btw I was able to recover at least the page with some explanations, even if it's in Russian!
https://web.archive.org/web/20…://luckytech.ru/3481.html
i2NDT Claudio
Posts by i2NDT
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the attached .pdf is the page with the "PHASE NOISE SPECIFICATION" DC7KG is talking about (taken from the AD UG-570 doc: ez.analog.com/cfs-file/__key/telligent-evolution-components-attachments/00-441-00-00-00-07-91-97/AD9361_5F00_Reference_5F00_Manual_5F00_UG_2D00_570.pdf ).
it will be quite difficult to find a TCXO or an OCXO with those specs.
that's probably the reason why AD engineers chose a crystal oscillator???
BTW I found this one by ABRACON: AST3TQ-40.000MHZ-5.
unfortunately it seems no longer in production and, more over, it's quite expensive: some 50€...
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you can try to join this "group.io" and ask there:
https://groups.io/g/NanoVNA-V2
best 73
de
i2NDT Claudio
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well...if a "digital" PTT is not available then let's go analogue!
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I see...but that is beyond my capabilities as it probably means that I have to modify the software somewhere!
Claudio
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bjr André F1ATB
is there a way to control an external changeover relay in case I want to do iso-frequency traffic and don't want to receive myself?
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hey Roberto:
HOT stuff!!!
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that's very interesting!
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sometimes the "WayBackMachine" is better...
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now the beacon seems OK with the LAV decoder!
I will try later with other decoders...
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now it is working!
this morning when I checked it was still jerky...but now it's ok!
I don't know what happened as I didn't touch my system configuration since yesterday morning...
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it could be interesting to get a report from those guys who use the Octagon receiver...
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unfortunately it happens also on my Windows 7 PC...and I haven't got updates since last february.
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hi Flo!
the software is still available here:
https://web.archive.org/web/20…ter-Ver1.72%20Install.zip
Claudio
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did you also increase the transponder bandwidth a little bit?
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hi DB8TF ,
what brand/type of OCXO are you using?
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I have a question:
what is the best value for LDPC?
and more over: if the LDPC value is bad who is the culprit? the transmitted signal that might be "distorted" or the receiving system?
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