Understanding Your Instrument Panel 185; Radio General Information; Radio Broadcast Signals; Two Types Of Signals - Dodge 2008 Caliber Owner's Manual

Settings (Customer-Programmable Features)" menu,
press and release (less than one second) the EVIC button
several times until "Calibrate Compass (Yes)" is dis-
played. Using a long button press (more than one sec-
ond), pressing the EVIC button will place the Compass in
calibration mode. The CAL indicator will come on con-
tinuously in the EVIC display to indicate that the com-
pass is now in the calibration mode and that the vehicle
can now be driven to calibrate. A short EVIC button press
from the Calibrate Compass (Yes) screen will exit the
EVIC Customer-Programmable Features, and return it to
its normal operating mode. To complete the compass
calibration, drive the vehicle in one or more complete 360
degree circles under 5 mph (8 km/h) in an area free from
power lines and large metallic objects, until the "CAL"
indicator turns off. The compass will now function
normally.

UNDERSTANDING YOUR INSTRUMENT PANEL 185

RADIO GENERAL INFORMATION

Radio Broadcast Signals

The radio will provide excellent reception under most
operating conditions. Like any system, however, automo-
tive radios have performance limitations, due to mobile
operation 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.
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