Results of IZ7SLZ 16K21A 6C 2S 2015-12-09

 18:00  no decode
 19:00  Eb/N0 = 4.4 dB  BER = 34.1%  rank 0 ph uniform
 20:00  Eb/N0 = 4.2 dB  BER = 34.5%  rank 0 ph  0 30 30 60
 21:00  Eb/N0 = 3.5 dB  BER = 35.5%  rank 0 ph uniform
 22:00  Eb/N0 = 7.5 dB  BER = 27.8%  rank 0 ph uniform
 23:00  Eb/N0 = 7.1 dB  BER = 28.8%  rank 0 ph uniform
 00:00  no further decodes

Easy decodes with such a strong signal, weakest was about -48 dB S/N
in 2.5kHz.   Symbol timing is within 30mS.

Andy wrote:

> I discovered by trial and error The FreqOffset window in
> EbNaut had ot be set to [minus]  -3Hz to compensate for the
> positive shift on the input - after spending a fruitless
> few minutes trying at +3Hz .   But I suppose this is the
> same meaning and sign as the start time offset...

It should have needed offset +3Hz.   Following the principle
of least surprise we would expect +3Hz to mean the signal is
at +3Hz in the input!

Maybe one of us needs to reverse the sign of the Q signal?
--
Paul Nicholson
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