Two Types Of Signals; Electrical Disturbances; Am Reception; Fm Reception - Dodge 2004 JR41 Stratus Sedan Owner's Manual

Two Types of Signals

There are two basic types of radio signals... AM or
Amplitude Modulation, in which the transmitted sound
causes the amplitude, or height, of the radio waves to
vary... and FM or Frequency Modulation, in which the
frequency of the wave is varied to carry the sound.

Electrical Disturbances

Radio waves may pick up electrical disturbances during
transmission. They mainly affect the wave amplitude,
and thus remain a part of the AM reception. They
interfere very little with the frequency variations that
carry the FM signal.

AM Reception

AM sound is based on wave amplitude, so AM reception
can be disrupted by such things as lightning, power lines
and neon signs.

FM Reception

Because FM transmission is based on frequency varia-
tions, interference that consists of amplitude variations
can be filtered out, leaving the reception relatively clear,
which is the major feature of FM radio.
UNDERSTANDING YOUR INSTRUMENT PANEL 95
SALES CODE RAZ—AM/ FM STEREO RADIO
WITH CASSETTE TAPE PLAYER, CD PLAYER
AND CD CHANGER CONTROLS — IF EQUIPPED
Operating Instructions — Radio
NOTE: Power to operate the radio is controlled by the
ignition switch. It must be in the ON or ACC position to
operate the radio.

Power Switch, Volume Control

Press the ON/VOL control to turn the radio on. Turn the
volume control clockwise to increase the volume. The
volume will be displayed and continuously updated
while the button is pressed.
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