
front panel
operation
is desired, connect thejumper
wire
on the 3575A
lnterface
Assembly
(4168)
between
points
I and 3
(see
Paragraph
3-86).
b.
When
using a
printer
it is
necessary
to
supply a
Remote
Measure command to the 3575A to initiate the
measurement cycle. When
the
printer
cable is connected to
the 3575A, the Remote Measure line
(Jl pin
2l) is not
accessible. For
this reason, a test
point
labeled "TRIG-
CER"
is
provided
on
the Intedace Assembly, 4168. The
'lrigger"
test
point
is connected directly to
the
Remote
Measure line. For convenience, install
a
female
BNC
connector (-hp-
1250-0083) in
one of
the
holes provided on
the
rear panel (Item
13, Figure 3-2) and connect a short
piece
of wire between
the
BNC connector and
the
'higger"
test
point
on
Al68. Apply the Remote Measure command
to the BNC connector.(Also
see
Paragraph
3-80)
NOTE
The
562A-16C
pinter
cable does not
prot
ide a solid
ground
connection
bet\t)een
the
printer
and the 3575A.
For
this reason,
it
is
necessary to connect an
extemal
ground
lead
(short
piece
of copp*
braid)
between
the
pinter
chassis
and the 35754 chassis.
2-29.
For
further information
concerning
the use of a
printer
with the
35754 Option 002, refer to Paragraph
3-87
.
*
Cinch
No.57 3050G375
**
For Option 003 instruments,
the
printer
must be set or wired to
accept high-true BCD inpuls.
2.2
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