Preparation
for
Use
Before
turning
the
power
on,
the
4285A
and
its
accessories
must
be
installed
and
interconnected
correctly
.
P
ower
Requirements
The
4285A
requires
the
following
power
source:
V
oltage
:
90
to
132
V
ac
,
198
to
252
V
ac
Frequency
:
47
to
66
Hz
P
ower
:
200
V
A
maximum
Line
V
oltage
and
Fuse
Selection
Figure
1-1
illustrates
the
line
voltage
selection
switch
and
fuseholder
on
the
instrument's
rear
panel.
Figure
1-1.
Line
V
oltage
Selector
Caution
Before
connecting
the
instrument
to
the
power
source
,
make
sure
that
the
correct
fuse
has
been
installed
and
the
Line
V
oltage
Selection
Switch
is
correctly
set.
Line
V
oltage
Selection
Select
the
proper
voltage
selector
according
to
the
T
able
1-1.
T
able
1-1.
Line
V
oltage
Selection
V
oltage
Selector
Line
V
oltage
115
V
90{132
V
,
47{66
Hz
230
V
198{252
V
,
47{66
Hz
Fuse
Selection
Select
proper
fuse
according
to
the
T
able
1-2 .
Current
ratings
for
the
fuse
are
printed
under
the
fuseholder
on
the
rear
panel,
and
are
listed,
along
with
the
fuse's
Agilent
part
number
,
in
T
able
1-2 .
1-2
Before
Y
ou
Begin
