OPERATING
INSTRUCTIONS
CONTROLS
AND
CONNECTORS
age line voltage
to
which
the
instrument
is
to
be connected.
Replace
the
cover and tighten
the
two captive screws.
Before applying power
to
the
instrument, check
that
the
indicating tabs on
the
switch bars are protruding through
the
correct
holes for
the
desired nominal line voltage and
regulating range.
Vertical (both channels
except
as
noted)
VOLTS/DIV Selects vertical deflection factor
(VAR control
must
be in calibrated
position for indicated deflection
factor).
OPERATING
VOLTAGE
~~
This
instrument
is
designed
for
operation
from
a
power
source
with
its
neutral
at
or
near earth
(ground)
potential
with
aseparate safety-earth con-
ductor.
It
is
not
intended
for
operation
from
two
phases
of
amultiphase system,
or
across the
legs
of
a
single-phase three-wire system.
The
453A
can be operated from
either
a115-volt
or
a
230-volt nominal line voltage source.
The
Line Voltage
Selector assembly on
the
rear panel converts this instru-
ment
from one operating voltage
to
the
other. This
assembly also includes
the
fuses
that
provide
protection
for
the
line-input portion
of
the
instrument.
To
convert from
115-volt to 230-volt nominal line voltage,
or
vice versa,
remove
the
cover from
the
Line Voltage Selector assembly.
Then, pull
out
the
Selector switch bar and plug it back
into
the
remaining holes. Change
the
line-cord power plug
to
match
the
power-source receptacle
or
use a115-
to
230-volt
adapter.
To
change regulating ranges, pull
out
the
Range
Selector switch bar, slide
it
to
the
desired position and plug
it back in. Select arange which
is
centered
about
the
aver-
Display
INTENSITY
FOCUS
BEAM
FINDER
Controls brightness
of
display.
Provides
adjustment
for well-defined
display.
Compresses display with
in
graticule
area,
independent
of
display posi-
tion
or
applied signals.
®
453A
5
