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Re: Computer control of ICOM 1271A?




Hi Thomas,

Ok, that's what I figured.  Time to break out the C compiler and figure out how to twiddle the modem lines.  Good to know that it can be done.

Thanks,

Greg  KO6TH


> Date: Fri, 19 Dec 2008 19:53:36 +0100
> From: th.frey@vtxmail.ch
> To: sarex@AMSAT.Org
> Subject: [sarex] Re: Computer control of ICOM 1271A?
> 
> Greg D. schrieb:
> > Hi folks,
> >
> > I'm pretty sure the answer is no, but I'll ask anyway...
> >   
> 
> Hi Greg
> 
> > Has anyone succeeded in interfacing an ICOM 1271A 23cm transceiver to a computer for Doppler control?
> 
> Yes, an 1271E TRX ...
> 
> >   In preparation for the ISS L-band uplink, I maybe have barely enough uplink power to get in, but it will need to be right at mid-point on an overhead pass.  That's when Doppler shift is the worst.
> >
> > I have been able to keep up with Doppler on AO-51 L/U by hand (while watching the computer prediction screen), so direct computer control isn't critical, but it seems like a good next step in station automation, if it's possible.  The only interface I can imagine is to simulate mike up/down clicks through a parallel port.  I am currently running a home-brew client for Predict under Linux, which spits out CAT strings to my Yaesu 736R via a serial port.  So, mike-clicks will be a good bit of a re-write.
> >   
> 
> ... via "mike-click"-interface at the serial port. In between I have
> a serial switchbox to switch between CAT (Kenwood TS-711E) and the
> "mike-click"-interface. To receive in 70cm I have another serial port,
> totally 4.
> 
> > I guess the only other alternative is some sort of swap of 1271 for a 23cm Yaesu module...  Any takers (or is this a bad idea)?
> >   
> 
> Try also with switchboxes, USB-to-serial interfaces, serialport-card,
> and so on. But look, if the hardware will be supportet from the
> software.
> 
> 
> > Greg  KO6TH
> >
> >
> >   
> 
> 
> Mit freundlichen Grüssen, Regards, 73
>     Thomas Frey, HB9SKA
> ______________________________________________________________________
> 
>   Thomas Frey, Holzgasse 2, CH-5242 Birr, Tel. + Fax: 056 444 93 41
>                    http://home.datacomm.ch/th.frey/
> 
> 
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