Sirius Satellite Radio SDST5V1 - Manual (Page 57)

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5 When your service is activated, your Starmate 5 will display
an alert message . To continue, press any button . Thereafter, if
you press the Up or Down button you can scroll and tune other
channels . Activation usually takes less than 5 minutes, but
sometimes may take longer . We recommend that your radio remain
on until activated .