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[aprssig] Standard 2400 baud AFSK tones?

scott at opentrac.org scott at opentrac.org
Thu Nov 11 06:39:34 UTC 2004


Yeah, I know about those... 2400 baud AFSK seems to be kind of an oddball
mode, and most of what I can find on it suggests that it was mostly a result
of people overclocking regular Bell 202 TNCs based on the TCM3105.  If I
wasn't using it, I'd try it on my KPC-3 for kicks - I've got a few of the
appropriate crystals around.

2400 baud MSK would probably be more useful, and more likely to work over
your average voice radio.  I think some commercial ANI schemes use it, but I
don't have anything on hand that'll decode it.  There's not any particular
requirement for 2400 baud, I'm mostly just curious if it'll work... and if
it's compatible with AGWPE, it'd give folks something else to play with.

Scott
N1VG

-----Original Message-----
From: aprssig-bounces at lists.tapr.org
[mailto:aprssig-bounces at lists.tapr.org]On Behalf Of Rick Green
Sent: Wednesday, November 10, 2004 10:13 PM
To: TAPR APRS Mailing List
Subject: Re: [aprssig] Standard 2400 baud AFSK tones?


On Wed, 10 Nov 2004 scott at opentrac.org wrote:

> What are the standard tones used for 2400 baud AFSK?  I found one
reference
  I don't know of a standard for 2400 baud AFSK.  The 2400 bps modems
that were common on PCs a few years ago were QPSK, not AFSK. (actually
1200 baud)

--
Rick Green

"They that can give up essential liberty to obtain a little
 temporary safety, deserve neither liberty nor safety."
                                  -Benjamin Franklin


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