GF82.85-P-3121FL Satellite Digital Audio Radio (SDAR) Control Unit, Component Description

GF82.85-P-3121FL Satellite Digital Audio Radio (SDAR) Control Unit, Component Description

MODEL 212
- with CODE (536) SIRIUS satellite radio
- as of model year 2011 /YoM 10







N87/5 Satellite digital audio radio (SDAR) control unit

Location
The SDAR control unit is located in the trunk on the left side behind the paneling on a bracket.

Task
- Reception of signals
- Amplifying and decoding signals Transmission of signals
- Transmission of signals

Receive signals
Signals are read in via the following connections:
- Direct line
- Media Oriented System Transport (MOST)

Direct lines
- Circuit 30g
- Circuit 31
- Wake-up
- Multifunction antenna (A28/11) (for satellite signals and terrestrial signals)

MOST
- Control signals from COMAND controller unit (A40/3)

Amplifying and decoding signals
The SDAR control unit decodes and amplifies the satellite signals (Time Division Multiplex (TDM)) and terrestrial signals (Coded Orthogonal Frequency Division Multiplex (COFDM)) into pulse code modulation (PCM) signals.

Transmission of signals
- Direct line
- MOST

Direct line
- Multifunction antenna (power supply to antenna, phantom supply via antenna input)

MOST
- Audio signals to sound system amplifier control unit (N40/3) (with code (810) Sound system)
- Status of SDAR control unit, program-specific supplemental information (e.g. artist, track name and composer) as well as music genre (e.b. "ROCK", "NEWS") to the COMAND controller unit
- Demodulated and decoded digital S-band satellite as well as S-band terrestrial signals as digital traffic data signals to the navigation unit integrated into the COMAND controller unit (with code (512) COMAND APS with DVD changer)