On Sep 12, 11:43*am, Richard Evans
wrote:
hwh wrote:
On 9/12/10 7:51 PM, dave wrote:
Richard Evans wrote:

As for digital radio, unless they launch using something that is
actually better than FM, then we are better off sticking with FM. What
is frustrating, is that they could quite easily come up with a system
that would wipe the floor with FM, but for one reason or another it just
hasn't been done.

Richard E.

A system like Sirius or XM can get 60 good sounding stereo channels in
4.5 MHz of spectrum

So obviously either they use more channels or they have less bandwidth
than that, because these sat systems are not good sounding ones.

I was wondering about this.

Could 60 channels in 4.5 Mhz of spectrum produce good sound quality?
Not sure, but thinking about it, it sounds unlikely.

Do they actually do this (providing 60 good sounding channels)?
I seriously doubt it.

Richard E.

Doing-the-Math : 4,500 kHz / 60 = 270 kHz per Channel
* Presently AM/MW is 10 kHz per Channel
* Presently FM is 200 kHz per Channel

? So Why Won't 270 kHz per Channel Work
for Digital Radio Broadcasting Formats ?

~ RHF