Kia Optima: How vehicle audio works - Audio system - Features of your vehicle - Kia Optima TF 2011-2018 Owners ManualKia Optima: How vehicle audio works

AM and FM radio signals are broadcast from transmitter towers located around

AM and FM radio signals are broadcast from transmitter towers located around your city. They are intercepted by the radio antenna on your vehicle. This signal is then received by the radio and sent to your vehicle speakers.

When a strong radio signal has reached your vehicle, the precise engineering of your audio system ensures the best possible 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 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 distances than FM broadcasts. This is

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 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

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 buildings, mountains, 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:

 Fading - As your vehicle moves away from the radio station, the signal will

Fading - As your vehicle moves away from the radio station, the signal will weaken and sound will begin to fade. When this occurs, we suggest that you select another stronger station.

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 disturbance clears.

 Station Swapping - As a FM signal weakens, another more powerful signal near

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.

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 another station until the condition has passed.

Aux, USB and iPod* port
If your vehicle has an aux and/or USB(universal serial bus) port or iPod port, you can use an aux port to connect audio devices and an USB port to plug in an USB and also an iPod port to plug ...

Satellite radio reception
Satellite radio reception You may experience difficulties in receiving SIRIUS satellite radio signals in the following situations. If you are driving in a tunnel or a covered parking area. ...

See also:

Heating and Cooling System Off
Press the "OFF" button to stop the operation of the heating and cooling system. ...

Inspection
1. Check the rear stabilizer bar for deformation. 2. Check the rear stabilizer link ball joint for damage. ...

Checking Brake/Clutch Fluid Level
Check the fluid level in the reservoir periodically. The fluid level should be between MAX and MIN indicators on the side of the reservoir. Before removing the reservoir cap and adding brake flui ...

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