Re: [amsat-bb] Can LINUX soundmodem do PSK1200?
Hi!
Thomas also has an usermode soundmodem implementation under construction
that should make adding or modifying a new modulation easier (to debug at
least, no kernel crashes...). The core handles all the KISS and HDLC stuff
etc. I have implemented a NEWQPSK modem (that multitone modem from Pawel
Jalocha, originally for the EVM56K) on that platform.
Unfortunately Thomas has been very busy lately so I don't know what the
situation is with the usersoundmodem code. When I did the NEWQPSK
implementation, it wasn't ready enough to be released to the public.
On Mon, 6 Sep 1999, Bob Nielsen wrote:
> It would require 1200 baud Manchester-encoded AFSK for the uplink and
> 1200 baud PSK for the downlink. I would think the existing
> sm_afsk1200.c and sm_psk4800.c drivers in the Linux kernel could
> possibly be hacked to provide this without too much effort. John, you
> might contact Tom Sailer (sailer@ife.ee.ethz.ch), the author of the
> soundmodem drivers, about this.
>
> Bob, W6SWE
>
> On Tue, Sep 07, 1999 at 11:19:06AM +1000, Hamish Moffatt wrote:
> > On Mon, Sep 06, 1999 at 09:10:44PM -0400, Bob Bruninga wrote:
> > > On Mon, 6 Sep 1999, John Mock wrote:
> > >
> > > > People have expressed interest in APRS and/or digipeating through 1200 bps
> > > > packet satellites. Can 'soundmodem' decode this? If not, what would it
> > > > take to make this work?
> > >
> > > Actually, Peter Martinez, Author of the very popular PSK31 sound card
> > > program has become interested. He seems willing to do the PSK modem part
> > > if we can hook him up with someone who has already done all the AX.25 TNC
> > > emulator code...
> > >
> > > Can anyone help us?
> >
> > Unfortunately this will give us a different result. Linux just needs
> > the actual modem code; the soundmodem driver already has a few different
> > modulations (AFSK 1200, 2400, HAPN 4800, G3RUH FSK 9600), so with
> > a compatible interface it should integrate very easily.
> >
> >
> > Hamish
> > --
> > Hamish Moffatt VK3SB (ex-VK3TYD).
> > CCs of replies from mailing lists are welcome.
> >
> > --
> > Unsubscribe? mail -s unsubscribe debian-hams-request@lists.debian.org < /dev/null
--
--- Tomi Manninen / Tomi.Manninen@hut.fi / OH2BNS @ OH2RBI.FIN.EU ---
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