Subj : Da Di Dit Dit - Rulz
To : STAN PHILLIPS
From : Roy Witt
Date : Sun Aug 27 2000 01:32 am
Hello STAN.
24 Aug 00 21:50, you wrote to me:
RW>> Since marine and aircraft no longer use CW, there's no need for CW
RW>> beacons. I think you'll find that they're all using digital
RW>> communications now. I think it was France who announced back in
RW>> 1998 that the end of that year (or the following February) signaled
RW>> the end of their CW in their maritime service. I believe the
RW>> announcement said that they were the last country to do so.
SP> Perhaps there is no need, however they are there and are still being
SP> used. They may indeed give a digital signal however I have no info on
SP> that, other than the operating frequency is rather low (below 500
SP> Khz) and I would have expected a digital to be heard as well as the
SP> code identification is.
A digital ID is in ASCII code (dual tones as in AX25 mode) on SSB (low
freq) or FM carrier, not CW. If you're hearing morse ID on a CW, then the
beacon is probably an old one which will be replaced someday with new
technology. CW has been phased out of military use and for the most part,
commercial use as well.
RW> SP>> The satelites I am referring to include the commercial
RW> SP>> television satellites. Each transponder has it's own
RW> SP>> identification in code.
RW>>
RW>> In a digital format.
SP> Well, I suppose that normal morse code could be classed as
SP> 'digital'.
Not unless it's dual tone.
RW> SP>> A person who is unable to speak and has only very limited
RW> SP>> movement of their body is able to operate a key with some part
RW> SP>> of their body.
RW>>
RW>> Well, unless they're HAMs, they'll be limited to what we call 'Part
RW>> 15 - no license required' radios.
SP> They are not using radios. They are using normal AF though a
SP> loudspeaker.
SP> Some are now using code to ascii converters as input to a normal
SP> computer.
Then there's no longer a need for the loudspeaker, just a set of
headphones for those who can't type.
... She Said if I didn't get off the radio she'd leave me, OVER!
--- Twit(t) Filter v2.1 (C) 2000
* Origin: KB6PI's Cantina * Santa Ysabel, CA (1:10/22)
