R55, R56: Introduction
The number of radio services (transmission of messages by radio) in the vehicle is constantly growing: Services for communication, navigation, radio and sensor systems. The number or aerials has also increased in line with the additional radio services.
NOTE:
The description applies to vehicles with "High" equipment level.
Depending on the vehicle's equipment specification, not all of the aerials described here may be fitted. Attention will be drawn to differences due to certain equipment combinations or national versions.
In principle, radio services can be separated into terrestrial services and satellite services. Terrestrial radio services are broadcast via ground aerials (stationary aerials for terrestrial reception).
Terrestrial services include:
- AM-FM radio transmitters (analogue)
- DVB-T (Digital Video Broadcasting - Terrestrial)
- TV transmitters (analogue)
- DAB (Digital Audio Broadcasting). DAB makes digital radio reception possible.
- GSM dual band 900/1800 MHz (for mobile phones)
Satellite services include:
- GPS (signals for navigation)
- SDARS (Satellite Digital Audio Radio Service, US version only)
Aerials for vehicle systems (the aerials themselves are not dealt with in this SBT):
- Aerials for remote control or Comfort Access
- Bluetooth aerial for connecting mobile phones to the vehicle