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Mountains Buildings Obstructed area
Iron bridges
Unobstructed area
FM radio station
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AM receptionB750A02A-AAT STEREO SOUND SYSTEM How Car Audio Works
FM reception
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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 engineering of your audio system ensures high quality reproduction. How- ever, in some cases the signal coming to your vehicle is not 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 presence of buildings, bridges or other large obstructions in the area. AM broadcasts can be received at greater dis- tances than FM broadcasts. This is because AM radio waves are transmitted at low frequency. 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 frequency 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 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 indi- cate radio trouble:
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SSAR014AB750B02Y-AAT 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 equip- ment. This does not mean that something is wrong with the audio equipment. In such a case, use the cellular phone at a place as far as possible from the audio equipment. CAUTION: When using a communication system such a cellular phone or a radio set inside the vehi- cle, a separate external antenna must be fitted. When a cellular phone or a radio set is used by using an internal antenna alone, it may interfere with the vehicle's electrical sys- tem and adversely affect safe operation of the vehicle. WARNING: Don't use a cellular phone when you are driving, you must stop at a safe place to use a cellular phone.SSAR013A
o Station Swapping - As a FM signal weakens,another more powerful signal near the same frequency may begin to play. This is because your radio is designed to lock onto the clearest signal. If this occurs, select another station with a stronger signal.
o Multi-Path Cancellation - Radio signals being received from several directions can cause distortion or fluttering. This can be caused by a direct and reflected signal from the same station, or by signals from two stations with close frequencies. If this occurs, select an- other station until the condition has passed.
o Fading - As your car moves away from the
radio station, the signal will weaken and soundwill begin to fade. When this occurs, we suggest that you select another stronger sta- tion.
o Flutter/Static - Weak FM signals or large
obstructions between the transmitter and your radio can disturb the signal causing static or fluttering noises to occur. Reducing the treble level may lessen this effect until the distur- bance clears.
