[amsat-bb] Tuning HuskySat-1 telemetry signal

[Burns Fisher]

I'm finding the opposite of Mark.  Costas works much better for me than Dot
Product on FoxTelem when using a FunCubeDongle Pro Plus and IQ input.  Yes,
the DP "eye" looks more like a triangle, and for Costas it is closer to
what you see on the FM satellites, but not exactly.

On Sun, Feb 2, 2020 at 3:32 PM JoAnne K9JKM via AMSAT-BB <amsat-bb at amsat.org>
wrote:

> I'm using an SDRPlay RSP2 and SDRuno software to receive HuskySat here.
> Antenna is a 7 element yagi fixed elevation on a TV rotor for azimuth.
> This contraption is running on manual doppler tracking ... man does that
> move fast ;-)
>
> I seem to see about equal number of decodes between Costas and DP as
> long as I track the tuning accurately enough. Thanks for pointing out
> the different display between the two decoders. I thought I wasn't
> tuning correctly when I first saw the different eye.
>
> This is just me ... but when using Costas it seems I'm closer in tuning
> as long as I can maintain a steady eyeball. For the DP decoder I'm
> appearing to get better decodes when I keep the phasor display as steady
> as possible.
>
>
> On 2/2/2020 1:18 PM, Mark L. Hammond via AMSAT-BB wrote:
> > Mine looks the same--using dot product (DP) decoder as well.  The eye
> looks prettier on Costas, but here copy isn't quite as good as the DP.
> >
> > Using object "G" my recent 86 deg pass was fully automated!  Carrier
> ranged from like 1460 up to 1600 back down to 1450 ish again....super nice.
> >
> > For IC-9700 users--AF over USB works fine, as does  AF out of ACC 1 jack
> on rear, as does AF out of Main EXT-SP jack on rear.  (Not having much luck
> using IQ for now...)
> >
> > Mark N8MH
> >
> >
> > At 01:54 PM 2/2/2020 -0500, Roy Dean via AMSAT-BB wrote:
> >> Since I can't post a picture to the group, I've started a QRZ thread:
> >>
> >>
> https://forums.qrz.com/index.php?threads/huskysat-1-and-foxtelem.690761/
> >>
> >> I'm getting good decodes, but my eye diagram looks more like a teardrop
> >> than an "eye".   Any suggestions?
> >>
> >> --Roy
> >> K3RLD
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> > to all interested persons worldwide without requiring membership.
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> --
> 73 de JoAnne K9JKM
> joanne.k9jkm at gmail.com
>
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
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>