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Posted by davy on 09/05/07 19:09
Digital transmissions are usually 'multiplexed'... channels transmitted
in a group, this usually calls for a wideband antenna, one that can
receive over a group of channels rather than one designed for a single
group.
Digital transmission's are usually of lower power than normal analogue
transmissions, unless the reception is exceptionally good any old
antenna is not going to work, under these circumstances some channels
will be received and others won't or picture freezing becomes an issue
due to lack of signals.
Indoor antennas usually suffers from 'ghosting', due to phase
differences caused by signal reflections.
All you need is a loss of a single packet of the 'data stream' and
you've got drop out... just like Sky TV in a heavy rain storm.... or a
skipping and jumping CD or DVD.
Davy
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