Satellite digital audio radio (SDAR) control unit, component description - GF82.85-P-3121CEU
MODEL 204.0 with CODE (536) SIRIUS satellite radio with CODE (523) MB Audio 20 radio with CODE (510) Audio 20 with CD changer as of model year 2009 /YoM 08
MODEL 204.0 up to 31.5.09 with CODE (536) SIRIUS satellite radio with CODE (512) COMAND APS with DVD changer as of model year 2009 /YoM 08
MODEL 204.9 with CODE (536) SIRIUS satellite radio with CODE (523) MB Audio 20 radio with CODE (510) Audio 20 with CD changer
MODEL 204.9 up to 31.5.09 with CODE (536) SIRIUS satellite radio with CODE (512) COMAND APS with DVD changer
MODEL 204.0 /9 with CODE (536) SIRIUS satellite radio as of model year 2011 /YoM 10
MODEL 204.3 with CODE (536) SIRIUS satellite radio
Shown on model 204.0
Location
The Satellite digital audio radio control unit (SDAR) is located in the trunk on the equipment bridge in front of the spare wheel well
Task
- Receive signals
- Amplifying and decoding signals
- Transmit signals
Receive signals
Signals are read in via the following connections:
- Direct lines
- Media Oriented System Transport (MOST)
Direct lines
- Circuit 30g
- Circuit 31
- Wake-up
- Multifunction antenna (A28/11) (for satellite signals and terrestrial signals)
Media Oriented System Transport (MOST)
- Control signals from audio equipment
Amplifying and decoding signals
The Satellite digital audio radio control unit (SDAR) decodes and amplifies the satellite signals (Time For Division Multiplex (TDM)) and terrestrial signals (Coded Orthogonal Frequency Division Multiplex (COFDM)) in pulse mode modulation (PCM) signals.
Transmit signals
The signals are transmitted via the following connections:
- 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) or audio equipment (except code (810) Sound system)
- SDAR status, program-specific information (e.g. artist, track name and composer) as well as music category (ROCK, NEWS and similar) to audio equipment
- As of 1.6.10: Real Time Traffic Data real time traffic service (RTTD) to navigation processor of COMAND controller unit (A40/3) (with code (512) COMAND APS incl. DVD changer)
| Technical data Designation |
Unit | Values | Tolerance range | Remarks |
|---|---|---|---|---|
| Satellite digital audio radio (SDAR) control unit | ||||
| Power supply | VV | 13 | Battery voltage UB | |
| Voltage limits | VV | 9, 3 | Minimum UBmin | |
| VV | 16 | Maximum UBmax | ||
| Power consumption | No data | |||
| Reverse polarity protection | VV | -16 | Continuously | |
| Additional specific parameters | None | |||
| Special features | None | |||
| Flash capability/coding capability | YES/NO |
| Wiring diagram for satellite digital audio radio (SDAR) control unit | PE82.60-P-2301-97FAA |