FH>In a message of , Diane Levesque (1:114/270) writes:
FH> DL>MK>problem would be to get the chip to convert to the right freq 
ones.
FH> DL>MK>best way to do it would probably be to use one of those dsp tnc's
FH> DL>MK>that have programmable mark/space on send and receive. the pk-232
FH> DL>MK>has adjustable mark space frequencies on the potentiometer but
FH> DL>MK>i suspect the filters on receive will not work right. will call aea
FH> DL>MK>if all modes had same mark space freq. i think it would work.
FH> DL>
FH> DL>Well, you could do that IF.   However, if the chip does a direct
FH> DL>translation to milspec, you won't have to even worry about that...and
FH> DL>even if it doesn't claim to match milspec, there's a better than
FH> DL>average chance that the commercial version will work anyway.
FH>An interesting thread!
:)
FH>DSP certainly seems to hold the most promise for decoding digital signals
FH>from shortwave.  Many of the sound cards used on recent computers are 
sed
Uhhhh, we're not talking about that kind of communication, Fred...we're
talking about the type of communication that machines use to control the
machines that communicate like that.  The RS232 and ilk are serial port
communications (audio) standards like what goes in and out of your
computer's various COM ports...yeah, you have one what talks to your
telephone modem, which takes the RS232 data and modulates telephone
transmission fqy's for tranmission on the telephone wire; the high-end
SW receivers have such (audio, no phone fqy mod) serial ports for hookup
to a pooter.
Well, there's this here other standard for serial communication that is
not so common, and that's the one we're talking about for conversion to
the widely-used RS232 COM port standard, possibly for use as a high-end
SW rig controller--and yes, it IS possible even if the oddball gizmo is
a military thingie.     ;)
FH>on DSP circuitry and can actually be programmed to decode digital signals.
...so you see, you n me are talking apples and oranges at this point...
FH>Converting Baudot to ASCII, decoding packet radio signals, etc. can alse 
e
FH>handled by the many embedded controllers now appearing on the market like
FH>the Basic Stamp.  There's a lot of development activity around these
FH>fantastic new 'computers on a chip', many of which can be purchased in the
FH>29-99 dollar range.
No argument on that from this quarter.   :)
FH>Some good magazines along this line:
FH>NUTS & VOLTS           <<== I'm familiar with this-un.  It is good.
FH>CIRCUIT CELLAR INK
FH>Electronics Now and Popular Electronics also carry occasional articles
FH>about using embedded controllers.
Yup!  :)
 * SLMR 2.1a * Electronics: the art of keeping the smoke IN the wires.
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