Samsung PN51E490B4FXZA - Manual (Page 20)

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English
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Fine Tune
(analog channels only)
If the reception is clear, you do not have to fine tune the channel, as this is done
automatically during the search and store operation. If the signal is weak or
distorted, fine tune the channel manually.
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Select Fine Tune in the Channel menu.
N Fine tuned channels that have been saved are marked with an asterisk “*” on
the right-hand side of the channel number in the channel banner.
N To reset the fine-tuning, select Reset .