Software DVB-S demodulator
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Without Attenuator:
With Attenuator
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I'm starting to think that may have been a coincidence as I've just tried it again and cant get a lock!
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Here's the full screen, the sync_confidence seems to never get more than 10.
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The timing appears to lock it fluctuates between 1999.xx to 2000.xx - I get the circle but it seems to fade out and in at about 1Hz. The carrier recovery seems to look ok - but the buffers quickly rise to 8000.
When it worked the sync_confidence started going up and the buffers looked pretty static. I just don't seem to be able to repeat it.
This is all on the Beacon with a GPDO locked PLL.
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@SWL - markro92: Any chance to add in addition to just the BB gain slider also a RF gain slider (for those SDR like e.g. RTL SDR which support different setting of BB gain and RF frontend gain)?
This way one could comfortably bring some of the strong LNB levels down a bit without the use of attenuators by just applying manual frontend gain settings.
Just a suggestion.....not high priority.
And great to hear about Airspy
Keep up your very excellent good work.
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Looks like signals under 5dB are not decoded with RTL dongle
But i managed to almost recive the beacon with out to many lost bits, at least a steppforward:
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hello well now I have the new CPU with the coreldro 3 AVX system .. the dish I receive the signals of the OM but the constellation does not happen what can be non coding
73 Tony ik1hgi
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First remove the enabled from the carrier recovery Checkbox, that makes tuning easier.
then center the signal EXACT in the middle of the waterfall, sometimes you see a faint line in the middle, this is the pilot tone (appears not on all signals!)
Then again select the bitrate in the upper Right corner > 250/333 usw.
if you now see a CIRCLE in the IQ plot THEN enable the carrier recovery and you should see the four points there.
Now the stream to VLC should work.
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In some of the DATV Signals (in the AMSAT beacon too) you see a faint signal exactly in the middle of the Signal.
Decoding here works best when i click on this signal and so center the DATV signal using this "Pilot" tone.
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hello well now I have the new CPU with the coreldro 3 AVX system .. the dish I receive the signals of the OM but the constellation does not happen what can be non coding
73 Tony ik1hgi
Dear Tony, I see it hard. In my opinion it depends on your processor, from the photo I see that it is an i3. I with your same settings (more or less) I can barely see with an i5 the constellation and the video with audio on VLC. By
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Dear Tony, I see it hard. In my opinion it depends on your processor, from the photo I see that it is an i3. I with your same settings (more or less) I can barely see with an i5 the constellation and the video with audio on VLC. By
Hi Giuseppe thank you, yes I see the constellation happens but they are of slesciii not stable, even this morning I am not here the constellation I don't see, I don't see the tone of the binca line in descent but only the centering point, I see on the Amsat's warning the OM and I do the research and OK but I see nothing patience
73 ik1hgi Tony
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Tony, first of all yesterday many Signals were not good decodable.
On your 3rd Picture you see that the SR value (number below waterfall) is way of 250ks...
Try loop damping at 0,002 and loop gain about 2-4.
What are those many lines you see in the waterfall in pic 3&4?
They normally don't appear.
Also set BBb gain a little bit lower, here it works best when the signals are bright blue and decoding gets worse if they turn to yellow
vy73 DB8TF
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hello all ,
just to let now that h265 is NOT standard included in vlc (3.0.6)
73
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@MarKro:
I have a solid circle (but no carrier recovery working) in the IQ plot and sync confidence to 256 but when i show the modcodes following shows up:
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