[RTTY] AFSK to FSK converter

[Kok Chen]

On Sep 17, 2012, at 12:09 PM, Joe Subich, W4TV wrote:

>  If the software author insists on "all AFC, all
> the time" then Bill's dilemma is essentially unsolvable.

Joe, it is actually solvable if you can modify the program to put out only an on-off keyed tone instead of an AFSK tone -- i.e., either shut the transmit mark tone off, or shut the transmit space tone off.   Then use an OOK decoder like the USB Interface III to turn it into an FSK keying signal.

There is also another way around the "AFC problem": instantiate two copies of the software modem.  Use one modem for transmit and the other for receive.

73
Chen, W7AY