Craig Birkmaier wrote: > Do you think Bert would be willing to pay to help build > the infrastructure for a service that could deliver 40 or more > different programs to him in the free and clear? Yes, I would, because it would be a one-time expense. I object to being suckered into every Tom, Dick, and Harry's scheme of creating yet another "infinite revenue stream" for themselves. Certain things one should only have to pay for at the time of purchase. (I may not have a rigorous way of defining what these things are, but radio and TV are in that list.) But your reponse to Dale is exactly why I wrote my response to Dale. It's not at all the one-time cost of changing the infrastructure that's the issue here. It is that your recurring ideas are deeply flawed. If the infrastructure has to be changed, it had better be for a better one, not for one that results in recurring problems and high operating and maintenance costs. SFNs are tricky, as soon as you place towers further apart than the echo tolerance allows. It's such a simple stipulation that I don't understand how you keep forgetting that. Want a real-world example? You can use all the fancy models you want, like Longley-Rice, to help locate your towers. But signals from towers that are way too far apart *will* in fact interfere, at least some of the time. Proof? Easy. According to Antennaweb, which uses Longley-Rice, I should barely be able to receive our local DTT stations, let along Baltimore. Yet, I receive some Baltimore stations with greater margin than some local ones. Try that with large-area SFNs creating supposed cookie-cutter patters, where frequency is reused between markets. Recurring interference problems are practically inevitable. Remember: cell phone networks ARE NOT SFNs. Bert ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.