Noticed today that huskysat stops sending data and sends only a carrier for about a second then starts back up, saw it do that 4 times last pass. DAC overflows?
Have you actually seen a carrier (like a single frequency spike/birdie)? Or are you talking about when the modulation seems to "hang" between a phase shift? I've noticed that, myself, but just ASSumed that it was normal (like the "dual carrier" tones that you see with the funcubes telemetry).
--Roy K3RLD
No this isn't the little short one you see when looking at it on a sdr, this is a solid carrier no modulation that is long enough for you say what's going on here and then boom we are back to the normal telem, this just started today.
kevin wa7fwf
On 2/8/2020 13:28, Roy Dean via AMSAT-BB wrote:
Noticed today that huskysat stops sending data and sends only a carrier for about a second then starts back up, saw it do that 4 times last pass. DAC overflows?
Have you actually seen a carrier (like a single frequency spike/birdie)? Or are you talking about when the modulation seems to "hang" between a phase shift? I've noticed that, myself, but just ASSumed that it was normal (like the "dual carrier" tones that you see with the funcubes telemetry).
--Roy K3RLD _______________________________________________ Sent via AMSAT-BB@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! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Kevin,
I saw the same thing twice today. Rare, and very distinctive.
73,
Alan WA4SCA
<-----Original Message----- <From: AMSAT-BB [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Kevin <via AMSAT-BB <Sent: Saturday, February 8, 2020 5:08 PM <To: amsat-bb@amsat.org <Subject: Re: [amsat-bb] huskysat-1 < <No this isn't the little short one you see when looking at it on a sdr, <this is a solid carrier no modulation that is long enough for you say <what's going on here and then boom we are back to the normal telem, <this just started today. < <kevin wa7fwf < <On 2/8/2020 13:28, Roy Dean via AMSAT-BB wrote: <>> Noticed today that huskysat stops sending data and sends only a carrier <>> for about a second then starts back up, saw it do that 4 times last pass. <>> DAC overflows? <> <> Have you actually seen a carrier (like a single frequency spike/birdie)? <> Or are you talking about when the modulation seems to "hang" between a <> phase shift? I've noticed that, myself, but just ASSumed that it was <> normal (like the "dual carrier" tones that you see with the funcubes <> telemetry). <> <> --Roy <> K3RLD <> _______________________________________________ <> Sent via AMSAT-BB@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! <> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb < <_______________________________________________ <Sent via AMSAT-BB@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! <Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Noticed today that huskysat stops sending data and sends only a carrier for about a second then starts back up
Observed the same during the pass at 0113Z. I wasn't capturing any telemetry at that point since I was manually tuning in and it hadn't locked. It sounds like a high pitch tone such as how an AM carrier sounds on a sideband receiver. About 1 second duration and then back to the data stream.
This happens when the satellite owners send a command to shift modes. The telemetry queues are drained and restarted with a pilot signal to help lock on.
On Sat, Feb 8, 2020 at 8:43 PM JoAnne K9JKM via AMSAT-BB amsat-bb@amsat.org wrote:
Noticed today that huskysat stops sending data and sends only a carrier for about a second then starts back up
Observed the same during the pass at 0113Z. I wasn't capturing any telemetry at that point since I was manually tuning in and it hadn't locked. It sounds like a high pitch tone such as how an AM carrier sounds on a sideband receiver. About 1 second duration and then back to the data stream.
-- 73 de JoAnne K9JKM k9jkm@amsat.org _______________________________________________ Sent via AMSAT-BB@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! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
participants (5)
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Alan -
Burns Fisher -
JoAnne K9JKM -
Kevin -
Roy Dean