Diversity aerial: Notes

A distinction is made between the following systems for the aerial diversity:

• Scan diversity  , e.g. in connection with CHAMP (multimedia platform) or CIC (Car Information Computer)

  The aerial diversity with aerial amplifier is a system which automatically switches to the next aerial if the quality of radio signal received on the active aerial is inadequate.

  The aerial amplifier forwards the amplified signal of the radio station received via an aerial line to the tuner in the headunit.

• Phase diversity  , e.g. in connection with HU-B (headunit basis) or HU-H (headunit high)

  The system consists of an aerial amplifier and a diversity function in the headunit. The aerial amplifier relays the amplified signals of the radio station received to the headunit via 2 aerial lines. In the headunit the two aerial signals are mixed using the diversity function so that an optimal received signal is generated.

Depending on the series, vehicle equipment and national-market version, the configuration of the aerial diversity module can vary. The aerial diversity may therefore include the following aerial connections:

• FM aerials (UKW)
• AM aerial (MW, KW, LW)
• VICS aerial (VICS stands for Vehicle Information and Communication System; Japan navigation system)
• DAB aerial (frequency range: band III)
• TV 1 aerial

In the US version, the aerial amplifier also supports Weatherband frequencies. Weatherband is transmitted on seven channels in the frequency range of 162.400 MHz to 162.550 MHz. The Weatherband tuner is incorporated in the headunit of the FM module.