Signal Processing Module: Description and Operation

GF82.62-P-5000FL Digital Audio Broadcasting control unit, component description
- with CODE (537) Digital radio

Component Identification:

Location
The Digital Audio Broadcasting control unit is located in the trunk at the left under the trunk paneling on the sidewall.

Depending on equipment installed, one of the following audio devices is installed:
- Radio (A2) (with code (510) Audio 20 with CD changer)
- Radio with auto pilot system (A2/56) (with code (525) MB Audio 50 APS radio or with code (511) Audio 50 APS with DVD changer)
- COMAND controller unit (A40/3) (with code (527) COMAND APS with single DVD drive (with navigation) or with code (512) COMAND APS incl. DVD changer)

Task
^ Receive signals
^ Decoding of signals
^ Transmitting signals

Receive signals
Direct lines
- Circuit 30g
- Circuit 31
- Wake-up
- "Digital Audio Broadcasting (Digital Radio) (DAB) L BAND signals" from the multifunction antenna (A28/11) over coaxial line
- "DAB Band III signals" over the rear window antenna structure and coaxial line to the antenna amplifier FM 2 and DAB (A2/19)

Processing of two different DAB frequency ranges:
^ "L band signals" (mainly from conurbation stations)
^ "Band III signals" (mainly from interregional stations)

Decoding of signals
The Digital Audio Broadcasting control unit decodes the "DAB L- band signals" and "band III signals" to obtain pulse code modulation (PCM) signals.

Transmitting signals
Media Oriented System Transport (MOST) signals
- DAB status
- Station lists
- Audio signals