Re: PSK baud rates on HF

"Paul Keinanen" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> On Fri, 28 Nov 2003 03:26:01 GMT, "charlesb" <[EMAIL PROTECTED]>
> wrote:
>
> >Recently I have heard references from multiple sources about 9.6kb PSK
> >activity on HF bands.
>
> I assume this refers to 9600 bit/s.
>
> >
> >What's the deal on this? Is it a wide, multi-stream mode like Q15x25
mode?
> >
> >It sounds illegal, but lots of things sound illegal if you are not
familiar
> >with the facts. That's me...
>
> A 9600 bit/s QPSK signal fits nicely within the same bandwidth
> occupied by an AM phone transmission, with 8PSK (or 8QAM) the signal
> would fit into the bandwidth of SSB phone transmissions. If the
> bandwidth limit allows AM or SSB, then what is the problem with other
> modes with similar bandwidths ?
>

Well except that for standard PSK enthusiasts tout it's exceptionally narrow
bandwidth thus allowing more conversations in a given space than even CW.
What point is there in creating a wide digital mode?

Dee D. Flint, N8UZE