TechniSat DIGITRADIO 231 OD Manual page 137

13.1.3 Setting the time format
Under the Time format sub-menu you can activate the 12 or 24 hour format.
> Open the main menu by pressing and holding the INFO/MENU button.
> Use the TUNING/SKIP buttons to select the menu item [System settings] >
[Date/Time] > [Time Format] and press the SELECT button.
> Use TUNING/SKIP to select the following options:
[24 hours]
[12 hours]
> Press the SELECT button to apply.
> Press the INFO/MENU button several times to exit the setting.
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