Panoramic view of AO-7 transponder, using FCDP+ for RX and TS-2000 for TX. I got late on he bird after 1/2 pass that started at 18:40 UTC, forgot to swap SDR# IQ in the first moment :( Max elevation was 64deg TX power 5 Watts all the time and RHCP most of the time. About 2 min before end of recording it is possible to hear I think a CU station calling.
https://www.youtube.com/watch?v=jCq0WaEZ9g8&feature=youtu.be
73 Ed PY2RN GG66LW
what are the three hills about? Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 11/24/2015 3:53 PM, Eduardo Erlemann via AMSAT-BB wrote:
Panoramic view of AO-7 transponder, using FCDP+ for RX and TS-2000 for TX. I got late on he bird after 1/2 pass that started at 18:40 UTC, forgot to swap SDR# IQ in the first moment :( Max elevation was 64deg TX power 5 Watts all the time and RHCP most of the time. About 2 min before end of recording it is possible to hear I think a CU station calling.
https://www.youtube.com/watch?v=jCq0WaEZ9g8&feature=youtu.be
73 Ed PY2RN GG66LW _______________________________________________ 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: http://www.amsat.org/mailman/listinfo/amsat-bb
El 24/11/15 a las 23:20, Joe escribió:
what are the three hills about?
That's just noise from the passband of AO-7 transponder. It's stronger in three spots, one on the middle of the passband and two near the edges. These spots are quite strong, in fact comparable to some of the stations. If you look closely, you can also see that these spots get frequency modulated with the strong transmissions.
This is one of those things that it's quite difficult to see on a traditional receiver but it's quite apparent on an SDR waterfall.
73,
Dani M0HXM/EA4GPZ.
Hi,
Yes, there was a CU station there. At 10:27 you can hear me calling :) Hope you can get me calling on our Sked for December!
73 de Pedro CU2ZG
Quoting Daniel Estévez [email protected]:
El 24/11/15 a las 23:20, Joe escribió:
what are the three hills about?
That's just noise from the passband of AO-7 transponder. It's stronger in three spots, one on the middle of the passband and two near the edges. These spots are quite strong, in fact comparable to some of the stations. If you look closely, you can also see that these spots get frequency modulated with the strong transmissions.
This is one of those things that it's quite difficult to see on a traditional receiver but it's quite apparent on an SDR waterfall.
73,
Dani M0HXM/EA4GPZ.
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: http://www.amsat.org/mailman/listinfo/amsat-bb
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Thats pretty cool. Is it a part of the filtering in this old gal, or what causes it?
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 11/25/2015 3:21 AM, Daniel Estévez wrote:
El 24/11/15 a las 23:20, Joe escribió:
what are the three hills about?
That's just noise from the passband of AO-7 transponder. It's stronger in three spots, one on the middle of the passband and two near the edges. These spots are quite strong, in fact comparable to some of the stations. If you look closely, you can also see that these spots get frequency modulated with the strong transmissions.
This is one of those things that it's quite difficult to see on a traditional receiver but it's quite apparent on an SDR waterfall.
73,
Dani M0HXM/EA4GPZ.
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: http://www.amsat.org/mailman/listinfo/amsat-bb
participants (4)
-
Daniel Estévez -
Eduardo Erlemann -
Joe -
pedro＠dutrasousa.name