Supported Modes: FT8, JT65, JT9, JT4, QRA64, ISCAT, MSK144, and WSPR.
Developed in 2001 by Joe (K1JT), original for EME weak signal decoding, JT65 and JT9 were widely used on the HF bands too.
In 2017 with version 1.8-0-RC1 FT8 as a fast mode with only 15 seconds per over was introduced.
FT8 was worldwide accepted by the users within days, even it has some serious disadvantages against JT65/JT9 used in JTDX.
- Minimum signal -20db, the lowest signal I decoded until now had -19db but the QSO had so much repeats it took longer than a typical JT65 QSO...
- No multisignal decoding, so more than one station answering a CQ means no decoding.
- Rapid QSB conditions may result in no decoding too.
Link to WSJT-X website