BMW E65 User Manual download pdf (Page 47)

E65 Bus Systems

The transmitter/receiver (SE) module contains the LED for the driver circuit and the receiv-

er amplifier for converting the optical signals into digital signals. It also has an integral trans-

mission quality monitoring circuit.

If one of the following faults occurs on one of the fiber-optic cables, the satellite

concerned is shut down:

• No optical signal received over a pre-defined period.

• Transmitter diode sends a continuous light signal.

• Attenuation on the fiber-optic cable too great.

The permissible degree of attenuation is stored within the system. If the attenuation

exceeds the specified maximum level, one of the following faults may be the cause:

• Kinking in the fiber-optic cable.

• Compression of the fiber-optic cable.

• Stretching of the fiber-optic cable.

• Broken fiber-optic cable.

• Damaged fiber-optic cable.

SIM

KT-6562

Satellites

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BMW E65 User Manual Page 47