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STEREO SOUND SYSTEM
Ionosphere
AM reception
Mountains
Buildings Unobstructed
area
FM radio station
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Ionosphere
FM receptionObstructed area
Iron bridges
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 fadeat short distances from the station. Also, FM signals are easily affected by buildings, mountains, or other obstruc-tions. These can result in certain listen- ing conditions which might lead you to believe a problem exists with your ra-dio. The following conditions are normal and do not indicate radio trouble:
AM broadcasts can be received at greater distances than FM broadcasts. This is because AM radio waves are transmitted at low frequencies. Theselong, low frequency radio waves can follow the curvature of the earth rather than travelling straight out into the at-mosphere. In addition, they curve around obstructions so that they can provide better signal coverage.
B750A02A-AAT How Car Audio Works
AM and FM radio signals are broadcast from transmitter towers located around your city. They are intercepted by theradio 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 bestpossible quality reproduction. Howev- er, in some cases the signal coming to your vehicle may not be strong andclear. This can be due to factors such as the distance from the radio station,
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closeness of other strong radio stations or the presence of buildings, bridges orother large obstructions in the area.
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B750B02Y-DAT Using a mobile phone or a two- way radio When a mobile phone is used inside the vehicle, noise may be produced fromthe audio equipment. This does not mean that something is wrong with the audio equipment. In such a case, usethe mobile phone at a place as far as possible from the audio equipment.
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CAUTION:
When using a communication sys- tem such as a mobile phone or aradio inside the vehicle, a separate external antenna must be fitted. When a mobile phone or a radio set is usedwith an internal antenna alone, it may interfere with the vehicle's elec- trical system and adversely affectsafe operation of the vehicle.
WARNING:
Don't use a mobile phone when youare driving. Stop at a safe place to use a mobile phone.
o Station Swapping - As an 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 theclearest signal. If this occurs, select another station with a stronger sig- nal.
o Multi-Path Cancellation - Radio sig- nals being received from several di-rections can cause distortion or flut-tering. This can be caused by a direct and reflected signal from the same station, or by signals from twostations with close frequencies. If this occurs, select another station until the condition has passed.
o Fading - As your car moves away
from the radio station, the signal willweaken and sound will begin to fade. When this occurs, we suggest that you select another stronger station.
o Flutter/Static - Weak FM signals or large obstructions between the trans-mitter and your radio can disturb thesignal causing static or fluttering noises to occur. Reducing the treble level may lessen this effect until thedisturbance clears.
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