Topband: FT-8 performance

[K4SAV]

W0BTU directed a question to me about JT-9.  I have never tested JT-9 so 
I don't have any information to supply on that subject.

The S/N number supplied by FT-8 was only a curiosity to me because I 
could see a huge disparity between what was being reported versus what I 
was observing on my receiver.  The reported S/N seems to be about 
useless, but the really important question was what is the lowest signal 
to noise FT-8 can decode,(real S/N, not the reported number). That was 
the main question I wanted to answer with testing.

A little off subject but people also need to stop using S/N numbers as a 
measure of antenna gain.

Jerry, K4SAV