Mazda MAZDA3 4-Door Bedienungshandbuch PDF herunterladen (Seite 224)

5

–

18

Interior Features

Audio System

Do not spill any liquid on the audio

system.

Do not insert any objects, other than CDs,

into the slot.

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

4 0  5 0 km

(2 5  3 0 m iles)

Signals from an FM transmitter are similar

to beams of light because they do not

bend around corners, but they do reﬂ ect.

Unlike AM signals, FM signals cannot

travel beyond the horizon. Therefore, FM

stations cannot be received at the great

distances possible with AM reception.

A M wav e

FM wav e

FM wav e

10 0  2 0 0 km (6 0  12 0 m iles)

Ionosphere

Atmospheric conditions can also affect

FM reception. High humidity will cause

poor reception. However, cloudy days may

provide better reception than clear days.

Mazda3_8DC9-EA-14A_Edition1.indb 18 2013/10/18 14:56:09

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