GF82.62-P-0001TXC Antenna System (ATS), Function
GF82.62-P-0001TXC Antenna System (ATS), Function
- with CODE (498) Japan version
Preliminary remarks
The following description specifies the antenna systems for
^ HIGH Class Japan (Code 529) (COMAND Japan with navigation Japan) and
^ Radio remote control with reduced range without panic button (code 761)
are described in the following.
General information
The various antennas are designed according to their special reception and transmission ranges. There are active and passive antennas. The antennas can be designed as transmitting, receiving or transmitting/receiving antennas.
The antennas transmit or receive data and voice output by converting electromagnetic radio waves into electric voltage and vice versa.
Active antennas are supplied with power and have an integrated amplifier. The voltage can be supplied over separate lines or over coaxial cables, over which the actual signals are also transmitted. In this case, no separate leads are required for the power supply. The installed active antenna is
^ the GPS antenna (A2/49a2).
Passive antennas do not require a power supply.
The installed passive antennas are
^ the antennas in the rear window.
Transmitting/receiving antenna is
^ the telephone antenna (A2/49a1).
Receiving antennas are
^ the antennas in the rear window and
^ the GPS antenna.
The telephone antenna and GPS antenna are integrated in the telephone and GPS roof antenna (A2/49).
Description, block diagram of antenna system
The AM, FM1, FM2, FM3, FM4, TV1 and TV2 signals received via the antennas integrated in the heated rear window as well as the
RRCL [FZV] signal are sent to the left antenna amplifier module (A2/64).The TV3 and TV4 signals and the VICS signal are sent to the right antenna amplifier module (A2/65).
The AM/FM signals are filtered and amplified in the left antenna amplifier module and in the right antenna amplifier module and sent to the audio gateway control unit (N93/1)
The audio gateway control unit supplies the diversity unit in the left antenna amplifier module with the IF [ZF] signal for activating the diversity processor.
The necessary information on operation of the different functions of the audio gateway control unit are transmitted via the digital data bus (MOST).
The left and right antenna amplifier modules supply the TV signals (TV1 to TV4) filtered and amplified to the TV antenna selector (A2/79).
A reference signal (RF) is generated in the COMAND operating, display and control unit (A40/3) to minimize reception interference.The RF signal is needed to actuate the TV antenna selector in a manner that ensures that the strongest TV antenna signal is relayed to the COMAND operating, display and control unit (diversity function).
The RRCL [FZV] signals sent by the transmitter key (A8/1) are received by the antenna integrated in the heated rear window. These signals are filtered and digitized in the left antenna amplifier module and sent to the rear SAM control unit with fuse and relay module (N10/2), from where they are forwarded over the CAN bus.
The signals received by the GPS antenna are sent to the GPS box control unit (N41/6). The data required for the navigation display are sent via data lines to the COMAND operating, display and control unit.
Telephone signals are transmitted and received via the telephone antenna and relayed to the Portable CTEL separation point (X39/37) of the telephone preinstallation.
The handset transmitter and receiver connector (X39/5) of the telephone preinstallation is connected to the COMAND operating, display and control unit.
Making telephone calls using the portable CTEL and the head unit
A compatible cellular telephone system (PDC) must be connected to the preinstalled standard PDC connector to use this function. The PDC connection is located in the telephone compartment of the center console.
