UNDERSTANDING YOUR INSTRUMENT PANEL
253
you und erstand and save you concern abou t these “ap -
parent” malfunctions, you must und erstand a point or
two abou t the transm ission and recep tion of rad io sig-
nals.
FM Recep tion
Because FM transm ission is based on frequ ency varia-
tions, interference that consists of amplitude variations
can be filtered out, leaving the recep tion relatively clear,
which is the major featu re of FM rad io.
Two Types of Sign als
There are two basic typ es of rad io signals:
NOTE: The rad io, steering wheel rad io controls (if
equ ipped), and six-disc CD/ DVD changer (if equ ipped) 4
will rem ain active for up to 90 second s after the ignition
switch has been turned OFF, depend ing upon the EVIC,
Accessory Delay setting. Opening a vehicle front door
will cancel this featu re.
1.
AM or Amplitude Mod ulation, in which the transm it-
ted sou nd causes the amplitude, or height, of the rad io
waves to vary.
2.
FM or Frequ ency Mod ulation, in which the frequ ency
of the wave is varied to carry the sou nd .
Electrical Distu rbances
AM Recep tion
Radio waves may pick up electrical distu rbances during
transm ission. They mainly affect the wave amplitude,
and thu s rem ain a part of the AM recep tion. They
interfere very little with the frequ ency variations that
carry the FM signal.
AM sou nd is based on wave amplitude, so AM recep tion
can be disru pted by such things as lightning, power lines
and neon signs.
| Categories | Chrysler Manuals, Chrysler Town and Country Manuals |
|---|---|
| Model Year | 2008 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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