Black plate (213,1)
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.
Interior Comfort
Audio System
6-19
Mazda5_8DF6-EI-13J_Edition7 Page213
Thursday, March 9 2017 8:35 PM
Form No.8DF6-EI-13J
