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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.
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.
96 UNDERSTANDING YOUR INSTRUMENT PANEL