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EFFECTIVE
OPERATION
TURNOVER SWITCHES
As shown
in Fig. 14, the receiver adopts a tone
control
system
that
combines
the
BASS
and
TREBLE
controls with two TURNOVER
switches
which are used to select the frequency. Select the
frequency with the TURNOVER
switches and then
enhance
or attenuate the sound in the lower (or
higher) frequencies with the BASS
(or TREBLE)
controls.
oo
—
TREBLE
TURNOVER
Base
fe
TURNOVER
4Q0Hz
Reig
TONE
eta
2.5kHz
2O0Hz
SkHz
2
2
2
2
Ft
3
OFF
3
3
a
a
ON
a
a
be
5
S
5
eS
=
ar
Fig. 14
For instance, if the BASS
TURNOVER
switch is
set to 400Hz (see Fig. 15), the bass covers a wide
frequency
spectrum
and
can
be
enhanced
(or
reduced)
with
large gain per step of the BASS
control.
For this reason,
the reproduced
sound
sometimes
seems
unnatural
depending
on
the
program
source,
but
this
can
be remedied
by
setting the switch to 200Hz.
H
ba,
'
ibe
pee
' | BASS
TURNOVER
TREBLE
TURNOVE
a
25kHzZ
LEVEL
(dB)
10
100
200
400
1"
2.5m
Sk
10%
100%
FREQUENCY
(Hz)
A
Fig. 15
VOLUME CONTROL AND MUTING SWITCH
The
VOLUME
control scale is directly calibrated
in dB. By adjusting it in combination
with the
MUTING
switch, it is possible to adjust the attenu-
ation
more
finely across a very wide range. The
attenuation
(volume)
is equal to the VOLUME
control indication plus 20dB.
@® One
convenient
application
of the
MUTING
Switch
is for temporarily reducing the volume
while
changing
records,
tapes
or
for
other
applications.
This eliminates the need for con-
tinual re-adjustment of the VOLUME control.
(Er
ee
ee
§ >) ONC CTS
e With late-night listening or at other times when
low
volumes
are
used,
precise
adjustment
becomes difficult when the VOLUME control is
near the ~
position. In these cases, it is conve-
nient to first set the MUTING
switch to -20dB
and then adjust the VOLUME
control.
VOLUME
MUTING
~~ 200B
RECEPTION OF FM DOLBY BROADCASTS
If you live in an area' where you can receive FM
Dolby broadcasts, you can listen in if you connect
an optional Dolby adaptor to the TAPE 2 jacks.
1. Connect the Dolby adaptor to the TAPE 2 jacks
(REC, PLAY), as shown in Fig..17.
. Depress the FM 25uS button.
. Set the TAPE MONITOR 2 switch to ON.
. Operate the Dolby adaptor.
. Depress the FM function button and tune in to
the Dolby broadcast with the tuning knob. For
reception, refer to ""FM RECEPTION" since the
procedure is the same.
Fig. 16
oo
® bd
NOTES:
e
For
detailed
instructions
on
connections
and
the
handling of the Dolby adaptor,
refer to its operating
instructions.
e
When you are not listening to an FM Dolby broadcast,
return the FM 25uS button and the TAPE MONITOR
2 switch to their original positions.
SX-980
Ss
----- Se
«A
_———— nO.
Jpaovo Ortee Os
Dolby
adaptor
or
yor"
7
Fig. 17
15
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