on the remote, press radio to turn on the radio. the last selected radio station will play. pressing radio while the system is on will switch between fm and am.
When you select FM radio, RDS information for the current station is displayed. This is controlled by the RADIO TEXT setting in the setup menu.
To disable RDS and view only the station frequency, change the RADIO TEXT setting to OFF. See Turning RDS on or off
when you press radio, seek/track or tune/mp3 to tune to a radio station, the frequency appears in the centre of the display while you are tuning.