Hi Graham,
Am 24.08.2011 23:49, schrieb Graham:
It would be nice to start , with
the opening statement 'all things being equal' but as 'we' all
know that not quite the case , one of the problems being , not
all stations can send all the modes and then not all can
translate from audio .. so even if say WSPR or Ros MF or EME
where to be more efficient , not all can join in .
Yes, but what would you guess is the mode where most LF OPs can join
in? CW or QRSS/DFCW/HELL, i.e. a scrolling spectrogram running in ARGO,
SpecLab, Spectran... or WSPR? I would guess it's the spectrogram! :-)
From a communicating efficiency
point of view, MFSK will offer a higher efficiency compared
to single tone, but , as can be observed , LF operations tend to
take place in extended time scale so gain from time
integration has tended to be the path taken ..
Yes, that's it.
A simple eample: If WSPR "is 2 dB better than" QRSS-3 there would have
been NOTHING AT ALL visible of my beacon signal during the last night
on the grabbers of RN3AUS and 4X1RF and YO/4X1RF. But in QRSS-60 there
was a clear trace, detectable without any doubts. That's the simple
reason why this path has been taken.
73, Stefan/DK7FC
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