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Re: Can LINUX soundmodem do PSK1200?



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.
> 
> -- 
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> 

-- 
Bob Nielsen                 Internet: nielsen@primenet.com
Tucson, AZ                  AMPRnet:  w6swe@w6swe.ampr.org
DM42nh                      http://www.primenet.com/~nielsen
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