Technics ST-8080

© Connection of the antenna to this unit
(A) If 300-ohm connection wire is used.
Turn the screws of the antenna terminals 2 or 3
times counterclockwise to loosen them, connect
the wire to the terminals, and then tighten the
screws once again.
Note that the antenna connection wire between this
unit and the antenna should be no longer than
necessary, in order to reduce the possibility of
reception of unwanted electric waves and noise.
Terminal screws for connection
of 300-ohm antenna
L SZ) 300-ohm antenna wire
(B) If 75-ohm coaxial cable is used.
@) Strip off about 20 mm of the cover of the coaxial
cable.
©) Cut off about 10 mm of the steel wire, and then
fold back the remaining steel wire.
© Then remove all except about 7 mm of the cover
of the core wire.
@ Loosen the screw of the ground terminal, connect
the coaxial cable under the holder, and tighten
the screw once more. Be sure that the steel wire
part of the coaxial cable contacts the holder.
© Finally, connect the core of the coaxial cable to
the FM antenna terminal (above the ground
terminal). The connections are then complete.
@ ® © @
Ground
Holder terminal
>
T About
About 7mm
20 mm
75-ohm FM antenna
; terminal
coaxial cable
Special FM antenna
(optional)
Terminal screws for
connection of 75-ohm
coaxial cable
Note:
ff
shielding
wire
and
core
are
short-circuited,
similar
condition
to
that
where
the
antenna
is
not
connected
is
established.
MINSTALLATION OF AN ANTENNA
EXCLUSIVELY FOR FM BROADCASTS
The location of the exclusive antenna for FM broadcasts
is a very important factor in the determination of tone
quality, and even the best antenna will not function satis-
factorily if it is installed in a poor location.
Carefully consider, therefore, the following information
before deciding upon the location where the antenna will
be installed.
(1) if such obstacles as mountains or large buildings are
nearby, broadcast signals which are reflected from
these obstacles (reflected waves) will cause inter-
ference in the broadcast signals which are received
directly from the broadcast station (direct waves),
resulting in multi-path distortion, which will cause
distortion in the sound and poor left-right separation
of the sound.
Good installation
prevents
multi-path
Obstacle
Reflected
waves
distortion
don't
enter
the
x range of antenna's
oe” a sey directional —
oo oy characteristic
ra "s/o,
o @ "ey
Direct wave
Broadcast oneeeeeeens>
station ates
Antenna's directional
characteristic
(2) In order to prevent automobile ignition noise from
causing interference, the antenna should be installed
as far from the road as possible. as shown in figure.
In addition, it should be installed as far as possible
from neon signs.
eum Install FM antenna away from
sources of electrical interference.
=
ied
(3) It should be installed at least 2 meters or more away
from a metal roof, a concrete building, or from any
other antennas, such as a television antenna.
(4) FM antennas have a very high ‘‘directional’’ charac-
teristic. In other words, they are much more sensitive
to FM signals from one certain direction, more than
from any other direction. The antenna should be install-
ed, therefore, so as to face in that direction of best
reception.
Although it is, in general, true that the higher the
antenna is installed the better, depending upon the
location, it may be that a lesser height would be even
more advantageous. However, unless there are some
special conditions, a height of 4 meters above the
ground is recommended.
(5
===> if antenna is too
@ low, FM broadcast
Install FM m= reception will be
antenna = weak.
as high possible.
(6) Be sure to install the antenna away from any power
lines, because it would be very dangerous if the
antenna were to fall and contact the power lines.