JTTY
A newer weak-signal typing mode from the makers of FT8, sent in short continuous frames rather than timed turns.
ModeJTTY
FamilyWeak-signal digital
Audio exampleComing
What does it sound like?
Plate 31Weak-signal digital
A steady four-tone warble, similar to FT4 but without the regular on-off rhythm of timed turns.
Field marks4 tones31.25 baudNo fixed turns
Who uses it?
Amateur radio operators trying the newest WSJT-X release.
Where and when can I hear it?
The HF ham bands; new and still uncommon.