Hi,

Further - the RTTY code is asynchronous where the stop bit may
be any length over the standard 1.42 or 1.5 bit minimum. It is
therefore almost standard practice to pass the key-strokes into a
buffer and to output them from there so that the final result is
almost synchronous. If this buffer should be emptied then some
neutral character such as a 'letters shift' is continually output
(called I think, 'diddling') to keep the circuit alive and to
remove any DC component caused by a constant mark during 'hunt
and peck' keying.

Don't forget to include the other common commercial standard
of a 20ms bit-size (50 baud) in your program.


Cheers - Joe