Re: [amsat-bb] Tuning HuskySat-1 telemetry signal
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 _______________________________________________ Sent via [email protected]. 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! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
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 _______________________________________________ Sent via [email protected]. 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! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
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 [email protected] 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 _______________________________________________ Sent via [email protected]. 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!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. 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!
Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
-- 73 de JoAnne K9JKM [email protected]
Sent via [email protected]. 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! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
participants (3)
-
Burns Fisher -
JoAnne K9JKM -
Mark L. Hammond