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DAB maps - another update
Brian Butterworth published on UK Free TV
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Tuesday, 19 July 2011
Wednesday, 20 July 2011
...ah I see. My follow up post and the posts that other people who lept to my defence regarding SFNs must have been sucked up by the SPAM system?
Anyway... I managed a DAB multiplex network for four years, so I DO know a bit about how DAB SFNs work!
I can tell you that when a new TX is turned on, the others in the SFN are not adjusted. As long as the DAB transmitters are all sync'd by GPS, then it is just a case of turning a new site on and leaving the rest alone.
On rare occasions it may be the case that a particular location in a TX area may receive a signal from a local site, and another over 74km away - in this case the GPS timings would be tweaked rather than radiating patterns.
Otherwise, a DAB receiver is perfectly capable of receiving the same multiplex from more than one transmitter.
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