Re: [amsat-bb] AO-7 transponder pan view
I think it is caused due the components age/conditions which is affecting its receiver linearity, noticed even in a such narrow band.
73s
Ed PY2RN GG66LW -------------------------------------------- On Wed, 11/25/15, Joe [email protected] wrote:
Subject: Re: [amsat-bb] AO-7 transponder pan view To: [email protected] Date: Wednesday, November 25, 2015, 12:08 PM
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.
_______________________________________________
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_______________________________________________ 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
So, For best results you want to place your signal in the valleys true?
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 11/25/2015 8:52 AM, Eduardo Erlemann wrote:
I think it is caused due the components age/conditions which is affecting its receiver linearity, noticed even in a such narrow band.
73s
Ed PY2RN GG66LW
On Wed, 11/25/15, Joe [email protected] wrote:
Subject: Re: [amsat-bb] AO-7 transponder pan view To: [email protected] Date: Wednesday, November 25, 2015, 12:08 PM
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
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 (2)
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Eduardo Erlemann -
Joe