Radio Reception- Page 286

2015 Mazda Mazda6 Owners Manual

Model Year
2014 Dodge Charger SRT Owner Manual

Table of Contents

4. When Driving
8. Customer Information and Reporting Safety Defects
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Black plate (286,1)

Do not spill any liquid on the audio
system.

Do not insert any objects, other than CDs,
into the slot.

q

Radio Reception

AM characteristics

AM signals bend around such things as
buildings or mountains and bounce off the
ionosphere.
Therefore, they can reach longer distances
than FM signals.
Because of this, two stations may
sometimes be picked up on the same
frequency at the same time.

Station 2

Station 1

Ionosphere

FM characteristics

An FM broadcast range is usually about
40

50 km (25

30 miles) from the

source. Because of extra coding needed to
break the sound into two channels, stereo
FM has even less range than monaural
(non-stereo) FM.

FM Station

40—50km 
(25—30 miles)

Signals from an FM transmitter are similar
to beams of light because they do not
bend around corners, but they do reflect.
Unlike AM signals, FM signals cannot
travel beyond the horizon. Therefore, FM
stations cannot be received at the great
distances possible with AM reception.

AM wave

FM wave

FM wave

100—200 km (60—120 miles)

Ionosphere

Atmospheric conditions can also affect
FM reception. High humidity will cause
poor reception. However, cloudy days
may provide better reception than clear
days.

5-14

Interior Features

Audio System

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