John Shutt wrote: > Last time I looked, I'm in Lansing, Michigan, not > Europe (although...) Perhaps. But with the C/N monitor in my STBs, I can tell you that achieving 25 dB is not child's play. At least, not if you aren't inside city limits. Only the stronger stations meet or beat those levels, where I live. (I'm not saying they're all 1 MW stations, though. Most are not, as far as I know anyway.) > All of the stations in town have plenty of signal > in their city grade contours, and we are running > much higher ERPs than Europe. One VHF in town is > running 1 MW ERP on UHF 59. > > What C/N is your magical theoretical future ATSC > receiver going to need to equalize mobile dynamic > mutipath? The way to make both DVB-T and ATSC work for mobile sets, at least as well as analog TV mobile sets, is going to be the same. Just like the Chinese are doing, just like STMicroelectronics is doing, they start using good equalizers even for COFDM. *If* the equalizers do their job "perfectly," whatever marginal C/N you get with a multicarrier, multi-pilot scheme will be beat by a single carrier scheme, at a given b/s/Hz. 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.