[OZAPRS] RE: [aprssig] DTMF Weather telemetry

[Andrew Rich]

I bought a TNC :-)


> I think you're right.  40 ms per character and 40 ms dead time, so 80 
ms per
> character total, with 4 bits per character - that's 50 bits per 
second.  Not
> really enough to give you a full high-resolution fix each second.
> 
> Scott
> N1VG
> ----- Original Message ----- 
> From: "Robert Bruninga" <bruninga at usna.edu>
> To: <scott at 3xf.com>; <vk4tec at hotmail.com>; <aprssig at lists.tapr.org>
> Cc: <ozaprs at marconi.ics.mq.edu.au>
> Sent: Friday, August 20, 2004 7:40 AM
> Subject: [OZAPRS] RE: [aprssig] DTMF Weather telemetry
> 
> 
> > I think the TTone spec requires dead time between
> > each character even if it is different.  That is part
> > of the high reliability detection scheme... I think... Bob
> >
> 
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> 

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