[GreenKeys] Thanks for ITTY

[Duncan Brown]

On 2/20/2019 09:43, Paul Wills (CKT&T) wrote:
> Speaking of which;
>
> Is there a way to send ITTY directly to a properly configured serial 
> port?  Right now, I'm using Heavy Metal to drive my equipment but ITTY 
> would certainly provide some extra "food" for the Teletypes to digest.
>
> PDW

Paul,

ITTY is a frequency shifted audio  (AFSK) signal like you would have 
heard over the radio.  The AFSK signal must be converted to a Mark-Space 
DC signal in a AFSK "converter" or "Terminal unit" such as manufactured 
by HAL or Dovetron.

If you want to do the full conversion within you computer, you need a 
program like MMTTY ( https://hamsoft.ca/ ) to do the decoding and then 
its companion program EXTFSK ( 
https://hamsoft.ca/pages/mmtty/ext-fsk.php ) to drive a serial port.

Have fun,

Duncan
K2OEQ


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