KIA Sorento (2009) - Manual (Page 126)

3 117
Knowing your vehicle
Troubleshooting Poor Radio
Reception
Problem:
Fading Signals / Interference /
Increased interference/ Static
FM Broadcasts - The further you move
away from the radio station's transmitting
source (normally within a city or town),
the weaker the signal will be. You might
experience abrupt breaks in transmis-
sion, garbled sound and also static even
though your radio remains tuned to the
same frequency.
AM Broadcasts - Even though AM radio
signals travel further and stronger than
FM radio signals, weather or terrain con-
ditions might adversely affect your radio's
ability to receive the signals.
Solution:
Use your audio system's Scan function to
automatically search for and select
another radio station with good signal
strength.
Problem:
High-pitched static, distortion or a
'fluttering' sound (Multi-Path
Cancellation)
Radio stations transmitting on frequen-
cies that are very close to each other
may cause distortion or 'fluttering'. This
effect is known as Multi-Path
Cancellation. This normally occurs when
your tuner is receiving a station's trans-
mission as both direct and 'reflected'
radio signals or when your tuner receives
signals from more than 1 radio station
transmitting on frequencies that are very
close to each other.
Solution:
If the problem is caused by a temporary
deterioration in the signal strength of one
station's transmission, reduce the levels
of your audio system's Treble and Middle
settings to suppress the sound. If the
problem is caused by interference from
another station, select another radio sta-
tion with good and clear signal strength.
Problem:
Interference from another FM radio
broadcast ('station-swapping')
FM radio stations transmit on frequen-
cies that are very close to each other on
the FM band. When you travel further
and further away from a transmitting
source, the signal strength of that trans-
mission decreases. Your radio's ability to
'lock' on to that specific frequency is
affected. This is because your radio is
designed to lock on to the strongest sig-
nal it can detect. Therefore, another radio
station broadcasting on a frequency very
close to your original station could 'inter-
fere' with your reception and you might
start to hear the broadcast of the second
station. You will normally experience this
when you are moving away from a weak
signal and towards a stronger one.