I finally decoded my first FT4 mode signals on the 20 meter ham band this afternoon. The frequency is 14080 kHz. I had been decoding FT8 for the last couple of years, but wow -- FT4 is twice as fast. The transmissions are half as long as FT8, so a cluster of messages appears on my screen every 7.5 seconds, rather than the usual 15. The software I'm using is WSJT-X, by the originator of these modes. I don't know if FT4 is supported by other programs as well.
Some examples from the log, which is created automatically by the software:
191016_221715 14.080 Rx FT4 -7 0.1 532 CQ NG4C FM16
191016_221715 14.080 Rx FT4 -2 0.1 939 CQ KD0UNI EN17
191016_221723 10.140 Rx FT4 -3 0.2 626 PP5DE WW1WW R-15
191016_221723 10.140 Rx FT4 -12 0.1 857 KE3GK JF2KOZ PM84
191016_221730 10.140 Rx FT4 -8 0.2 532 CQ NG4C FM16
191016_221730 10.140 Rx FT4 -3 0.1 940 CQ KD0UNI EN17
191016_221915 10.140 Rx FT4 -10 0.3 532 JA2IQV NG4C R-16
191016_221923 10.140 Rx FT4 0 -0.0 626 PP5DE WW1WW R-15
191016_221930 10.140 Rx FT4 -12 0.2 532 JA2IQV NG4C R-16
191016_221930 10.140 Rx FT4 5 0.1 940 CQ KD0UNI EN17
191016_221938 10.140 Rx FT4 -4 -0.0 626 PP5DE WW1WW R-15
191016_221945 10.140 Rx FT4 -14 0.2 532 JA2IQV NG4C 73
Most of the entries show 10.140 mHz as the frequency, but that's only because I accidentally chose that frequency in the software's dropdown box. They were all received on 14.080.
Some examples from the log, which is created automatically by the software:
191016_221715 14.080 Rx FT4 -7 0.1 532 CQ NG4C FM16
191016_221715 14.080 Rx FT4 -2 0.1 939 CQ KD0UNI EN17
191016_221723 10.140 Rx FT4 -3 0.2 626 PP5DE WW1WW R-15
191016_221723 10.140 Rx FT4 -12 0.1 857 KE3GK JF2KOZ PM84
191016_221730 10.140 Rx FT4 -8 0.2 532 CQ NG4C FM16
191016_221730 10.140 Rx FT4 -3 0.1 940 CQ KD0UNI EN17
191016_221915 10.140 Rx FT4 -10 0.3 532 JA2IQV NG4C R-16
191016_221923 10.140 Rx FT4 0 -0.0 626 PP5DE WW1WW R-15
191016_221930 10.140 Rx FT4 -12 0.2 532 JA2IQV NG4C R-16
191016_221930 10.140 Rx FT4 5 0.1 940 CQ KD0UNI EN17
191016_221938 10.140 Rx FT4 -4 -0.0 626 PP5DE WW1WW R-15
191016_221945 10.140 Rx FT4 -14 0.2 532 JA2IQV NG4C 73
Most of the entries show 10.140 mHz as the frequency, but that's only because I accidentally chose that frequency in the software's dropdown box. They were all received on 14.080.
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