[amsat-bb] SatPC32: How to change a K3 to DATA mode for PSAT-1 ?

Robert Bruninga bruninga at usna.edu
Sat Nov 7 15:01:32 UTC 2015

There is no need for doppler rig control for PSK31 on PSAT.  In fact, it
wont work because doppler correction has to be phase coherent and you
cannot do that by rig control.

Better to just run constant frequency around 28.121 MHz.

But the best way is to run Andy's uplink-only program written for PSAT so
that it pre-compensates for doppler at the audio level and also lets you
run full duplex from your regular PSK31 program.



On Sat, Nov 7, 2015 at 7:37 AM, Bob KD7YZ <kd7yz at denstarfarm.us> wrote:

> I have been trying to lash-up everything for ops on 28.120 (USB) PSK31
> Uplink and 435.350 (FM) Downlink for PSAT-1 .
> Well, in order for my K# to be keyed by the soundcard SIGNALINK-USB, the
> K3 must be in DATA mode ("MD6;" is the K3's command I believe).
> I have moderate success telling SatPC32 that the 2nd radio is a Kenwood,
> other .
> So when SatPC32 reads the Doppler.sqf file, it will change my K3 to CW
> or to FM or USB. None of which, if used, will allow MixW or DopplerPSK
> to do anything more than "switch" on the SignaLink and also cause the K3
> so "switch" to the xmit (red lite on) position. Yet there is, as
> expected, no RF output that way, in USB.
> So using two different SignaLink's I have the IC910H going to the 435 rx
> freq and listening. I have the K3 on another SignaLink, going to 28.120
> and switching to xmit when asked.
> Just that I need to K3 to automatically go into DATA mode when being
> used for PSAT-1, or any other PSK type bird.
> When I manually switch the K3, then either MixW or DopplerPSK do, in
> fact, switch the K3 to xmit as-well-as output RF .
> This is not a very good solution as sometimes SatPC32 re-reads
> Doppler.sqf and thus puts K3 back to USB.
> Anyone have a solution?
> tnx !
> --
> 73,
> Bob KD7YZ
> www.qrz.com/db/kd7yz
> AmSat LM#901
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