[aprssig] I'm brainstorming, so don't beat me up!
archer at eskimo.com
Thu Jul 7 12:02:46 CDT 2005
On Thu, 7 Jul 2005, Earl Needham wrote:
> At 10:40 AM 7/7/2005, Curt, WE7U wrote:
> >While we're at it, would some other non-standard rate _between_ 4800
> >and 9600 work? What is the maximum rate we could get through
> >voice-grade rigs without modification, even if we have to change to
> >a different type of modulation?
> If we're going to consider another form of modulation, I'd like to
> enter my vote for 100 WPM (or faster) CW. Maybe a LOT faster -- can we
> design a system that does 1200 WPM CW?
That's extremely fast! What you're describing is (assuming 5-char
words and a space between each one) 6 * 1200 chars per second, or 6
* 1200 * 8 bits per second.
I assume you mean something equivalent to 1200 baud packet speed in
terms of characters transferred. That's 1200 bits per second.
I don't know whether a CW system could be designed that would
compete with 1200 baud AX.25 packet. There must be a good reason
that people went with the 2-tone modem originally. Perhaps coherent
CW would suffice for this idea, which I think is a two-tone modem
anyway isn't it?
Curt, WE7U. APRS Client Comparisons: http://www.eskimo.com/~archer
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