TechniSat DIGITRADIO 231 OD Manual page 130

> Select the menu item [Sleep] with the TUNING/SKIP buttons and press the
SELECT button.
> Using the TUNING/SKIP buttons, you can set the period as intervals of Off, 10, 20,
30, 60, 70, 80 and 90 minutes, after which the device is switched to standby
(mains operation) or switches off (battery operation) from any operating mode.
> After selecting a time interval press the SELECT button.
If you access the Sleep Timer menu as described above, the remaining running
time is shown. An active sleep timer is also shown in the display by a moon
symbol with the remaining time.
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