subroutine gen65(message,mode65,samfac,nsendingsh,msgsent,iwave,nwave) ! Encodes a JT65 message into a wavefile. ! Executes in 17 ms on opti-745. parameter (NMAX=60*11025) !Max length of wave file character*22 message !Message to be generated character*22 msgsent !Message as it will be received character*3 cok !' ' or 'OOO' real*8 dt,phi,f,f0,dfgen,dphi,twopi,samfac integer*2 iwave(NMAX) !Generated wave file integer dgen(12) integer sent(63) logical first integer nprc(126) real pr(126) data nprc/1,0,0,1,1,0,0,0,1,1,1,1,1,1,0,1,0,1,0,0, & 0,1,0,1,1,0,0,1,0,0,0,1,1,1,0,0,1,1,1,1, & 0,1,1,0,1,1,1,1,0,0,0,1,1,0,1,0,1,0,1,1, & 0,0,1,1,0,1,0,1,0,1,0,0,1,0,0,0,0,0,0,1, & 1,0,0,0,0,0,0,0,1,1,0,1,0,0,1,0,1,1,0,1, & 0,1,0,1,0,0,1,1,0,0,1,0,0,1,0,0,0,0,1,1, & 1,1,1,1,1,1/ data twopi/6.283185307179586476d0/,first/.true./ save if(first) then do i=1,126 pr(i)=2*nprc(i)-1 enddo first=.false. endif call chkmsg(message,cok,nspecial,flip) if(nspecial.eq.0) then call packmsg(message,dgen) !Pack message into 72 bits nsendingsh=0 if(iand(dgen(10),8).ne.0) nsendingsh=-1 !Plain text flag call rs_encode(dgen,sent) call interleave63(sent,1) !Apply interleaving call graycode(sent,63,1) !Apply Gray code nsym=126 !Symbols per transmission nsps=4096 else nsym=32 nsps=16384 nsendingsh=1 !Flag for shorthand message endif if(mode65.eq.0) go to 900 ! Set up necessary constants dt=1.d0/(samfac*11025.d0) f0=118*11025.d0/1024 dfgen=mode65*11025.d0/4096.d0 phi=0.d0 i=0 k=0 do j=1,nsym f=f0 if(nspecial.ne.0 .and. mod(j,2).eq.0) f=f0+10*nspecial*dfgen if(nspecial.eq.0 .and. flip*pr(j).lt.0.0) then k=k+1 f=f0+(sent(k)+2)*dfgen endif dphi=twopi*dt*f do ii=1,nsps phi=phi+dphi if(phi.gt.twopi) phi=phi-twopi xphi=phi i=i+1 iwave(i)=32767.0*sin(xphi) enddo enddo iwave(nsym*nsps+1:)=0 nwave=nsym*nsps + 5512 call unpackmsg(dgen,msgsent) if(flip.lt.0.0) then do i=22,1,-1 if(msgsent(i:i).ne.' ') goto 10 enddo 10 msgsent=msgsent(1:i)//' OOO' endif if(nsendingsh.eq.1) then if(nspecial.eq.2) msgsent='RO' if(nspecial.eq.3) msgsent='RRR' if(nspecial.eq.4) msgsent='73' endif 900 return end subroutine gen65