HP 492A Operating And Service Manual
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Model 492A/494A
SECTION
II
INSTALLATION
Section
II
Paragraphs
2-1
to
2-13
/
2-1.
MECHANICAL
INSPECTION.
2-2.
Unpack
the
instrument
upon
receipt
and
inspect
it
for
signs
of
phy
ical
damage
such
as
scratched
panel
surfaces,
broken
knobs,
etc.
If
there
is
any
apparent
damage,
file
a
claim
with
the
carrier
and
refer
to
the
warranty
page
in
this
manual.
2-3.
POWER
REQUIREMENTS.
2-4.
The
Model 492A and Model 494A
require
a
power
source
of
115
volts
± 10%,
single
phase,
50
to 60
cps,
which
can
deliver
approximately
225
watts.
2-5.
POWER
CABLE.
2-6.
For
the
protection
of
operating
personnel,
the
ational
Electrical
Manufacturers'
Association
(NEMA)
recommends
that
the
instrument
panel
and
cabinet
be
grounded.
This
instrument
is
equipped
with a
three-prong
conductor
power
cable
which, when
plugged
into
an
appropriate
receptacle,
grounds
the
instrument.
The
offset
pin on
the
power
cable
three-
prong
connector
is
the
ground
pin.
2-7.
To
preserve
the
protection
fearure
when
opera-
ting
the
instrument
from
a
two-contact
outlet,
use
a
three-prong
to
two-prong
adapter
and
connect
the
green
pigtail
on
the
adapter
to
ground.
2-8.
I
NST
ALLATION.
2-9.
The
only
special
precaution
necessary
for
in-
stalling
the
twt
amplifiers
is
that
they
should
not be
operated
close
to
very
large
magnetic
fields,
such
as
60-cycle
fields,
unless
externally
shielded.
While
the
twt
amplifiers
are
shielded
within
the
cabinet,
complete
protection
against
large
low-frequency
fields
would
require
more
shielding
than
is
practical
to
in-
clude
in
the
design.
2-10.
To
operate,
connect
the
instrument
to a
115-
volt
ac
power
source,
check
and
adjust
rube
operating
00144-2
currents
as
described
in
preliminary
operating
pro-
cedure,
section
1Il, and
connect
to
the
external
equip-
ment
with
coaxial
cables
terminated
in
standard
UG-
21D/U,
type
connectors.
2-11.
In
section
V, beginning with
paragraph
5-32,
is
a
list
of
performance
checks
for
this
instrument.
These
procedures
make
a good
test
as
part
of
incom-
ing
quality-control
inspection
following
initial
rurn-on.
2-12.
REPACKAGING
FOR
SHIPMENT.
2-13.
The
following
list
is
a
general
guide
for
re-
packaging
an
instrument
for
shipment.
If you
have
any
questions,
contact
your
authorized
Hewlett-
Packard
sales
representative.
a.
If
possible,
use
the
original
container
designed
for
the
instrument,
b.
Wrap
the
instrument
in
heavy
paper
or
plastic
before
placing
it
in
the
shipping
container.
c.
Use
plenty
of
packing
material
around
all
sides
of
the
instrument
and
protect
the
panel
with
card-
board
strips.
d.
Use
heavy
cardboard
carton
or
wooden box to
house
the
instrument
and
use
heavy
tape
or
metal
bands
to
seal
the
container.
e.
Mark
the
packing
box with
"Fragile",
"Delicate
Instrument",
etc.
Note
If
the
instrument
is
to
be
shipped
to
Hewlett-
Packard
Company
for
service
or
repair,
at-
tach
to
the
instrument
a
tag
identifying
the
owner
and
indicating
the
service
or
repair
to
be
accomplished.
In
any
correspondence
be
sure
to
identify
the
instrument
by
model
number,
serial
prefix,
and
serial
number.
2-1