Jeep 2008 Patriot Bedienungsanleitung PDF herunterladen (Seite 196)

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101

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.

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.

NOTE: The radio, steering wheel radio controls (if

equipped), and six-disc CD/DVD changer (if equipped)

will remain active for up to 10 minutes after the ignition

switch has been turned OFF. Opening a vehicle front

door will cancel this feature.

ELECTRONIC DIGITAL CLOCK

The clock and radio each use the display panel built into

the radio. A digital readout shows the frequency and/or

time in hours and minutes (depending on your radio

model), whenever the ignition switch is in the ON or

ACC position.

When the ignition switch is in the OFF position, or when

the radio frequency is being displayed, timekeeping is

accurately maintained.

On the AM/FM/CD (6-disc) radio, the time button

alternates the location of the time and frequency on the

display. On the AM/FM/CD (single-disc) radio, only one

of the two, time or frequency, is displayed.

194 UNDERSTANDING YOUR INSTRUMENT PANEL

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