>> They are? DSL certainly isn't (the baseband there is the audio >> range, which DSL specifically avoids) and, > My definition of "broadband" is "multiple communication channels > sharing bandwidth on the same medium", which does not, IMO, describe > DSL. What is yours?
The one from which my remarks were derived came from googling and reading three or four pages which gave definitions, such as http://en.wikipedia.org/wiki/Baseband and http://en.wikipedia.org/wiki/Broadband. It is that baseband uses the frequency range whose low-frequency end is at 0Hz; broadband avoids this, with its low-frequency cutoff well above that. As the "Broadband" wikipedia page points out, the term can also refer to any signal whose bandwidth is wide compared to something else, but that's not a very useful definition in this context, as there is no obvious "something else" to compare to. Actually, channels sharing bandwidth can happen on baseband or broadband, via either TDM or FDM (though whether FDM is baseband depends on your point of view; an FDM-shared medium is not baseband for more than one of the signals making it up, though if you think of them as aggregated then the term may be fair). /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML [email protected] / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
