2004 Jeep Wrangler Owners Manual

UNDERSTANDING YOUR INSTRUMENT PANEL
121
Clock Setting Procedure
Turn  the  ignition   switch  to  the ON  or  ACC  position
and  press the time  button.  Using the  tip of a ballp oint pen
or similar  object,  press either  the  hou r (H) or minu te  (M)
buttons  on  the  rad io.
Two Types of Signals
There   are  two   basic  typ es  of   rad io  signals...  AM   or
Amplitude   Mod ulation,  in  which  the transm  itted  sou nd
causes  the  amplitude,    or  height,  of  the  rad io waves   to
vary...  and  FM  or Frequ ency  Mod ulation,   in which   the
frequ ency of  the wave  is  varied  to carry  the  sou nd .
1.
2.
minu tes.  The  time  setting   will  increase   each  time  you
press  a button.
Press  the H  button  to set  hou rs or the  M button  to  set
Electrical Disturbances
4
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.
RADIO GENERAL INFORMATION
Radio Broadcast Signals
Your  new  rad io  will  provid e  excellent  recep tion  und er
most operating   cond itions. Like any  system , how ever, car
rad ios have  perform  ance  limitations,  due   to mobile  op-
eration  and  natu ral phenom ena,  which might  lead  you to
believe  you r  sou nd  system   is malfunctioning.    To  help
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.
AM Reception
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.
FM Reception
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.
Product Specification
CategoriesJeep Manuals, Jeep Wrangler Manuals
Model Year2004
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- 299 pages
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CopyrightAttribution Non-commercial
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