In a message of , Diane Levesque (1:114/270) writes:
 DL>MK>problem would be to get the chip to convert to the right freq tones.
 DL>MK>best way to do it would probably be to use one of those dsp tnc's
 DL>MK>that have programmable mark/space on send and receive. the pk-232
 DL>MK>has adjustable mark space frequencies on the potentiometer but
 DL>MK>i suspect the filters on receive will not work right. will call aea
 DL>MK>if all modes had same mark space freq. i think it would work.
 DL>
 DL>Well, you could do that IF.   However, if the chip does a direct
 DL>translation to milspec, you won't have to even worry about that...and
 DL>even if it doesn't claim to match milspec, there's a better than 
 DL>average chance that the commercial version will work anyway.
An interesting thread!
DSP certainly seems to hold the most promise for decoding digital signals 
from shortwave.  Many of the sound cards used on recent computers are based 
on DSP circuitry and can actually be programmed to decode digital signals.
Converting Baudot to ASCII, decoding packet radio signals, etc. can alse be 
handled by the many embedded controllers now appearing on the market like the 
Basic Stamp.  There's a lot of development activity around these fantastic 
new 'computers on a chip', many of which can be purchased in the 29-99 dollar 
range.
Some good magazines along this line:
NUTS & VOLTS
CIRCUIT CELLAR INK
Electronics Now and Popular Electronics also carry occasional articles about 
using embedded controllers.
Fred.
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