Dear Warren, Mal, LF Group,
I took the opportunity of your sked to try simultaneous reception of the Eu
/ NA QRSS windows - really, I was hoping G3XDV would be transmitting as
well, since he is only about 11km from me and would be a good challenge for
the receiver. I think it is possible by carefully adjusting the various
gains to reduce the "splatter" caused by such a local signal to allow the
copy of relatively DX signals within a few hertz. This didn't happen, but I
was able to simultaneously receive WD2XGJ, G3KEV, PA0A, RA3AGC and DF6NM.
The attachment shows signals from about 2245 - 0112utc; it is screen shots
from two instances of SpecLab edited together, and the scroll rate was
increased at about 0000, which is why the time markers don't match up
perfectly.
Concerning QSOs in QRSS with very long dot periods, I think this shows how
it is most important to agree the format and the protocol for the QSO before
starting. I think the generally accepted format goes something like:
XGJ KEV K (for a sked, or CQ KEV K for a random QSO, repeat as necessary)
...then...
KEV XGJ O K
XGJ KEV R O K
KEV XGJ R TU SK ...(end of QSO)
It is probably best to decide from experience who is likely to be the weaker
received signal, and for that station to make the initial calls, since then
subsequent overs are most likely to succeed. If one station fails to
completely receive an over, they should repeat their previous over so that
the other station can repeat also. Some will insist that complete callsigns
should be used for the initial overs, but I think most agree on the
abbreviated calls, especially for a sked. Some people omit the "K" at the
end of an over, or substitute an "E", but I think this is a bad idea because
under marginal conditions it is harder to tell when the other station has
stopped transmitting.
Hope this is helpful - better luck next time!
Cheers, Jim Moritz
73 de M0BMU
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