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[aprssig] Re: APRS for a near-Arctic hot-air balloon flight -- TinyTralk and OpenTrak 300 baud mode

scott at opentrac.org scott at opentrac.org
Wed Dec 7 01:54:18 UTC 2005


I don't see why not.  This is for SSB operation, right?  I'd need a
reference with the relevant specs, and most importantly something to test it
with.  Does AGWPE handle this mode, or do any of the other soundcard modem
programs?

Scott
N1VG

> -----Original Message-----
> From: Ryan Butler [mailto:rbutler at tsss.org] 
> Sent: Tuesday, December 06, 2005 5:43 PM
> To: TAPR APRS Mailing List; scott at opentrac.org
> Cc: 'TAPR APRS Mailing List'
> Subject: RE: [aprssig] Re: APRS for a near-Arctic hot-air 
> balloon flight -- TinyTralk and OpenTrak 300 baud mode
> 
> Scott,
> 
> Is there a possibility of a Manchester encoded FSK firmware for use 
> with digipeating satellites like AO-16?
> 
> Ryan, KB0JQO
> 
> 
> Quoting scott at opentrac.org:
> 
> >> The OpenTrack requires downloading an entirely different set
> >> of firmware into the processor; i.e. not something you will
> >> do in the field.
> >
> > That's true.  If there's sufficient interest, I could 
> change that.  It's
> > just a few constants that get changed, but the loop that 
> references them is
> > very timing critical and I didn't feel like messing with it 
> and using up
> > more config space.
> >
> > I actually cranked it up to 2400 baud once, but couldn't 
> get AGWPE to copy
> > it.  Not sure if that was because it wasn't modulating 
> properly, or if I
> > didn't have the right tones - I think George wasn't even 
> sure what tones it
> > needed, or if it had been tested.
> >
> > I'm thinking about trying out 600 baud, with convolutional 
> coding and a
> > non-AX.25 frame format... just curious how much the 
> performance can be
> > improved for a noisy channel.
> >
> > Scott
> > N1VG
> >
> >
> >
> >
> > _______________________________________________
> > aprssig mailing list
> > aprssig at lists.tapr.org
> > https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
> >
> 
> 
> 
> 







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