GF82.61-P-0004QU Audio 30 Function

GF82.61-P-0004QU Audio 30 Function
- with CODE (255) Audio 30
- with CODE (491) U.S. version







The radio (A2) has a compact disk drive and can be combined with a CD changer (6CDs).

The radio (A2) is the central control panel for the entertainment and communications systems integrated in the vehicle within the D2B ring. To input and output information it has a display, function keys, a rotary controller and a cross rocker.

The following are the maximum connection options:
^ Sound system
^ CD changer
^ Telephone
^ Voice control

Some functions can be activated using the multifunction steering wheel buttons.
In the process it should be observed that all button operations on the multifunction steering wheel are first worked on by the instrument cluster (A1). The instrument cluster (A1) combines the incoming button operations with the current menu adjustment on the multifunction display (A1p13) and sends if necessary a corresponding CAN message via the interior CAN (CAN B) to the radio (A2).
The following information on this is displayed in the instrument cluster (A1):
^ Telephone numbers
^ Transmission frequencies
^ CD or cassette mode
^ Transmission station name

D2B bus system
The digital components of the radio (A2) are networked together by the D2B fiber optical cable bus system. The bus system is used to transmit data (control commands and useful information) between the various system components. As to some extent the individual components operate with various data formats and different requirements on bit rate and reliability are made, various bus systems are installed:
^ Digital Data Bus (D2B)
^ Interior CAN (CAN B)
^ Engine compartment CAN (CAN C)

The following conditions must be in effect for startup:
^ Transmitter key (A8/1) "circuit 15R ON"
^ D2B-ring active

The D2B components (e.g. the telephone) can also activate the D2B ring

System activation
If the rotary controller is pressed, the operating unit switches on. The volume is regulated at the rotary controller for the audio source adjusted in each case. The function keys switch over to the audio source desired by the user. The radio (A2) is operated via (A2):

^ Fixed programmed function keys
^ The alphanumeric button block
^ The eject button
^ Programmable function keys
^ The rotary controller with integral hands-free button
^ The cross rocker with operating button
^ The On button
^ The mute button
^ The control buttons on the multifunction steering wheel

Speed-dependent volume control (GAL function)
As the vehicle speed increases the driving noise increases (wind noise). In order to achieve optimum sound quality without touching the radio controls, the volume of the radio (A2) is adapted to the level of background noise. The vehicle speed data are transmitted via the CAN interior (CAN B).

Interfaces
Data is exchanged with the instrument cluster (A1) via the interior CAN (CAN B). Thus the instrument cluster (A1) receives from the radio (A2) the audio and telephone data for the multifunction display (A1p13) in the instrument cluster (A1) as well as the time via this bus.
Time synchronization between the radio (A2) and instrument cluster (A1) can also be performed via the multifunction steering wheel.