On 17/11/2010 00:12, William "Chops" Westfield wrote:
>> 9600 baud FSK modem IC?
>>
> So *what* are we talking about here?
>
> AFAIK, a 9600bps FSK modem over normal phone lines is impossible.  The
> 9600bps modems used much more exotic modulation schemes (as is being
> discussed.)  IIRC, regular FSK topped out at about 700bps, and all
> modems 1200bps and faster are more exotic...
>
> But that doesn't mean you couldn't have a 9600bps FSK modem over a
> link with inherently higher bandwidth than a phone line (say, a radio
> link.)
>
> Was the original poster looking for a 9600bps FSK modem, or a 9600bps
> phone-line modem?
>
> BillW
>
This was what I wondered. As 1200 bps down and 75bps up is fastest FSK I=20
ever saw!

Typically FSK at 9600bps would want 40KHz or more. PSK is near 20kHz.
--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.