On 1/12/2012 3:48 PM, Dave Barnett wrote:
On 1/11/2012 7:29 PM, SMS wrote:
IBOC is a temporary compromise. Eventually analog will be turned off and
HD Radio will be all digital.

I still haven't heard how you plan to allocate 400 KHz worth of digital
signal into a 200 KHz assigned FM channel. How does that work again?

Dave B.

I think you're well aware of the answer. Not every FM station will be
able to use 400 Khz. Some can have only one sideband at maximum power. A
small percentage can't use either sideband. Life is rough when you're
trying to maximize spectral efficiency.