GF82.60-P-2001QMJ Radio Mode, Function
GF82.60-P-2001QMJ Radio Mode, Function
- with CODE (498) Japanese version
The radio menu is activated by pressing the "FM/AM" button on the COMAND operating, display and control unit (A40/3). If the user presses the "FM" or "AM button, the relevant basic screen appears with the menu entry for manually or automatically stored rad stations. A green bar-cursor highlights the radio station last listened to.
The radio mode can also be controlled by scrolling using the multifunction steering wheel. The following functions can be selected in the radio menu:
^ Auto-store (updates radio station lists according to quality)
^ Memory for 2 x 6 stations per waveband
^ Automatic memory for the strongest stations
^ Automatic interference suppression
^ Separate traffic information stations for the AM frequency band
^ FM stereo concept (with signal strength-dependent mono/stereo transition)
^ Signal strength-dependent high-cut
^ Memory function (last station)
^ Manual and automatic station search for all wavebands
^ "SCAN" function for all wavebands (stations are played for t = 7 seconds)
^ Traffic information
^ View presets
Radio mode, function
The radio function is made possible by a radio tuner integrated in the audio gateway control unit (N93/1). This radio tuner can only be operated using the COMAND operating, display and control unit (A40/3).
The radio frequency signals required for the radio are received by the 4 FM antennas and one AM antenna on the rear window in model 209.3 or by the 4 FM antennas on the windshield and the AM trunk lid antenna (A71/1) in model 209.4. The antennas are connected to the amplifier module 2, window antenna (A2/72) (model 209.3) or the left antenna amplifier module (A2/64) (model 209.4). The AM trunk lid antenna (A71/1) (model 209.4) is connected to the AM trunk lid antenna amplifier (A2/16) (model 209.4). The music, voice and data signals are superimposed on the radio frequency signals. The amplifier modules filter the frequencies from the radio frequency bands out of the radio frequency signals received and amplify them. The amplified signals are then transmitted via a coaxial line (AM, FM) to the respective radio tuner (AM or FM) in the audio gateway control unit (N93/1). The radio tuner demodulates the radio frequency signals. The useful information (audible frequency) is separated from the carrier signal (inaudible frequency). The audio signal amplifier in the audio gateway control unit (N93/1) amplifies the audio signals and outputs the sound via the vehicle speakers.
If the vehicle leaves the broadcasting range of the radio station, the system does not attempt to retain the radio station. In this case the current frequency assignment applies for the relevant broadcasting area.
Some radio stations also broadcast other digital information (stock exchange figures, weather reports, etc.) in addition to their radio program. This information can be read in the form of a video text on the display of the COMAND operating, display and control unit (A40/3).
FM antenna diversity, function
For this purpose, the system automatically switches between the FM antennas depending on the reception. This function is carried out by the amplifier module 2, window antenna (A2/72) (model 209.3) or the left antenna amplifier module (A2/64) (model 209.4). The radio tuner merely generates the intermediate frequency signal which serves as a reference for changing the FM antenna.
