Hey, Bert Manfredi wrote: Ø To be clear, of the successful SFNs we have looked into on this list, i.e. Paris, Berlin, Rome, and Sydney, and maybe even the one in NYC if it exists today, do any of these NOT involve at least one big stick? And that one assisted by one or a half-handful of smaller sticks? Scusa ? Speaking on behalf of this little country below the sea level, we have only one big stick, the Gerbrandy tower in Lopik: http://nl.wikipedia.org/wiki/Gerbrandytoren and since the introduction of DVB-T it is only 367 meters high anymore. Nederland is flat, so it has a long reach. But if you look at the frequency plan, it emits only a lousy 10 kW in bouquet 1, which is where the 3+1 free-to-air public channels are located. See: http://nl.wikipedia.org/wiki/DVB-T-frequenties . Many of the lower towers emit higher power, up to 40 kW. Bouquet 1 contains one regional program, so I suppose that this means that it can not be a SFN for the entire country. The other 3 bouquets contain the same programs for the entire country. I am not sure why this is not a complete SFN then, only partially, but this may well have to do with available frequencies in relation to the neighboring countries Belgium and Germany. The precise frequency allocation and power figures can be viewed at: http://www.at-ez.nl/dav/index.html (= official data). You can see how many (44 !) little transmitters there are everywhere, in such a small country. And all these transmitters are managed by a single entity (Novec, with KPN ?). Note that every stick broadcasts the same 22 programs, only the 1 regional program may differ. So there is NO need to aim an antenna at 2 or more transmitter ! These do not include any German channels, so very few people would point an antenna towards Germany. If you're really into foreign programs, you already have a satellite receiver. The coverage is optimized for the densely populated urban areas, e.g. east and west of Eindhoven there are 2 transmitters of 10 kW each, using the same frequencies (SFN). The intention is to use small active set-top (indoor) antennas, which come with the tuner. There are complaints from the neigborhood around the west-side tower about strong interference into the cable TV network, which uses the same frequencies for some popular analog channels. Apparently, a 10 kW tower in your backyard is a problem ! KPN/Digitenne is not trying too hard to achieve 100% coverage. The people who live in the rural areas are kindly referred to CanalDigitaal, where they can get the same 22 programs (and many many more) over satellite (Astra at 19.2 and 23.5 degrees East). A little satellite beats a big stick any time. Their bit-rates are somewhat higher too. And I receive both (DVB-T and DVB-S) plus analog cable (but not DVB-C). DVB-S for the HDTV channels (1 already, soon 3, plus some foreign programs), and DVB-T for receiving anything at all during heavy rain or snow, and because a DVB-T / DVB-C tuner and demodulator is now standard in every new TV, so it's also a case of why-not. Groeten, -- Jeroen Jeroen H. Stessen Specialist Picture Quality Philips Consumer Lifestyle Advanced Technology (Eindhoven) High Tech Campus 37 - room 8.042 5656 AE Eindhoven - Nederland ________________________________ The information contained in this message may be confidential and legally protected under applicable law. The message is intended solely for the addressee(s). If you are not the intended recipient, you are hereby notified that any use, forwarding, dissemination, or reproduction of this message is strictly prohibited and may be unlawful. If you are not the intended recipient, please contact the sender by return e-mail and destroy all copies of the original message.