[sarex] Re: Computer control of ICOM 1271A?

[Greg D.]

Hi Iain,

Well, that's the puzzle.  I thought "all" ICOM rigs did CI-something, but the user guide never mentions it, and there's no so-marked connector on the back of the rig.  The only thing close is an "Accessory Socket", but it only does stuff like squelch output, PTT switch, fixed AF output, ALC voltage, and some other analog stuff.  Nothing related to the frequency setting.  

Is there another connector (internal, perhaps?) which gives access to the digital settings?

Greg  KO6TH


> Date: Sun, 21 Dec 2008 21:37:54 +0000
> From: g7iii at g7iii.net
> To: ko6th_greg at hotmail.com
> CC: sarex at AMSAT.Org
> Subject: Re: [sarex]  Computer control of ICOM 1271A?
> 
> Sorry for the slow response, but:
> 
> Greg D. wrote:
> > Hi folks,
> > 
> > I'm pretty sure the answer is no, but I'll ask anyway...
> > 
> > Has anyone succeeded in interfacing an ICOM 1271A 23cm transceiver to a computer for Doppler control?  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.
> 
> IIRC the Icom *71 series used the CI-IV interface (Later models such as
> the 75 series used the more well known CI-V interface)
> 
> CI-IV was a parallel interface, and Icom did do a (probably expensive)
> CI-IV to CI-V converter, which was probably not much more than a TTL
> Parallel-Serial converter
> 
> Since I know the CI-V interface is so well documented, hopefully the
> CI-IV was as well (was before my time...)
> 
> 
> 73s
> 
> Iain

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