[aprssig] Fill-in Digis

[Andre PE1RDW]

Robert Bruninga schreef:

>I would assume that all schemes wait until end
>of DCD and DCD works on valid bytes, not just
>flag bytes...  So there should be no key up until
>actual end of packet (even with multiple frames).
>Bob
>  
>
A true DCD detect tones not bytes, we are talking level 1 here, bytes 
have no meaning, that is level 2.
Some DCDs might detect any tone others detect 1200 and 2200 Hz (in case 
of 1200 baud afsk).

73 de Andre PE1RDW