b-2. The submenu of channel block.
If you select any of the channel, the
channe l can not receive signal unless
you unblock it.
b-3 . The submenu of program block.
Age Rating: The program will be
blocked if the age you set is below that
the program confine.
b-4. The submenu of input block.
If you select any of the source ,the
source can not be used unless you
unblock it.
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