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How car audio works
AM (MW, LW) and FM radio signals are
broadcast from transmitter towers locat-
ed 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 engineering of
your audio system ensures the best pos-
sible quality reproduction. However, in
some cases the signal coming to your
vehicle may not be strong and clear. This
can be due to factors such as the dis-
tance from the radio station, closeness of
other strong radio stations or the pres-
ence of buildings, bridges or other large
obstructions in the area.AM (MW, LW) broadcasts can be
received at greater distances than FM
broadcasts. This is because AM(MW,
LW) radio waves are transmitted at low
frequencies. These long, low frequency
radio waves can follow the curvature of
the earth rather than travelling straight
out into the atmosphere. In addition, they
curve around obstructions so that they
can provide better signal coverage.
FM broadcasts are transmitted at high
frequencies and do not bend to follow the
earth's surface. Because of this, FM
broadcasts generally begin to fade at
short distances from the station. Also,
FM signals are easily affected by build-
ings, mountains, or other obstructions.
These can result in certain listening con-
ditions which might lead you to believe a
problem exists with your radio. The fol-
lowing conditions are normal and do not
indicate radio trouble:
4
JBM001
FM receptionJBM002
AM(MW, LW) receptionJBM003
FM radio station
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Features of your vehicle
Fading - As your car moves away fromthe radio station, the signal will weaken
and sound will begin to fade. When this
occurs, we suggest that you selectanother stronger station.
Flutter/Static - Weak FM signals or large obstructions between the trans-
mitter and your radio can disturb the
signal causing static or fluttering nois-
es to occur. Reducing the treble level
may lessen this effect until the distur-
bance clears. Station Swapping - As a FM signal
weakens, another more powerful sig-
nal near the same frequency may
begin to play. This is because your
radio is designed to lock onto the clear-
est signal. If this occurs, select anotherstation with a stronger signal.
Multi-Path Cancellation - Radio signals being received from several directions
can cause distortion or fluttering. This
can be caused by a direct and reflect-
ed signal from the same station, or by
signals from two stations with close
frequencies. If this occurs, selectanother station until the condition haspassed.
Using a cellular phone or a two-way
radio
When a cellular phone is used inside the
vehicle, noise may be produced from the
audio equipment. This does not meanthat something is wrong with the audio
equipment. In such a case, use the cellu-
lar phone at a place as far as possiblefrom the audio equipment.
4
JBM005JBM004
CAUTION
When using a communication sys-tem such a cellular phone or a radio set inside the vehicle, a separateexternal antenna must be fitted.
When a cellular phone or a radio setis used with an internal antenna alone, it may interfere with the vehi-cle's electrical system and adversely
affect safe operation of the vehicle.
WARNING
Don't use a cellular phone when you
are driving. You should stop at a safe
place to use a cellular phone.
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Features of your vehicle
2044FCC Warning
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which c
an be
determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of th e
following measures:
Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operat e
this equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interf er-
ence that may cause undesired operation.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.
This equipment should be installed and operated with minimum 20 cm between the radiator and your body. This transmitter
must not be collocated or operating in conjunction with any other antenna or transmitter unless authorized to do so by the FCC. DECLARATION OF CONFORMITY