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

GF82.85-P-3121FQ Satellite Digital Audio Radio (SDAR) Control Unit, Component Description
MODEL 218
- with CODE (536) SIRIUS satellite radio





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
The SDAR control unit has the following tasks:
^ Receive signals
^ Amplifying and decoding signals
^ Transmit signals

Receive signals
The SDAR control unit receives signals via the following connections:
^ Direct line
^ Media Oriented System Transport (MOST)

Direct lines
The SDAR control unit receives the following signals via direct lines from the corresponding components:
- Wake-up signal from COMAND controller unit (A40/3)
- Satellite radio signals and terrestrial radio signals from the multifunction antenna (A28/11)

Media Oriented System Transport (MOST)
The SDAR control unit receives control signals from the COMAND controller unit.

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

Transmit signals
The SDAR control unit sends the following signals via MOST to the corresponding control units:
- Audio signals to the 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 and S-band terrestrial signals as digital traffic data signals (as of 1.7.11 also weather data signals) to the navigation unit integrated into the COMAND operating, display and controller unit