Re: [Tlf-devel] MMTTY plugin for TLF?

[Thomas Beierlein]

Am Mon, 10 Oct 2011 02:21:15 +0000 (GMT)
schrieb address@hidden:

> 
> On Oct 9, 2011, Martin Kratoska <address@hidden> wrote: 
> 
> >BTW a true FSK is a must for RTTY, AFSK or several pseudoFSK options
> >are rather annoying. The same was with Windoze until JE3HHT created
> >MMTTY. My suggestion is to search for a keen programmer who will be 
> >able/willing to solve the FSK timing issues and create a true FSK 
> >program for Linux.

One field to look into is a realtime linux system. But I do not know if
that is enough.

> 
> I am absolutely NOT that keen programmer(grin)...
> 
> I wonder, might the answer be some kind of external hardware device?
> I'm thinking "Winkey for FSK", possibly implemented on Arduino
> hardware. 

Sure that is one possible solution.

One drawback of most existing external devices is that they miss some
kind of feedback about progress in sending. With that the idea sounds
interesting.


> Actually, wouldn't that be fairly simple, since the
> external device doesn't have to worry about receiving?  (that can be
> done in DSP on the Linux host)  You'd just feed ASCII characters to
> the external hardware over a RS-232 or USB port; the hardware (OK,
> firmware) would map to Baudot & shift a digital output port up & down
> with appropriate timing.
> 
> 
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