I appreciate that but people think in modes of FM and AM thus the 2 different 
Iboc systems on the different frequency ranges.


On 26/11/2011, at 9:36 PM, Gordon Smith wrote:

> Hi Dane
> 
> I just want to make a couple of comments here.
> 
> On 26 Nov 2011, at 09:18, Dane trethowan wrote:
> 
> Dane said:
> 
> As I understand it in the U.S., they run 2 different versions of Iboc or as 
> they call it HD Radio? 1 on the FM band and 1 on the AM band.
> 
> Gordon said:
> 
> There's no such thing as an "AM" or "FM" band. Am, (Amplitude modulation) and 
> "FM", (frequency modulation) can be used anywhere. They are classes of 
> emission and not frequency specific modes of transmission. I'm sure you know 
> that; but I wanted it to be clear for the benefit of any possible readers who 
> do not.
> 
> Gordon
> 
> 
> 
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