Radio Reception

Fig 1: Identifying Radio Reception Signal Diagram To AM/FM Tuner Module (AFM)

Courtesy of VOLVO CARS OF NORTH AMERICA.

During radio reception the signals from the AM or FM wavebands are gathered by the antenna system. The signals are decoded and are transmitted to the AM/FM tuner module (AFM) (16/94).

The AM/FM tuner module (AFM) then transmits the signals on via the MOST network to the audio module (AUD) (16/105) and infotainment control module (ICM) (16/1).

For FM-transmissions, RDS-reception (Radio Data System) is possible (market-dependent).

The User can choose to store channels manually one at a time or to automatically store the 10 channels with the strongest broadcast signal. Automatic search stores the program channels in ascending frequency order.

For each preset channel the AM/FM tuner module (AFM) stores information about:

• frequency
• program identification code (PI)
• program channel name (PS).

The control module stores information about:

• Regional: On/Off
• AF: On/Off
• EON: Off/Local/Distant
• TP Station: On/Off
• TP Search: On/Off
• Favorite TP Station
• Favorite News (PTY1)
• Activated PTY-categories
• Frequency band: AM/FM/Off
• Latest stored frequency.

The control module uses the information to reset the user settings between each driving cycle.