Radio General Information; Radio Broadcast Signals; Two Types Of Signals; Electrical Disturbances - Dodge 2008 KA Nitro Owner's Manual

196 INSTRUMENT PANEL AND CONTROLS
Confirmation of Voice Commands — If Equipped
When ON is selected, all voice commands from the
UConnect™ system are confirmed. To make your selec-
tion, press and release the FUNCTION SELECT button
until "ON" or "OFF" appears.
Display Units of Measure in
The EVIC, odometer, and navigation system (if
equipped) can be changed between English and Metric
units of measure. To make your selection, press and
release the FUNCTION SELECT button until "US" or
"METRIC" appears.

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.