January 24th 08, 06:38 PM
posted to uk.d-i-y,uk.rec.audio,uk.tech.broadcast
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DAB aerial
the distance you refer to is 56 km.....
"Don Pearce" wrote in message
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On Wed, 23 Jan 2008 23:26:22 +0000 (GMT), "Dave Plowman (News)"
wrote:
In article ,
Andy Burns wrote:
I've always used my vertical Band II (aka FM band) dipole
for DAB, it works very well, pulling in distant muxes from miles away.
If you pull in distant (i.e. over 46 miles) signals won't that harm the
BBC SFN signal from your local TX? also you'll just get "n" copies of
Gold/Chill/Galaxy/Heart/Traffic/XFM
IIRC, it's a feature of DAB that receiving a second signal from a
different transmitter can be a benefit as it adds to the original -
rather causing multipath problems as with FM.
Up to a point. There is a guard interval that allows multipath signals
up to a certain amount of delay (hence distance). I can't remember
what that distance is, but I know it is less than it would have been
if they hadn't gone for the "available now" option, but waited for the
chip sets that permitted more, slower carriers.
d
--
Pearce Consulting
http://www.pearce.uk.com
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