View Single Post
  #94   Report Post  
Old 03-11-2005, 05:07 PM
Jaques d'Alltrades
 
Posts: n/a
Default The BBC's "Big Dig" Mystery

The message
from martin contains these words:

All UK analogue TV transmission will be phased out between 2007 and
2012, enabling transmitter power to be increased, which should produce
better/stronger digital signal. You may get it then.


It's not so simple. Digital TV needs line of site for good reception.


Line of what?

Whether a signal requires a clear line of sight between antennae depends
on frequency, not mode of transmission.

TV signals will bounce from solid objects at their frequency, whereas at
higher frequencies they tend to be absorbed. Certainly at frequencies
approaching a gigahertz even a tree in leaf will block a signal, but at
TV frequencies, they won't.

If a even weak analogue signal can be received, a digital one of the
same strength is likely to be processed much better.

However, that's not to say it will be ideal.

--
Rusty
horrid dot squeak snailything zetnet point co full-stop uk
http://www.users.zetnet.co.uk/hi-fi/