HI
It's strange, though!
It was possible to analyze some SFH audio files, assuming that either
everything is decoded or nothing is, in order to verify why the SuperFox almost
never reply to 9 users, but always only around 1,2,3 to 7 (few times above
7-9), even when the bandwidth is full of those calling it?
Able to understand why?
Even now, with signals above [+10] from CY9C and the band absolutely full, I
don't understand why it almost never responds to 9 calls—only to fewer, and
often significantly fewer.
Ok for the Dqrm, but I assume it has a fully packed call band, and I doubt it’s
only decoding 3, 4, 5, 6, or 7 out of possibly hundreds (though I’ve never seen
the RX side of the SuperFox to confirm this).
Is SF not decoding enough signals, unable to reply, or is there another issue?
What is certain is that the QSO rate drops significantly.
As for DT, they likely have at least a GPS system, I hope. But with DT using
remotes and PC+SDR, a DT of 0.9 is normal at latency remotized system. There’s
still room for decoding up to DT ~1.5, but if I factor in a potential margin of
error on possible end of ~0.4, that pushes it past ~1.9, and FT8 decoding would
fail.
Even having a correction option in the software would be interesting. However,
you'd still need to know the DT error to correct it accurately, which isn't
obvious unless you use the average DT from the RX that SF can see—but that’s
unreliable.
I've observed this issue on all three official SFH K8R N5J CY9C, as well as the
HH2AA "cracked"...
73
---
Franco
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