>Albert E wrote Manfredi, >Take a market area of, say, 80 mile diameter, and only small 1 KW towers to cover it, on one frequency channel. Even with COFDM at 1/4 GI, a passive system won't work (28 mile spacing max). Why would you need lots of 1KW towers to cover a 80 mile area? That's just the wrong way to do it. Take Sydney Australia for example where a single VHF 3.5KW TX giving 50KW ERP on a single tower covers an area this big adequately with 2 small repeaters in a separate UHF SFN. Much cheaper than trying to cover the area with lots of small TX sites In a SFN or an "Earth Scorcher" main UHF TX. ---------------------------------------------------------------------- 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.