Audiovox XMCK-20P manual You will see a chart that looks like this

You will see a chart that looks like this:

This chart represents the FM channels in the Washington, DC area. The spikes represent the strength of the FM channel. Someone in DC would choose a “vacant” channel like 92.9 that is unused and located between two weaker channels.

Next, power on your XpressR. Be sure all of your cables are properly connected. Go to channel 1, this is the preview channel. You will not hear any sound through your vehi- cle’s audio system until you have chosen an FM Frequency.

Note: XpressR will automatically enter a demo mode if either of these two conditions exists:

1.If your XM antenna is not connected and your XpressR is not activated.

2.If your XM antenna is connected, you are not receiving a signal, and your XpressR is not activated.

Note: Your XM radio may not modulate on each of the frequencies shown on the Radio-Locator site. Check your XpressR for the frequencies that are usable for you.

21 vehicle installation