TechniSat DIGITRADIO 10 C Instruction Manual page 117

Alternatively, the corresponding one-touch button 1 - 10 on the remote control
can be used. For stations in memory slots 11 - 20, press the Number entry
button (17) and another number (e.g. number entry + 3 for memory slot 13).
7.2.5 Overwriting/deleting a station memory slot
> Simply save a new station in a favourite memory slot as described.
When retrieving the factory settings all memory slots are deleted.
7.2.6 Signal strength
> Press the INFO button repeatedly until the signal strength bar is displayed.
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