UNDERSTANDING YOUR INSTRUMENT PANEL
221
Two Types of Signals
FM Reception
There are two basic types of radio signals: AM or
AmplitudeModulation,inwhichthetransmittedsound
causes the amplitude, or height, of the radio waves to
vary; and FM or Frequency Modulation, in which the
frequencyofthewaveisvariedtocarrythesound.
Because FM transmission is based on frequency varia-
tions, interference that consists of amplitude variations
canbefilteredout,leavingthereceptionrelativelyclear,
whichisthemajorfeatureofFMradio.
NOTE:
The radio, steering wheel radio controls (if
Electrical Disturbances
equipped),andsix-discCD/DVDchanger(ifequipped) 4
willremainactiveforupto10minutesaftertheignition
switch has been turned OFF. Opening a vehicle front
doorwillcancelthisfeature.
Radiowavesmaypickupelectricaldisturbancesduring
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
carrytheFMsignal.
AM Reception
AMsoundisbasedonwaveamplitude,soAMreception
canbedisruptedbysuchthingsaslightning,powerlines
andneonsigns.
| Categories | Jeep Manuals, Jeep Wrangler Manuals |
|---|---|
| Model Year | 2008 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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