New Beta Version of FT4 Now Available

the WSJT-X Development Group has released another new beta version of the FT4 protocol now available for testing in WSJT-X 2.1.0-rc7

Changes, improvements, and bug fixes that have been made since WSJT-X 2.1.0-rc5 include:

  • T/R sequence length increased from 6.0 to 7.5 seconds

  • Symbol rate decreased from 23.4375 to 20.8333 baud

  • Signal bandwidth decreased from 90 Hz to 80 Hz

  • Allowable time offsets –1.0 < DT < +1.0 second

  • TX 4 message with “RRR” now allowed, except in contest messages

  • Audio frequency now sent to PSK Reporter

  • Third decoding pass added

  • Improved sensitivity: Threshold S/N is now –17.5 dB

  • Improved S/N calculation

  • In FT4 mode, Shift + F11/F12 moves transmit frequency plus or minus 100 Hz

Release candidate WSJT-X 2.1.0-rc7 will be available for beta-testing through 21st July 2019.

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