GF82.60-P-2001QMU Radio Mode, Function
GF82.60-P-2001QMU Radio Mode, Function
- with CODE (530) COMAND APS USA (with navigation system)
After the radio menu has been activated by pressing the "FM/AM" button on the COMAND operating, display and controller unit (A40/3), the antennas in the rear window on model 209.3 receive high frequency (HF) signals for ultra-short wave (FM), short wave (SW), medium wave (MW), and long wave (LW). On model 209.4 the antenna in the windshield receives the HF signals for FM, and the AM trunk lid antenna (A71/1) receives the HF signals for SW, MW, and LW. Modulated onto these HF signals are music, voice and data signals. The amplifier module 2, window antenna (A2/72) of model 209.3 filters the frequencies of the radio frequency bands out of the HF signals received and amplifies them. On model 209.4 the left antenna amplifier module (A2/64) as well as the AM trunk lid antenna amplifier (A2/16) filter the frequencies of the radio frequency bands out of the HF signals received and amplify them.
The amplified HF signals are then transmitted via a coaxial line to the radio receiver in the COMAND operating, display and controller unit (A40/3). The radio receiver demodulates the HF signals, in other words it separates the useful information (audible frequencies) from the carrier signal (inaudible). The demodulated audio signals are amplified and converted into sound signals by the vehicle speakers. If the vehicle is equipped with a sound amplifier (A2/13) (with code (810) Sound system), it performs the final amplification of the audio signals before they are output over the vehicle speakers. Moreover, the radio system offers the option to call up information on the current weather situation via the Weatherband (WB) channel at any time, which is transmitted via fixed frequencies.
FM antenna diversity, function
The "Antenna diversity" function allows the user to switch between the FM antennas of the rear window (model 209.3) and the FM antennas of the windshield (model 209.4). The function is automatic and is executed by the amplifier module 2, window antenna (A2/72) (model 209.3) as well as by the left antenna amplifier module (A2/64) (model 209.4). The radio tuner of the COMAND operating, display and controller unit (A40/3) merely generates the intermediate frequency (IF) signal, which is used by the amplifier module 2, window antenna (A2/72) (model 209.3) as well as by the left antenna amplifier module (A2/64) (model 209. as a reference to change the FM antenna.
Station selection options:
^ Automatic station search with the "Scan" function (the
^ stations of a waveband are played for t = 8 s)
^ Station search on multifunction steering wheel (MFL)
^ Manual station search
^ Station selection using list of stations
^ Station selection using numeric keyboard
^ Station selection using frequency input
^ station selection from the memory (10 stations per waveband)
Satellite digital audio radio (satellite radio) (SDAR) (with code (536) SIRIUS satellite radio)
The SDAR control unit (N87/5) decodes the S-band satellite signals received by the SDAR antenna (A2/82) (model 209.3 up to 31.05.06, model 209.4) or the SDAR antenna (A2/49a4) (model 209.3 as of 1.6.06) and then forwards them via the Media Oriented System Transport (MOST) to the COMAND operating, display and controller unit (A40/3). The satellite radio function can be called up in the audio menu. It is possible to receive digital satellite stations. The prerequisite is that this has been enabled by a network provider. If the system is enabled, between 100 and 224 additional stations can be received.
Since modification year 07/1 the SDAR control unit (N87/5) (3rd generation) has been used, which is now also available for vehicles with code (460) Additional parts, Canadian vehicles. The SDAR control unit (N87/5) (3rd generation) differs from previous generations through the following features:
^ Shorter response times
^ Improved reception properties
^ Temperature and electromagnetic compatibility (EMC) properties have been optimized
