Toyota Celica 1993 AT200 series Repair Manual page 858

B E - 1 2 5
BODY ELECTRICAL SYSTEM - AUDIO SYSTEM
F a d i n g
i o n o s p h e f e
R E C E P T I O N P R O B L E M S
Besides the problem of static, there are also the prob-
lems called
"fading", "multipath" and "fade out". These
problems are caused not by €lsctrical noise but by the
nature of the radio waves themselves
Fade Out
Because FM radio waves are of higher fraquencies
than AM radio waves, thoy bounce off buildings, mou-
ntains. and other obstructions. For this reason, FM
signals often seam to gradually disappear or fade
away as the vehicle goes behind a building or othor
obstruction. This is called
"fade out".
M A I N T E N A N C E
Tage Player /Head Cleaning
(a) Raise tho cass€tte door with your finger.
Next using a pencil or like objoct, push in the guide'
(b) Using a cleaning pen or cotton applicator soaked in
cleaner, clean the head surface, punch rollers and
caostans.
F a d i n g
Besid€s electrical interference, AM broadcasts are
also susceptible to other typss of interference, espe-
cially at night. This is because AM radio waves
bounce off the ionosphere at night. These radio waves
thon interfere with the signals from the same trans-
mitt€r that reach the vehicle's antenna directly. This
typo of interference is called
"fading".
Multipath
One type of interference
caused bv
il",?:-r::iT,j
#$
radio waves off of obstructions is callad
"multipath"'
Multipath occurs when a signal from the broadcast
transmitt6r antenna bounces off buildings and moun-
tains and interferes with tho signal that is received
d irectly
F a d s O u t
M u l t i