Mazda 323F, Owner'S Manual

Page: 108 / 196

Your Ma7.da
Radio Reception
•
AM (Amplitude Modulation)
Characteristics
.... Station mixing
AM signals bend around weh 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
sallle time.
4-46
•
I'M (Frequency Modulation)
Characteristics
An FM broadcast range is u�ually about
40-50 km (25-30 miles) from the
source. Ilec;mse of extra coding needed to
break the sound into two channels, stereo
FM has even less range than monaural
(nonstereo)
FM.
Signals from an
FM
transmitter are
10 beams oflighl because they do
;!(ound corners. but they do reflect.
AM signals. FM signals cannot
yond the horizon. Therefore. FM
c:mnol be received
aI
the great
possible with A M reception.
A tmosphcric mod ,;H,,",
,", ,,
,
,,
..
reception. High humidity will cause
reception. However. cloudy days
vide beUer reception than clear dayS