Hyundai 2008 Santa Fe - Manual (Page 156)

1 FEATURES OF YOUR HYUNDAI
144
STEREO SOUND SYSTEM
B750A02A-AAT
How Car Audio Works
AM broadcasts can be received at greater
distances than FM broadcasts. This is
because AM radio waves are transmitted
at low frequencies. These long, low fre-
quency radio waves can follow the curva-
ture of the earth rather than travelling
straight out into the atmosphere. In addi-
tion, they curve around obstructions so
that they can provide better signal cover-
age.
AM and FM radio signals are broadcast
from transmitter towers located around
your city. They are intercepted by the radio
antenna on your car. This signal is then
received by the radio and sent to your car
speakers. When a strong radio signal has
reached your vehicle, the precise engi-
neering of your audio system ensures the
best possible quality reproduction. How-
ever, in some cases the signal coming to
your vehicle may not be strong and clear.
This can be due to factors such as the
distance from the radio station, closeness
of other strong radio stations or the pres-
ence of buildings, bridges or other large
obstructions in the area.
FM broadcasts are transmitted at high fre-
quencies and do not bend to follow the
earth's surface. Because of this, FM broad-
casts generally begin to fade at short dis-
tances from the station. Also, FM signals
are easily affected by buildings, moun-
tains, or other obstructions. These can
result in certain listening conditions which
might lead you to believe a problem exists
with your radio. The following conditions
are normal and do not indicate radio trouble:
Ionosphere
B750A02L
AM reception
Mountains
Buildings
Unobstructed
area
FM radio station
B750A03L
Ionosphere
FM reception
B750A01L
Obstructed area
Iron bridges