Diversity Antenna System

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

This diversity antenna system is comprised of 2 antennas, 1 radio antenna module, coax cables, and an FM composite signal from the radio to the left antenna module. In AM mode the system functions as follows: The antenna module takes the signal from the rear AM antenna. The antenna module amplifies this signal and sends it to the radio. In FM mode the system functions as follows: In this mode the radio supplies 5-8V over the FM composite signal wire and this switches the module into FM mode. The antenna module takes signal from the Front antenna and mix that signal with the signal from the rear antenna. The antenna module amplifies both signals and sends the combined signal to the radio. The FM composite signal also provides a feedback signal to the antenna module, which indicates the quality of the signal.