Satellite Digital Audio Radio (SDAR) Control Unit, Component Description - GF82.85-P-3121GWU
Model 463
as of model year 2013 up to model year 2017
with code ZU8 (National version for USA)
Shown: Model 463.236
Location
The SDAR control unit is located in the load compartment on the left sidewall behind the paneling.
Tasks
The SDAR control unit has the following tasks:
- Receive signals
- Amplifying and decoding signals
- Transmitting signals
Receive signals
Signals are read in via the following connections:
- Direct line
- Media Oriented System Transport (MOST)
Direct lines
The SDAR control unit receives the following signals:
- Circuit 30g
- Circuit 31
- Wake-up
- Satellite Digital Audio Radio (SDAR) antenna (A2/82) (Satellite signals and terrestrial signals)
MOST
The SDAR control unit receives control signals from the COMAND controller unit (A40/3)
Amplifying and decoding signals
The SDAR control unit decodes the satellite signals (Time Division Multiplex (TDM)) and the terrestrial signals (Coded Orthogonal Frequency Division Multiplex (COFDM)) into pulse code modulation (PCM) signals and amplifies them.
Transmitting signals
- Direct line
- MOST
Direct line
The SDAR control unit supplies the satellite digital audio radio (SDAR) antenna with power via the signal line.
MOST
The SDAR control unit transmits the following signals:
- The audio signals to the COMAND controller unit or to the sound system amplifier control unit (N40/3) (with code EU9 (Harman Kardon® Logic 7® surround sound system))
- Status of SDAR control unit, program-specific supplemental information (e.g. artist, track name) as well as music genre (e.g. "ROCK", "NEWS") to the COMAND controller unit
- Demodulated and decoded digital S-band satellite as well as S-band terrestrial signals as digital traffic and weather data signals to the navigation unit integrated into the COMAND controller unit
| Satellite Digital Audio Radio System (SDAR) wiring diagram | PE82.60-P-2300-97ZGA |