Re: [amsat-bb] AO-40 Receive and FT-847 serial control

[Jim Sanford <wb4gcs@xxxxxxxxx>]

Best way to do this is with a step up and step down.  I don't know if
the -847 has such a CAT command or not.  IF not, perhaps it could be
implemented in hardware, ie 2 bits of the parallell port going to step
up and down inputs on the mic connector or on the back.

I've done this with the 9k6 birds allowing full hands off automation. 
(Using ICOM radios, tho also implemented for an FT-736.)

Admittedly, using the discriminator output in the FM decoder is much
easier than modifying the AO-40 RCV software, but if it already does
some checking to provide an output based on frequency, I'd THINK that it
wouldn't be too hard to add output options to that function.

My $.02, for what it's worth.

(I'll be looking to do something similar for my dedicated telemetry
receiver, an old Radio Shack 10m rig.)

Good luck!

73,
Jim
wb4gcs@amsat.org


Ed Evitt wrote:
> 
> I would like to have the telemetry capture of AO-40 a little more automated.
> I have to bump the frequency dial, every now and then, on the FT-847 to keep
> the telemetry in the window of AO-40 Receive while I am capturing telemetry
> frames. When I leave the computer there is a time I miss some telemetry. I
> use ITune to correct the radio for Doppler, but the TS-3373 has a tendency
> to drift despite the insulation wrap. It sure would be nice to be able to
> use the tuning feature of AO-40 Receive to take over the frequency
> correction of the radio. Has anyone figured out the serial commands in the
> Rig Frequency Control menu of AO-40 Receive to correct the frequency of the
> FT-847? It appears the CAT control and VFO frequency could be set via the
> serial connection. I could find no refrence of a command to step up and
> down, or am I missing something?  I wanted to post to the list before I try
> other alternatives in hope someone has already solved my problem.
> Ed Evitt, N9AWP
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