Page 43 of the Owners Manual
10. RADIO: Press repeatedly to select AM1/AM2AST/FM1/FM2AST
frequency bands. Use the soft keys to select from possible on-screen
options of: Mute (mutes your current playing media), AST (Autostore
feature), Manual Tune (select to manually tune up/down the frequency
band) or Info (provides additional information if available). You can also
press RADIO to return to the radio base screen when browsing.
Autostore feature: The autostore feature allows you to store the 10
strongest local stations available from the AM and FM frequency bands.
To use, press the AST soft key at the bottom of the screen. The display
will read ‘Hold to start autostore’. Continue holding the button until
‘Autostoring’ appears in the display. When the search is complete, the
sound will return and the 10 strongest stations will be stored in the
memory presets (and overwrite any stations previously stored in the AST
band). You can also manually store stations in the AST band. When the
AST band is active, simply tune to the desired station and press and hold
a memory preset. The new station will be saved and will override the
previously saved station.