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Home >> BMW >> 2004 >> 645Ci 2D Convertible, Standard >> Repair and Diagnosis >> Electrical >> Gauges >> Communication Systems - Si Techniques - E60, E61, E63, E64, E87, E90 >> Car Communication Computer (CCC) E60, E61, E63, E64, E87, E90 >> Introduction >> Brief Description Of Components >> E60, E61, E63, E64 - Aerial Diversity

E60, E61, E63, E64 - Aerial Diversity

Installation location 

Aerial diversity is located on the upper right on the rear window in a carrier housing. The carrier housing is glued to the rear window. Aerial diversity is connected to the carrier housing.

Construction 

Aerial diversity contains the aerial amplifier for:

The power supply of the aerial amplifier for FM and AM is supplied via the terminal RAD_ON. Power to the amplifier for remote control services is supplied via terminal 30. In vehicles with TV function, aerial diversity also contains the aerial amplifier for:

Power is supplied to the two aerial amplifiers from video module 5 via separate coaxial cables.

How it works 

The aerial signals are transferred via spring contacts on the carrier housing to the aerial amplifiers. One of the FM1-4 aerials is selected for reception via the "Aerial diversity" function. If the aerial signal of one of the 4 aerials decreases, one of the other aerials with the strongest reception is automatically selected. Aerial diversity is switched via the intermediate frequency signal of the two-tuner radio. The intermediate frequency signal is transmitted from the two-tuner radio to the aerial amplifier by the coaxial cable. The aerial signals for AM, FBD, TV1 and TV2 are each amplified by their own aerial amplifier.

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