Turning on and Changing the Frequency of the Audiovox XMFM1 FM Direct Adapter
Turning on the Audiovox FM Direct Adapter
With the ignition on, the FM Direct Adapter is always on in a standby condition. When you turn on your XM radio receiver, the adapter will automatically switch the vehicle FM signal input from your FM antenna to the XM Audio signal
Changing the Transmitting Frequency
The FM Direct Adapter allows you to input the signal from your XM Radio receiver directly into your vehicle’s radio. You can select the frequency on which the broadcast is sent from your XM radio receiver controls. (See your XM radio user manual for more information.) Set your vehicle’s radio to the same FM frequency as the one selected for your XM radio receiver.
You can also access the Installation Manual here.