Jeep 2004 Grand Cherokee, Owner'S Manual

Page: 136 / 344

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 RBK—AM/ FM STEREO RADIO
WITH CD PLAYER AND CD CHANGER CONTROLS
Radio Operation
Power/Volume Control
Press the ON/VOL control to turn the radio on. Turn the
volume control clockwise to increase the volume.
136 UNDERSTANDING YOUR INSTRUMENT PANEL