Pioneer SX-980 Інструкція з експлуатації Посібник з експлуатації - Сторінка 8
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ANTENNA
AND
GROUND
CONNECTIONS
FM ANTENNA CONNECTIONS
The
signals transmitted
by an FM
broadcasting
station
inevitably
become
weak
when
received
behind
mountains,
between
buildings
and inside
reinforced
concrete
structures.
In
weak-signal
areas, signals which are reflected off mountains
and
other
obstacles in their path may
be picked
up by the antenna, which causes a multipath effect.
This adversely affects the sound received. This is
why it is necessary to choose an antenna and an
installation location which are best suited to cope
with the ambient conditions and the strength of
the signals.
Special FM antennas
It is recommended
that
you
use
a special FM
antenna in order to obtain input signals which will
allow your receiver to display its capabilities to the
full.
@ When
installing
your
antenna,
refer
to
the
instructions
in 'FM
RECEPTION'
on page 13
and determine
in which direction the antenna
should point for the best reception, all the while
listening to a broadcast to check the reception.
Mount the antenna securely.
@ In
accordance
with
the
application
of the
antenna, use a 75-ohm
coaxial cable or a 300-
ohm
feeder
to
connect
the
antenna
to the
receiver.
75-ohm coaxial cable: As shown in Fig. 6, connect
the
cable
to the
752
UNBAL
terminal
of the
receiver. This cable is used in locations near roads
with
a great deal of traffic, and near overhead
high-tension
power
lines which generate a lot of
noise.
It is also used
when
the antenna
and the
receiver are far apart.
300-ohm
feeder: As shown in Fig.7, connect the
feeder to the 83002
BAL
terminals.
Use it when
there is little external noise and when the antenna
and the receiver are not far apart.
NOTE:
Consult
your
nearest
PIONEER
dealer concerning
the
special FM antenna and the 75-ohm coaxial cable.
T-type antenna
When
the broadcasting station is located nearby
and
when
the FM
signals are strong in wooden
frame
buildings
and
others,
you
can
use
the
accessory T-type antenna (Fig.7).
As shown in Fig. 7 connect the end of the T-type
antenna to the 300-ohm terminal. Spread the two
arms of the antenna horizontally and while listen-
ing to an FM
station, rotate the antenna through
180 degrees and position it for the best reception.
Tape the antenna to a wall or ceiling.
FM outdoor antenna
$X-980
Antenna
terminals
FM outdoor antenna
T-type antenna
300-ohm
feeder