WSJT-X/lib/fst280/fst280_params.f90

! FT4S280
! LDPC(280,101)/CRC24 code, six 4x4 Costas arrays for sync, ramp-up and ramp-down symbols

parameter (KK=77)                     !Information bits (77 + CRC24)
parameter (ND=140)                    !Data symbols
parameter (NS=24)                     !Sync symbols 
parameter (NN=NS+ND)                  !Sync and data symbols (164)
parameter (NN2=NS+ND+2)               !Total channel symbols (166)
Further progress toward activating FST280 and FST280W in the GUI. 2020-06-16 16:59:40 -04:00			`! FT4S280`
			`! LDPC(280,101)/CRC24 code, six 4x4 Costas arrays for sync, ramp-up and ramp-down symbols`

			`parameter (KK=77) !Information bits (77 + CRC24)`
			`parameter (ND=140) !Data symbols`
			`parameter (NS=24) !Sync symbols`
			`parameter (NN=NS+ND) !Sync and data symbols (164)`
			`parameter (NN2=NS+ND+2) !Total channel symbols (166)`