That's harmonics. If it's 100Hz wide it's the 2nd harmonic, 150Hz wide it's
the 3rd,.....
Been seeing them a lot and you can divide the starting offset by 2 or 3 as
appropriate and find out who's doing it.
Quite a few ops overdriving their audio. Been more of them since Baker Island
with the older ops now transitioning to FT8 and not knowing how to set their
audio.
de Mike W9MDB
On Tuesday, July 31, 2018, 5:07:15 AM CDT, Claude Frantz
<claude.fra...@bayern-mail.de> wrote:
Hi All,
Sometimes, I have seen a strange signal on the air, in the usual FT8
"sub band". There are 8 tones in a bandwidth of 100 Hz and a TX duration
of 15 s. Is this a CLOVER signal or anything else ?
Best wishes,
Claude (DJ0OT)
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