GF82.60-P-2001B Radio Mode, Function
GF82.60-P-2001B Radio Mode, Function
- with CODE (353) Audio 30 APS
The ultra-short wave (FM), medium wave (MW) and long wave (LW) high-frequency signals are received from the radio antenna mounted on the vehicle. The music, voice and/or data signals are modulated upon the high-frequency signals received. The high-frequency signals are forwarded by the radio antenna over a coaxial cable to the radio receiver in the radio and navigation unit (A2/56). The radio receiver demodulates the high-frequency signals, i.e. it separates the useful information from the high-frequency carrier signal. The demodulated audio signals are amplified and converted to sound signals by the vehicle speakers. Possibilities for radio station selection:
- Direct frequency input
- Manual station search
- Automatic station search (the stations on a waveband are played for approx. 8 s)
- Station selection from the memory (6 stations for each frequency range)
Radio Data System (RDS), function
Many radio stations, e.g. (FM) transmit in addition to the program additional information such as the station name, type of program (e.g. pop, culture, etc.), traffic station identification and alarm messages. This information is evaluated and shown on the radio and navigation unit (A2/56) display, provided that:
- the "RDS" function is switched on
- an RDS station is set and received.
When an RDS station is received with a traffic broadcast in the background the abbreviation "TP" (Traffic Program) appears on the radio and navigation unit display (A2/56).
Even when the RDS function is deactivated, the traffic station recognition and station following function remain in operation (if activated). RDS alarm messages are still issued. In this case, CD playback or radio reception is automatically interrupted.
2-tuner technology function
If interference occurs to reception while driving, the system attempts to receive the selected station on an alternative frequency with the aid of the second (integrated) receiver and switch over when reception is better. Moreover, the second radio receiver automatically generates a list of the receivable FM stations after switch-on, and this list is continuously updated during operation. The stations contained in the list can be called up sorted in alphabetical order with the station search buttons.
The station list is only available when the "RDS" function is activated.
At certain times, some radio channel programs are subdivided into regional programs.
Since the system automatically switches to an alternative frequency in the event of reception interference, this can lead to a change in the regional program (not the radio network). If this is not desired, the regional program function can be activated in the menu "REG". Switchover to an alternative frequency is then accomplished only within the regional program.
FM antenna diversity function (models 209.3/4)
The antenna diversity function undertakes a reception-specific switchover between the FM antennas on the rear window for model 209.3 (FM antennas of windshield for model 209.4). The function runs automatically and is executed by the window antenna amplifier module 1 (A2/71) for model 209.3 (left antenna amplifier module (A2/64) for model 209.4).
The radio tuner of the radio and navigation unit (A2/56) only generates the intermediate frequency (ZF) signal, which serves as a reference to change the FM antenna for the window antenna amplifier module 1 (A2/71) on model 209.3 (for model 209.4 left antenna amplifier module (A2/64)).
RDS Diversity/2-receiver technology function
The system consists of 2 FM receivers, a radio receiver and a search receiver. After turning on the radio system, the search receiver automatically generates a list of FM stations received, which is continually updated during operation.
Data such as reception quality, programs and alternative frequencies are stored. The audio receiver can therefore switch over inaudibly to an alternative frequency. The list appears in alphabetical order when the "FM station list" is called up. The stations which are displayed can be activated by selecting and confirming.