GF82.60-P-3021FL Satellite Digital Audio Radio (Satellite Radio) (SDAR) Function

GF82.60-P-3021FL Satellite Digital Audio Radio (Satellite Radio) (SDAR) Function
- with CODE (536) SIRIUS satellite radio

Function requirements, general
^ Status circuit 30g ON

Satellite digital audio radio (satellite radio) (SDAR), general
On vehicles up to 31.5.2010, the SDAR/high definition tuner control unit (N87/8) is installed and as of 1.6.2010, the satellite digital audio radio (SDAR) control unit (N87/5) is. Both devices are the same in terms of function in model 212 and are referred to below as SDAR control unit. The SDAR control unit enables the reception of stations from the provider "Sirius satellite radio" and supports the Real Time Traffic Data (RTTD) traffic data service that can be used by the navigation processor of the COMAND controller unit (A40/3) (with code (512) COMAND APS with DVD changer).

The SDAR control unit is controlled using the COMAND controller unit.
The information or displays required for control are shown on the Audio/COMAND display (A40/8) and in the instrument cluster (A1).

The system can be operated using the following components:
- Left multifunction steering wheel button group (S110)
- Group of buttons on right of multifunction steering wheel (S111)
- Audio/COMAND control panel (A40/9)
- Buttons on COMAND control unit
- Hands-free system microphone (A67b1) via the voice control system (VCS [SBS]) (with code (512) COMAND APS with DVD changer)

SDAR function sequence
The Sirius satellite radio signal is broadcast 3 times to achieve reception diversity (using 2 satellites and one terrestrial transmitter). The multifunction antenna (A28/11) receives all 3 channels (sat 1, sat 2, terrestrial transmitter). The multifunction antenna forwards the signals via a coaxial cable to the SDAR control unit. The SDAR control unit receives and decodes the signals. Following this, the SDAR control unit transmits the decoded, digital radio signals via Media Oriented System Transport (MOST) to the COMAND controller unit and, in vehicles with code (810) Sound system, to the sound system amplifier control unit (N40/3).

In vehicles with code (810) Sound system, the audio signals are output by the sound system amplifier control unit over the following speakers via direct lines:
- Center dashboard speaker (H4/27)
- Left rear surround speaker (H4/54)
- Right rear surround speaker (H4/55) (with model 212.2)
- Right rear surround speaker (H4/57) (with model 212.0)
- Left front door sound system tweeter (H4/68)
- Right front door sound system tweeter (H4/69)
- Left rear door sound system tweeter (H4/70)
- Right rear door sound system tweeter (H4/71)
- Left front door sound system midrange and bass speakers (H4/72)
- Right front door sound system midrange and bass speakers (H4/73)
- Left rear door sound system midrange speaker (H4/80)
- Right rear door sound system midrange speaker (H4/81)

For the bass speaker (H4/17) (model 212.0) or for the bass speaker (H4/29) (model 212.2), the audio signal is routed from the COMAND controller unit to the sound system amplifier control unit via MOST and from there to the bass speaker via the rear bass speaker amplifier (N40/9) using direct lines.

On vehicles without code (810) Sound system, the audio signals are output over direct lines by the COMAND controller unit to the following speakers:
- Left front door speaker (H4/1)
- Left front door tweeter (H4/1h1)
- Right front door speaker (H4/2)
- Right front door tweeter (H4/2h1)
- Left rear door speaker (H4/3)
- Left rear door tweeter (H4/3h1)
- Right rear door speaker (H4/4)
- Right rear door tweeter (H4/4h1)