[OZAPRS] Decoding HF APRS

[Richard Hoskin]

Something like this is commercially available at 
http://www.scs-ptc.com/datasheets/scs_tracker_dsp_tnc_en_v5.pdf
The TNC will automatically decode ax25 at +/- 400Hz

But is costs an arm and a leg.

It would be great to see a sound card version of the same thing.

Cheers
Richard
VK3JFK

> -----Original Message-----
> From: ozaprs-bounces at aprs.net.au [mailto:ozaprs-bounces at aprs.net.au] On
> Behalf Of Hamish Moffatt
> Sent: Friday, 7 July 2006 2:00 PM
> To: ozaprs at aprs.net.au
> Subject: Re: [OZAPRS] Decoding HF APRS
> 
> On Fri, Jul 07, 2006 at 02:47:12PM +1200, G T & C A Beagley wrote:
> > I have similar problems. I regularly decode VK3MY and a couple of
other
> > VKs plus a W1 on my AEA DSP-2232 and although I can hear a lot more
> > stations in there they rarely seem to decode even when signals are
> > respectable. I have found tuning on HF to be extremely critical. About
> > 20hz either way can make a big difference.
> 
> This sounds like somewhere a software modem could excel - auto-frequency
> correction (AFC), parallel demodulators on adjacent frequencies with
> voting etc.
> 
> 
> Hamish
> --
> Hamish Moffatt VK3SB <hamish at debian.org> <hamish at cloud.net.au>
> _______________________________________________
> Ozaprs mailing list
> Ozaprs at aprs.net.au
> http://aprs.net.au/mailman/listinfo/ozaprs

_______________________________________________
Ozaprs mailing list
Ozaprs at aprs.net.au
http://aprs.net.au/mailman/listinfo/ozaprs
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://second.aprs.net.au/pipermail/ozaprs/attachments/20060709/63450373/attachment.htm