desired station. Then, rock the
TUNING
knob
slightly back
and
forth
until the maximum
reading
is
obtained on the SIGNAL-STRENGTH
Meter. The
FM
TUNING
Meter
is
not
used
for
AM.
FM:
Set
the SELECTOR Switch
to
"FM"
and
tune
to
the desired station. Then, slowly rock
the
TUNING
knob back
and
forth
until
the
FM
TUNING Meter points
to
the center
scale
po
is-
tion.
FM
MUTING SWITCH
When
tuning
to
FM
broadcasts with the
FM
MUT-
ING Switch in its
"in"
position, the muting circuit
will eliminate inter-station
noise.
To
prevent
muting
of
very weak stations along with the
noise,
the muting function may
be
turned
off
by
releasing
the
FM
MUTING pushswitch
to
the
"out"
position.
VOLUME
This control regulates volume
of
all
four
channels
simultaneously.
DOLBY SWITCH
This switch
sets
the Dolby noise-reduction circuit
for
record or playback
and
also
switches the
Meter Mode· from SIGNAL-STRENGTH
to
DOLBY
CAL
LEVEL, or
vice-versa.
With the
DOLBY Switch placed in
"OFF"
position, the
Meter will
be
used
as
a SIGNAL-STRENGTH
Meter; in all other positions,
as
a DOLBY
LEVEL
Meter.
DOLBY FM: This position
is
used
for
listening
to
Dolbyized FM broadcasts. The Dolby
FM
level
has
been
pre-adjusted
at
the factory.
PLAY:This·'lJosition
is
used
to
play back a
Dolbyized source (except FM).
OFF: With this position, the Dolby circuit
is
by-passed
and
the
input
signals
are
directly
applied
to
both TAPE MONITOR OUT jacks
and
amplifiers.
RECORD
I: For making a Dolbyized recording
from
an
in-coming
"flat"
(non-Dolbyized) signal.
When
the MONITOR Switch
is
set
to
the
SOURCE position, the
"flat"
signal
will
be
heard.
When
making a Dolby recording
and
utilizing a
three-head tape recorder, full advantage
of
the
4300's 4-process Dolby System
can
be
ap-
preciated.
When
the 4300's MONITOR Switch
is
in the TAPE 1 or TAPE 2 position, the
signal
heard will
be
"flat",
Le.,
it
will
be
the sound
produced after the record
and
playback Dolby
process
has
been
completed.
RECORD
IT:
For making a
"flat"
(non·Dolbyiz-
ed)
recording from
an
in-coming Dolbyized
signal.
Regardless
of
the position
of
the MONITOR
Switch, a
"flat"
signal
will
be
heard.
For further details on the
use
of
the DOLBY
Switch, refer
to
the
"Dolby
Mode Chart"
on
page
16.
RECORD
LEVEL
(L) (R)
These
knobs control the record level
of
the
signals
to
be
recorded through the Dolby unit. Adjust
the knobs
so
that the
Level
Meter pointers
of
the tape recorder do
not
exceed
the
OVU
level.
PLAY
CAL. (L) (R)
These
knobs adjust the playback outputs from a
tape deck
to
the proper Dolby level.
400Hz TONE SWITCH
This
is
used
for
calibration
of
the record
input
level
of
the tape deck.
When
the switch
is
depressed,
the built-in oscillator operates
and
a
sine
wave
signal
output
of
580mV
will
be
applied
to
the four TAPE MONITOR OUT jacks.
10
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