Tony Calguire wrote:
It sure is a shame they didn't go through with their original plan. I
would have liked to have seen channels 2-6, or at least channels 5 and
6, given over to the FM broadcast band. Just think of how IBOC and LPFM
might have worked out if the FM band had a little room to expand!

That's an interesting question: could two TV channels worth of spectrum
(12MHz) provide enough room to give each analog FM BC station a digital
counterpart without using IBOC?

Since IBOC-AM seems to (more-or-less?!) work within 15KHz or so of
bandwidth, it would seem a functional system with adequate quality to
replace FM could be made to work with 120KHz available to each station.

But the FCC had a hard enough time fitting the DTV assignments into the
channels they have. Even dropping one or two might prove a serious
problem...
--
Doug Smith W9WI
Pleasant View (Nashville), TN EM66
http://www.w9wi.com