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Terrestrial Broadcasting
Terrestrial Television, Digital and Analogue
digital threshold
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<blockquote data-quote="spiney" data-source="post: 170570" data-attributes="member: 192438"><p>Well, 17dB is the theoretical minimum needed. If you're measuring at the aerial - so have to add on cable losses - and then consider that most receivers do "worse than the best", then yes 23 dB CNR (carrier to noise) would be "reasonable" for digital reception to start working.</p><p></p><p>Yes, agreed, the transmitted power levels for analogue and digital are rather different, and there can be problems, and some people recommend "as standard" separating the digital muxes and amplifying separately before recombining. Which sometimes you might have to. I say "if it ain't broke, don't fix it".</p><p></p><p>eg see <a href="http://www.teldis.com/TP-headendcomp.htm" target="_blank">www.teldis.com/TP-headendcomp.htm</a> .</p></blockquote><p></p>
[QUOTE="spiney, post: 170570, member: 192438"] Well, 17dB is the theoretical minimum needed. If you're measuring at the aerial - so have to add on cable losses - and then consider that most receivers do "worse than the best", then yes 23 dB CNR (carrier to noise) would be "reasonable" for digital reception to start working. Yes, agreed, the transmitted power levels for analogue and digital are rather different, and there can be problems, and some people recommend "as standard" separating the digital muxes and amplifying separately before recombining. Which sometimes you might have to. I say "if it ain't broke, don't fix it". eg see [URL="http://www.teldis.com/TP-headendcomp.htm"]www.teldis.com/TP-headendcomp.htm[/URL] . [/QUOTE]
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Terrestrial Broadcasting
Terrestrial Television, Digital and Analogue
digital threshold
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