1
86nRa d io re c e p tio n
BMW Ac tive S e a t*
Alth ough n um e ro us fa c to rs c om b ine to
im p os e in he re nt lim ita tio ns o n th e re -
c e p tio n q ua lity a va ila b le fro m m ob ile ra -
d ios , s p e c ia lly d e s igne d s ys te m s c a n
b e e m p loye d to m inim ize th e ir e ffe c ts :
With ra d io s ta tio ns w hic h b ro a d c a s t
ove r m ultip le fre q ue nc ie s , th e "R a d io
Da ta S ys te m " (R DS ) e ns ure s th a t th e
fre q ue nc y w ith th e b e s t re c e p tio n q ua l-
ity w ill a uto m a tic a lly b e s e le c te d .
The Dive rs ity An te nna s ys te m e m p loys
s e ve ra l FM a nte nna s in te gra te d w ith in
th e re a r w ind ow to p ro vid e th re e s e p a -
ra te s ourc e s fo r re c e iving b ro a d c a s t
wa ve s . An in te gra l p ro c e s s or a uto m a ti-
c a lly s e le c ts th e a nte nna w ith th e b e s t
FM re c e p tio n q ua lity a t a ny g ive n tim e .
Be c a us e th e o ngoing a nte nna s e le c tio n
p ro c e s s is c om p le te d w ith in m illis e c -
ond s , it re m a ins in a ud ib le to th e ra d io
lis te ne r.
AM p ro vid e s s ub s ta ntia lly lo nge r re c e p -
tio n ra nge s th a n FM. AM b ro a d c a s t s ig-
na ls , p ro p a ga te d a t g ro und le ve l in th e
form o f s urfa c e w a ve s , a re a ls o re -
fle c te d fro m th e io nos p he re a s a tm o-
s p he ric w a ve s .
Fre q ue nc y- m od ula tio n (FM) p ro vid e s
s ub s ta ntia lly b e tte r s ound q ua lity th a n
AM. Ho we ve r, b e c a us e FM tra ns m is -
s ions re ly o n line -of-s ight b ro a d c a s t
wa ve s , th e ir e ffe c tive re c e p tio n ra nge is
lim ite d .
The Ac tive S e a t is a n a d va nc e d d e ve l-
op m e nt in B MW s e a ts . Th e s e s e a ts a re
e ngine e re d w ith o rth op e d ic c ons id e r-
a tio ns s o th a t yo u w ill b e le s s fa tig ue d
d uring lo nge r trip s a nd s ittin g fo r lo ng
p e rio d s w ith out m oving. Th e s e a t is n o
longe r a p a s s ive link b e tw e e n th e ro a d ,
th e ru nning g e a r, a nd th e d rive r. In -
s te a d , b y m e a ns o f a n a c tive m od ific a -
tio n to th e s e a t' s s urfa c e , th e s e a t
c a us e s we ight tra ns fe rs whic h a re s light
a nd im p e rc e p tib le . Th e b a s ic s e a tin g
p os itio n is n ot c ha nge d b y th is .
In th e s e a t' s u p hols te ry, b e ne a th th e
s urfa c e o f th e s e a t, th e re is a c us hion o f
fluid o n th e le ft a nd rig ht. Th e flu id is
s lowly c irc ula te d b a c k a nd fo rth b e -
tw e e n th e c us hions b y m e a ns o f a
p um p .
Online Edition for Part-No. 01 41 9 791 187 - © 12/98 BMW AG
| Categories | BMW 7-Series Manuals, BMW Manuals |
|---|---|
| Document Type | Free Auto PDF Owners Manual Download |
| Tags | BMW 740i, BMW 740iL, BMW 750iL, BMW E38 |
| Model Year | 1999 |
| Download File |
|
| Document File Type | |
| Publisher | bmwusa.com |
| Wikipedia's Page | BMW 7-Series (E38) |
| Copyright | Attribution Non-commercial |
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