Sharper Image OQ314 Instructions Manual page 13

When the clock is receiving a radio signal, the radio reception
icon starts to blink. A complete reception generally takes about
2 to 10 minutes, depending on the strength of the radio signal.
When the reception is complete, the radio reception icon stops
blinking. The strength of the reception for the last full hour is
indicated.
For better reception, place the unit away from metal objects and
electrical appliances to minimize interference.
Should you wish to deactivate the RF (radio-frequency) controlled
function, press and hold the DOWN ROTARY KNOB for 3 seconds
and the radio reception icon disappears. To reactivate the RF con-
trolled function, press and hold the UP ROTARY KNOB button for
3 seconds again and the radio reception icon reappears.
About Radio Reception
Strong Signal
Weak Signal
No Reception
Receiving Signal