Technics ST-8080

.DETECTION OF.MULTI-PATH. DISTORTION
@ Simple method, using stereo amplifier
Connect the terminal marked ‘‘VERT”’ (of this unit) with the
terminal marked ‘‘AUX”’ (of the amplifier).
@ Tune to the desired FM broadcast, and, referring to the
signal-strength meter©® and the FM_ center-tuning
meter®, make the tuning as perfect as possible.
@ Adjust the stereo amplifier, and increase the volume
level so that the sound signal can be heard.
© Turning the antenna around horizontally, and moving it
up and down, determine the position in which the sound
signal is best, and secure the antenna in that position.
This, then, will be the position at which multi-path dis-
tortion is minimized.
(“VERT”)
terminals
Integrated
amplifier
NE HHATNUULHTOHHEN
TL ao)
Auxiliary
terminals
M@ Method using an oscilloscope
Connect the terminal marked ‘‘HORIZ" (of this unit) with
the horizontal axis terminal (marked ''HORIZONTAL"’) of
the oscilloscope, and connect the terminal marked ‘‘VERT”’
(of this unit) with the vertical axis input terminal (marked
“VERTICAL” of the oscilloscope.
@ Tune to the desired FM broadcast, and, referring to the
signal-strength meter® and the FM _ center-tuning
meter®, make the tuning as perfect as possible.
@ Adjust the oscilloscope, and receive the multi-path
distortion.
© If there is multi-path distortion, a pattern such as shown
in figure B will be seen on the oscilloscope.
If such a pattern is seen, turn the antenna around
horizontally and move it up and down until a pattern such
as shown in figure A appears. When this position is
determined, secure the antenna in that position.
The pattern shown in figure A is that received at the
optimum antenna position, at which there is no multi-
path distortion.
Oscilloscope
No multi-path distortion Multi-path distortion
This is a signal output terminal for the discrete four-channel
FM broadcasts which are expected in the future. To enjoy
discrete four-channel FM broadcasts, one more pair of
speakers, a pre-main amplifier and a decoder for discrete
four-channel broadcasts are necessary, in addition to the
ordinary stereo system.
(VARIABLE) (FIXED)
4cH
SI” Mex out
HORIZ.
FM ;
MULTIPATH OUT
VERT
-
+ lf this unit becomes dirty, it can be cleaned by wiping it
with a soft, dry cloth. If it is extremely dirty, dip the soft
cloth into a soap-and-water solution, wring the cloth out
well and then wipe the unit clean. After cleaning, wipe
the unit dry once more with a dry cloth.
«Be careful not to allow alcohol, thinner, benzine, in-.
secticide and other similar chemicals to get on the
surface of this unit because they may damage its finish
by causing the finish to peel off or lose its luster.
+ Never use a wet cloth or a chemically-treated cloth for
cleaning.