19 0 n
Radio reception Safety belt tensioner
Th e A M fre q u e n c y b a n d s (m e diu m -
w a v e , lo n g - w a v e a n d s hort- w a v e) m a k e
it p o s si ble to re c eiv e statio ns fro m a
gre a t dista n c e , b e c a us e th e bro a d c ast
sig n als tra v el n ot only alo ng th e gro u n d
as surf a c e w av e s, b ut also a s at m o-
s p h eric w av e s th at are r e fle cte d fro m
th e io n o s p h ere .
Fre q u e n c y m o d ulatio n (F M) offe rs
su b sta ntially b ett er s o u n d q u ality th a n
th e oth er fre q u e n cie s. H o w e v e r,
b e c a u s e F M tra ns mis sio ns rely o n lin e -
of - sig ht bro a d c ast w a v e s, th e ir eff e c -
tiv e r e c e ptio n ra n g e is limite d .
36 0 d e 0 8 4
Th e limitatio n s inh ere nt t o ra d io re c e p -
tio n in a m o vin g v e hicl e h av e b e e n
minim iz e d b y a nu m b er of inn o v ativ e
sy ste m d e sig ns:
Th e " R a dio D ata S y ste m " (R D S) m a k e s
sure th at, f or b ro a d c ast st a tio ns
s e n din g o n s e v eral fre q u e n cie s, th e
ra d io a uto m atic ally tun e s to th e
fre q u e n c y with th e b e st re c e ptio n
q u ality.
Th e A nt e n n a Div ersity s yst e m e m plo ys
s e v eral F M a nte nn a s inte grat e d w ithin
th e re ar win d o w to pro vid e thre e s e p a-
rat e so urc e s for re c eivin g bro a d c ast
w a v e s. A n inte gral pro c e ss or a uto m ati-
c ally s ele c ts th e a nt e n n a with th e b e st
F M r e c e ptio n q u ality at a ny giv e n tim e .
Th e s e l e ctio n of th e a nte n n a ta k e s
pla c e w ithin millis e c o n d s, a n d is
th eref ore n ot n otic e d b y th e ra d io
list e n e r.
Th e saf ety b elt te n sio n e r m a k e s s ur e
th at th e b e lt tig ht e n s d urin g a h e a d - o n
c ollisio n to e nsure th at o c c u p a nts
re m ain firmly p o sitio n e d in th eir s e ats.
A g a s - pre ssure s yst e m re tra cts th e
b u c kl e a ss e m bly to te n sio n th e
sh o uld e r a n d la p b elts w ithin fra ctio ns
of a s e c o n d. This re d u c e s th e te n d e n c y
to slid e u n d er th e la p b elt.
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