Circuit/System Description

WARNING: This page is about a different car, the 2018 Cadillac XTS. However, it is still accessible from the selected car via links, so may be relevant.

The diversity antenna system uses antennas applied as appliqu e s to the rear glass and a antenna amplifier and a antenna module. The antenna amplifier receives both AM and FM signals, while the left antenna module receives FM signals only. The antenna amplifier and module receive the signals from the glass antenna. Each antenna amplifier and module is connected to the radio by a coaxial cable.

The radio antenna amplifier and module is enabled when the radio is turned on. The radio provides battery voltage to the antenna amplifier and module using the center conductor of the antenna coaxial cable. When a 12 V signal is present on the center conductor of the antenna coax, the received signals are amplified.

When the AM band is selected on the radio, the antenna 1 amplifier connects the AM antenna to the radio. When the FM band is selected, both the antenna amplifier and module provide FM signals to the radio. The radio switches between the two FM antennas, monitoring the signal strength and combines the signals to create one stronger signal.