Technics ST-9038 Operating Instructions

5)
Locat¡on
of anlenna
lnstall the antenna:
1.
Where
it will
receive FM broadcast
signals
directly;
not in the
"shadow"
of a building.
Correct location avoids
mult¡path
reception.
Direct
Obstruction
Reflected waves
Transmitt¡ng station
waves
Directional
characteristic
Reflected
waves
don't
enter
directional
range.
Note:
Multipath recept¡on
is the distortion which
results
from the reception of
two
types
of
s¡gnals:
those re-
flected from nearby
buildings, mounta¡ns, etc., and
those received directly from the broadcasting
stat¡on.
2.
Away
from
busy
roads,
and
away from
neon s¡gns.
ln order to receive FM broadcasts in
the best
possible
condition,
it
is necessary
to use a special
antenna
exclus¡vely for FM recept¡on, installing ¡t
facing
¡n the
direction of
least
mult¡path
distortion.
Multipath distortion can be
.detected
by using
the
multi-
path
output terminals
("MULTIPATH
OUT") as described
below.
I Simpte method,
us¡ng a stereo
ampl¡faer:
Make connection
between the
"VERT"
terminal
of th¡s
unit
and one of the
"AUX"
terminals
of the stereo
amplifier.
1. Tune to
the FM broadcast.
2. Operate
the stereo amplifier
so as
to
get
an aud¡o
signal.
3.
Move the antenna
about, and
secure
¡t
where
the audio
signal
is
minimum.
This is
the
pos¡tion
of least multi-path
distortion.
crc
@Mrc
Connect
to either
the left
("L")
or
right
("R")
terminal.
VERT
terminal
Stereo
pin-
AUX
type
cord
terminal
Stereo amplifier
I
Method by
using an
osc¡lloscope
Make connections between
the
{erminal
marked
"HORIZ"
of this
unit and the same terminàl
of
the
oscilloscope,
and
between the terminal marked
"VERT'I
of
this
unit and
the
same term¡nal
of
the
osc¡lloscope.
1. Tune to the desired FM
broadcast.
2.
Obtain the multi-path wavelorm
on the
oscifloscope
scfeen.
3.
lf
there
is multi-path
distortion, a waveform
such as
shown ín "8"
in the figure below will
appear.
lf this
type
of waveform appears, move
the antenna about,
and secure
it in the
pos¡t¡on
where a waveform
such as
shown
by "A"
in the figure
below appears.
The
waveform
shown by "4"
in the figure below indicates
the
antenna
position
where multipath
distortion
is
minimized.
^
Away
f rom noise sources!
3.
At least am
(13
ft.) above the
ground
(except
in
moun-
tainous regions,
etc.).
rrrt
,
As high as
possíble
Signals
not
received if too
low.
4.
At
least
3m
(10
ft.) away from a metal
roof or other an-
tennas.
Metal roof
At least 3m
(10
ft.) away
I
il
Danger
close to
power
lines
^t
ry
o
o
o
ffi
No mult¡path
distort¡on
Multipath distort¡on
exists
oscilloscope
n
il
m¡¡rfi¡lt
m
-8-
5.
To avoid danger, away from electric
power
lines.

Technics ST-9038 Specifications

General

Brand	Technics
Model	ST-9038
Category	Tuner
Language	English