1 Series E87 118d (M47T2) 5-door
SDARS (Satellite Digital Audio Radio Service) facilitates digital radio reception via satellite and terrestrial
reception via stationary aerials
[for more information, please refer to SI Technology (SBT) 65 03 03 058 ]
System functions
The following aerial system functions are described:
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Aerial diversity for FM aerials
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Diagnosis function for aerial diversity
Aerial diversity for FM aerials
To ensure the best possible reception, aerial diversity works as follows:
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One of the aerials (FM 1) receives the required radio station.
•
If the signal from this aerial deteriorates, the system switches to one of the other aerials (FM 2, FM 3, FM 4)
with a stronger signal.
> E93
Depending on the position of the convertible hardtop (closed or open), aerial diversity will switch to either the
aerials in the rear window or the aerials in the rear left and rear right side trim for radio reception.
The Convertible Top Module (CTM) records the position of the convertible hardtop. The CTM transmits a signal
through a direct wire to aerial diversity.
Diagnosis function for aerial diversity
Aerial diversity self-diagnosis comprises a check of the aerial inputs based on DC current measurement. In
diagnosis mode, the AM/FM tuner switches each FM aerial on individually in turn.
AM reception can be evaluated with the AM amplifier switched on and off. A comparison of the results will
produce the diagnosis output.
Notes for service staff
The following information is available for service staff:
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General note: [more ...]
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Diagnosis: [more ...]
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Encoding/programming: ---
National versions
The following details are available with regard to national versions:
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Japan national version
Navigation system with VICS: Vehicle Information and Communication System
Current highway traffic data are displayed to the driver in the navigation system. Information is gathered from
various sources and transmitted to the central VICS module:
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Highway management
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Police
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Highway traffic information centre
Information is provided by radio and infrared transmission for the current stretch of road. In urban areas,
information is also displayed on display boards. In this way, delays are reduced and other information is
displayed such as accident locations, construction sites and free parking spaces.
SBT Aerial system E87, E90, E91, E92, E93, R56
BMW AG - TIS
18.01.2013 18:48
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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