mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2025-10-31 13:10:19 -04:00
41 lines
871 B
Fortran
41 lines
871 B
Fortran
subroutine sfox_wave(fname)
|
|
|
|
! Called by WSJT-X when it's time for SuperFox to transmit. Reads array
|
|
! itone(1:151) from disk file 'sfox_2.dat' in the writable data directory.
|
|
|
|
parameter (NWAVE=(160+2)*134400*4) !Max WSJT-X waveform (FST4-1800 at 48kHz)
|
|
parameter (NN=151,NSPS=1024)
|
|
character*(*) fname
|
|
integer itone(151)
|
|
real*8 dt,twopi,f0,baud,phi,dphi
|
|
|
|
common/foxcom/wave(NWAVE)
|
|
|
|
open(25,file=trim(fname),status='unknown',err=900)
|
|
read(25,'(20i4)',err=900,end=900) itone
|
|
close(25)
|
|
|
|
! Generate the SuperFox waveform.
|
|
|
|
dt=1.d0/48000.d0
|
|
twopi=8.d0*atan(1.d0)
|
|
f0=750.0d0
|
|
phi=0.d0
|
|
baud=12000.d0/NSPS
|
|
k=0
|
|
do j=1,NN
|
|
f=f0 + baud*mod(itone(j),128)
|
|
dphi=twopi*f*dt
|
|
do ii=1,4*NSPS
|
|
k=k+1
|
|
phi=phi+dphi
|
|
xphi=phi
|
|
wave(k)=sin(xphi)
|
|
enddo
|
|
enddo
|
|
|
|
900 continue
|
|
|
|
return
|
|
end subroutine sfox_wave
|