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Black plate (210,1)
Model "S51-D" EDITED: 2008/ 3/ 26
are completely normal in a given reception
area, and do not indicate any malfunction
in your INFINITI radio system.
Reception conditions will constantly
change because of vehicle movement.
Buildings, terrain, s ignal distance and
interference from other vehicles can work
against ideal reception. Described below
are some of the factors that can affect your
radio reception.
Some cellular phones or other devices may
cause interference or a buzzing noise to
emit from the audio system speaker s.
Storing the device in a different location
may reduce or eliminate the noise.
SAA0306
FM radio reception:
Range: FM range is normally limited to 25
to 30 miles (40 to 48 km), with monaural
(single channel) FM having slightly more
range than stereo FM. External influences
may sometimes interfere with FM station
reception even if the FM station is within
25 miles (40 km). The strength of the FM
signal is directly related to the distance
between the transmitter and receiver. FM
signals follow a line-of-sight path, exhibit-
ing many of the same characteristics as
light. For example they will reflect off
objects.
Fade and drift: As your vehicle moves away
from a station transmitter, the signals will
tend to fade and/or drift.
Static and flutter: During signal interfer-
ence from buildings, large hills or due to
antenna position, usually in conjunction
with increased distance from the station
transmitter, static or flutter can be heard.
This can be reduced by lowering the treble
setting to reduce the treble response.
Multipath reception: Because of the reflec-
tive characteristics of FM signals, direct
and reflected signals reach the receiver at
the same time. The signals may cancel
each other, resulting in momentary flutter
or loss of sound.
AM radio reception:
AM signals, because of their low frequency,
can bend around objects and skip along
the ground. In addition, the signals can be
bounced off the ionosphere and bent back
to earth. Because of these characteristics.
AM signals are also subject to interference
as they travel from transmitter to receiver.
Fading: Occurs while the vehicle is passing
through freeway underpasses or in areas
with many tall buildings. It can also occur
for several seconds during ionospheric
turbulence even in areas where no obsta-
cles exist.
4-44 Monitor, climate, audio, phone and voice recognition systems