[amsat-bb] Re: SatPC32 Help Needed

David Palmer dave at zdap.com
Wed Oct 6 12:35:34 PDT 2010

Hi Guy and Amsat-List!

I'd like to know the answer to this too!  I just recently started
using twin FT-817ND's and SatPC32 as well, and notice the exact same
thing -- audio drifts slightly thorughout the pass, even though I have
the dopper correction set pretty close.  For me, it only drifts a few
hundred Hz at most, but it's still enough that I have to tweak the
offset on the uplink.  I'm new to SSB sats so not sure as well if
there's something I'm doing wrong.  I've got the time on the PC clock
set within 1 second, and my lat/long within 0.01 degrees.

I'm measuring the drift just roughly based on my own audio coming back
over the downlink -- unfortunately as I've called CQ on FO-29 and
VO-52 the last few evening's passes (0100-0500 UTC), no one else has
been on the sats for a direct QSO!  My own audio comes back nice and
clear (even out to 5 degrees elevation) so it's not a reception
problem, as far as I know.

Any help for those of us new to the satellites would be appreciated!


Dave KB5WIA CM88 Northern California
2xFT817-ND, Elk Log-Periodic, MH-72 Duplexer, Samsung Netbook running SatPC32.

> Is anyone else using two Yaesu FT-817
> / 857 / 897 rigs with SatPC32?  If so, what do you think I am doing wrong
> and what are your DOPPLER.SQF data lines for AO-7, VO-52, and FO-29 (as well
> as any other critical settings)?

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