RADIO GENERAL INFORMATION
Radio Broadcast Signals
Your new radio will provide excellent reception under
most operating conditions. Like any system, however, car
radios have performance limitations, due to mobile op-
eration and natural phenomena, which might lead you to
believe your sound system is malfunctioning. To help
you understand and save you concern about these “ap-
parent” malfunctions, you must understand a point or
two about the transmission and reception of radio sig-
nals.
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.
NOTE:The radio, steering wheel radio controls, and 6
disc CD/DVD changer (if equipped) will remain active
for up to 60 minutes after the ignition switch is turned
off. Opening either front door will cancel this feature. The
time is programmable. For details, refer to “Delay Power
Off to Accessories Until Exit,” under “Personal Settings
(Customer Programmable Features),” under “Electronic
Vehicle Information Center (EVIC)” in Section 4 of this
manual.
158 UNDERSTANDING YOUR INSTRUMENT PANEL
screen to provide maps, turn identification, selection
menus and instructions for selecting a variety of destina-
tions and routes, AM/FM stereo radio and six-disc CD
changer with MP3 capability.
Mapping information for navigation is supplied on a
DVD that is loaded into the unit. One map DVD covers
all of North America. Refer to your “Navigation User’s
Manual” for detailed operating instructions.
Operating Instructions — Satellite Radio (If
Equipped)
Refer to your “Navigation User’s Manual” for detailed
operating instructions.
REC Setting the Clock
GPS Clock
The GPS receiver used in this system is synchronized to
the time data being transmitted by the GPS satellites. The
satellites’ clock is Greenwich Mean Time (GMT). This is
the worldwide standard for time. This makes the sys-
tem’s clock very accurate once the appropriate time zone
and daylight savings information is set.1. At theMain Menuscreen, highlight “Clock Setup”
and press ENTERORpress and hold for 3 seconds the
TIME button on the unit’s faceplate. TheClock Setup
screen appears.
2. To show the GPS clock, select “Displayed Clock: GPS
Clock” and press ENTER.
3. To adjust the time zone, Select “Time Zone” and press
ENTER. Select the appropriate time zone and press
ENTER.
UNDERSTANDING YOUR INSTRUMENT PANEL 171
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