Sirius XM RAdio Onyx User Manual page 74

Configuring Your Onyx
down the list until you find an FM channel that allows you to hear XM
clearly.
NOTE! You may find an FM channel with static or silence that does not work with
Onyx. It is possible that some type of inaudible interference is present that
prevents reception of the Onyx broadcast. Your only options are to use another
FM channel or a different audio connection method.
TIP! If you regularly drive from one location to another, such as your daily
commute, you may need to use different FM channels along your route for best
performance. If this is the case, we recommend saving the best FM channels as
presets on your FM radio and Onyx. Then you simply select and match the best
channel for the area you are in.
TIP! It will be much more difficult to find available FM channels in large cities
than in most suburban or rural locations. A direct audio connection using the
Aux In Cable, Cassette Adapter or professional installation is your best solution
if you drive in or near large metropolitan areas.
NOTE! The performance of FM radios are different, based on manufacturer and
vehicle style. Some may not work well with the type of FM transmitter used by
Onyx. This is why we recommend a direct audio connection using the Aux In
Cable or Cassette Adapter if they can be used in your vehicle. Professional
installation can also resolve almost any performance issue.
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