Hi Steve and all,
K9AN wrote:
> Ah, I just noticed that 1.5*1.46=2.2. So the entered TX frequency
> is the frequency of the lowest tone, presumably…
By convention, for all of the other modes in WSJT-X the frequency of a
transmission is described as that of the lowest tone. In JT9 and
especially JT65, where the lowest tone is the sync tone, this makes a
lot of sense. Also for JT4, in part because of the way that mode is
used for microwave EME. Wide tone spacings are often used, and QSOs
often start with single-tone CW transmissions at the frequency of the
lowest tone, for frequency-alignment purposes.
The case for WSPR is rather different, though. The four tones are
closely spaced and have equal weighting. It doesn't make much sense to
use one convention for the frequency of received signals (the center of
the four tones) and another convention for the transmitted signal (that
of the lowest tone). It seems that I should move the transmitted tones
lower by 1.5*12000/8192 = 2.197 Hz. I will do so.
-- 73, Joe, K1JT
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