FT8

Unlike JT65 or JT9, transmit and receive cycles in FT8 each last about 15 seconds. ... Like JT65, FT8 requires accurate time synchronization. An auto-sequencing feature offers the option to respond automatically to the first decoded reply to your CQ.

Automatic Mode

• http://ae5x.blogspot.com/2019/08/using-bot-for-full-auto-ft8.html
• https://sourceforge.net/projects/wsjt-z/files/Packages/