I have been asked by ICOM to webcast field day this year.
Unrelated, but it would be great if someone with a good satcom station recorded the passband of FO29. Not so much to get individual QSO's but to grasp what a full wideband transponder can carry.
IE, tune the passband from one end to the other at a constant rate.
Then again, and again, and again at the same rate. Maybe separate files for each scan so we can tell when a complete scan begins and ends.
This would give those who are unfamiliar with wideband linear transponder operation what the capability really is under FD loading...
Just a thought.
Bob, Wb4APR
I've recorded and posted SDR recordings and screenshots before. Might be more accessible for folks as a simple youtube video tuning from one end to another....of course, most of the time everyone is piled up in the middle 20khz.
73, Drew KO4MA
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Robert Bruninga Sent: Wednesday, June 25, 2014 11:25 PM To: amsat bb Subject: [amsat-bb] Recordings of FO29 Field Day passband...?
I have been asked by ICOM to webcast field day this year.
Unrelated, but it would be great if someone with a good satcom station recorded the passband of FO29. Not so much to get individual QSO's but to grasp what a full wideband transponder can carry.
IE, tune the passband from one end to the other at a constant rate.
Then again, and again, and again at the same rate. Maybe separate files for each scan so we can tell when a complete scan begins and ends.
This would give those who are unfamiliar with wideband linear transponder operation what the capability really is under FD loading...
Just a thought.
Bob, Wb4APR _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Excellent point, Drew -- SDR's can visualize and record the entire passband. I posted screenshots of the AO-07 and VO-52 passbands during field day last year, they're on my blog at:
http://kb5wia.blogspot.com/2013/06/arrl-field-day-2013-satellite-fun.html
Have fun!
Dave KB5WIA
On Wed, Jun 25, 2014 at 8:28 PM, Andrew Glasbrenner glasbrenner@mindspring.com wrote:
I've recorded and posted SDR recordings and screenshots before. Might be more accessible for folks as a simple youtube video tuning from one end to another....of course, most of the time everyone is piled up in the middle 20khz.
73, Drew KO4MA
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Robert Bruninga Sent: Wednesday, June 25, 2014 11:25 PM To: amsat bb Subject: [amsat-bb] Recordings of FO29 Field Day passband...?
I have been asked by ICOM to webcast field day this year.
Unrelated, but it would be great if someone with a good satcom station recorded the passband of FO29. Not so much to get individual QSO's but to grasp what a full wideband transponder can carry.
IE, tune the passband from one end to the other at a constant rate.
Then again, and again, and again at the same rate. Maybe separate files for each scan so we can tell when a complete scan begins and ends.
This would give those who are unfamiliar with wideband linear transponder operation what the capability really is under FD loading...
Just a thought.
Bob, Wb4APR _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Or use a FC dongle or other SDR software to record an IQ file for the transponder. You could see all the stations in the passband, then play again and listen to each one in turn.
-----Original Message----- From: Robert Bruninga bruninga@usna.edu To: amsat bb amsat-bb@amsat.org Sent: Thu, 26 Jun 2014 4:25 Subject: [amsat-bb] Recordings of FO29 Field Day passband...?
I have been asked by ICOM to webcast field day this year.
Unrelated, but it would be great if someone with a good satcom station recorded the passband of FO29. Not so much to get individual QSO's but to grasp what a full wideband transponder can carry.
IE, tune the passband from one end to the other at a constant rate.
Then again, and again, and again at the same rate. Maybe separate files for each scan so we can tell when a complete scan begins and ends.
This would give those who are unfamiliar with wideband linear transponder operation what the capability really is under FD loading...
Just a thought.
Bob, Wb4APR _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Better yet Bob,,
If they can do it on HF there is absolutely no reason why it could not be done for the transponders passband.
Use a SDR type of radio.
If they can actually record like CQWW actually record every band for the full 48 hours. And they can then forever actually look up an exact QSO say station violated the rules at 13:45 zulu in 20 meters at 10.027.776 they can actually que up that exact time in the contest and listen in live just like it is really happening.
I know a local VHF/UHF station that uses SDR now, and like during the recent June VHF/UHF contest, it isn'ty like the old days where you have to tune the whole bands looking for signals. He has on his monitor(s) All the bands 6, 2 220, 440, 902, 1296.. laid out in a spectrum monitor mode and all he has to do is keep an eye open for a pip of a signal on the passbands and click on it and work them.
So he can see all the band on every band, so there is no reason why what they do on HF can't be done on the birds passband. sEE THE WHOLE THING AND RECORD IT LIVE TO BE ABLE TO BE PLAYED JUST LIKE IT'S HAPPENING LIVE FOREVER MORE.
OOps caplock sorry wasn't yelling..
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 6/25/2014 10:25 PM, Robert Bruninga wrote:
I have been asked by ICOM to webcast field day this year.
Unrelated, but it would be great if someone with a good satcom station recorded the passband of FO29. Not so much to get individual QSO's but to grasp what a full wideband transponder can carry.
IE, tune the passband from one end to the other at a constant rate.
Then again, and again, and again at the same rate. Maybe separate files for each scan so we can tell when a complete scan begins and ends.
This would give those who are unfamiliar with wideband linear transponder operation what the capability really is under FD loading...
Just a thought.
Bob, Wb4APR _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
participants (5)
-
Andrew Glasbrenner -
David Palmer KB5WIA -
g0mrf＠aol.com -
Joe -
Robert Bruninga