diff --git a/jt9.txt b/jt9.txt
index b5a436886..8d29b1151 100644
--- a/jt9.txt
+++ b/jt9.txt
@@ -44,7 +44,7 @@ Receiving
 ---------
 1.  Apply noise blanking with the timf2 method
 2.  Filter to 1000 Hz bandwidth and downsample (1/8) to 1500 Hz, saving
-    complex data to array c0(1350000).  (FIR?  FFT2?)
+    complex data to array c0(1350000).  (use FIR?  NFFT2/NFFT2A?)
 3.  Compute symbol-length spectra at half-symbol steps.  Use for
     waterfall display s(22000) and save in ss(184,22000) and 
     savg(22000), for detecting sync vectors.
diff --git a/libm65/Makefile.MinGW b/libm65/Makefile.MinGW
index 8cc614a8b..0358891ca 100644
--- a/libm65/Makefile.MinGW
+++ b/libm65/Makefile.MinGW
@@ -47,7 +47,7 @@ OBJS3 = jt9sim.o gran.o
 jt9sim.exe: $(OBJS3) libm65.a
 	$(FC) -o jt9sim.exe $(OBJS3) libm65.a
 
-OBJS2 = jt9.o symspec.o timf2x.o timer.o
+OBJS2 = jt9.o symspec.o timf2x.o timer.o sync9.o
 jt9.exe: $(OBJS2) libm65.a
 	$(FC) -o jt9.exe $(OBJS2) libm65.a ../libfftw3f_win.a 
 
diff --git a/libm65/jt9.f90 b/libm65/jt9.f90
index b5d04a47a..6bdafb299 100644
--- a/libm65/jt9.f90
+++ b/libm65/jt9.f90
@@ -82,7 +82,7 @@ program jt9
         if(nhsym.ge.1 .and. nhsym.ne.nhsym0) then
 ! Emit signal readyForFFT
            call timer('symspec ',0)
-           call symspecx(k,ntrperiod,nsps,ndiskdat,nb,nbslider,pxdb,s,    &
+           call symspecx(k,ntrperiod,nsps,ndiskdat,nb,nbslider,pxdb,s,df3,  &
                 ihsym,nzap,slimit,lstrong)
            call timer('symspec ',1)
            nhsym0=nhsym
@@ -94,6 +94,7 @@ program jt9
 
      nutc=nutc0
      nstandalone=1
+     call sync9(ss,df3)
 !     call decode0(dd,ss,savg,nstandalone,nfsample)
   enddo
 
diff --git a/libm65/symspec.f90 b/libm65/symspec.f90
index 91b251930..66e7a9f51 100644
--- a/libm65/symspec.f90
+++ b/libm65/symspec.f90
@@ -1,5 +1,5 @@
-subroutine symspecx(k,ntrperiod,nsps,ndiskdat,nb,nbslider,pxdb,s,ihsym,   &
-     nzap,slimit,lstrong)
+subroutine symspecx(k,ntrperiod,nsps,ndiskdat,nb,nbslider,pxdb,s,df3,    &
+     ihsym,nzap,slimit,lstrong)
 
 ! Input:
 !  k         pointer to the most recent new data
@@ -141,9 +141,16 @@ subroutine symspecx(k,ntrperiod,nsps,ndiskdat,nb,nbslider,pxdb,s,ihsym,   &
 
   if(ihsym.eq.168) then
      do i=1,iz
-        write(71,3001) i*df3,savg(i),10.0*log10(savg(i))
-3001    format(f12.6,e12.3,f12.3)
+        write(71,3001) i,i*df3,savg(i),10.0*log10(savg(i))
+3001    format(i8,3f12.3)
      enddo
+
+     i0=673
+     do j=1,ihsym
+        write(72,3002) j,(ss(j,i),i=i0,i0+8)
+3002    format(i3,9f8.3)
+     enddo
+
   endif
 
 999 return
diff --git a/libm65/sync9.f90 b/libm65/sync9.f90
new file mode 100644
index 000000000..4a7fdb40a
--- /dev/null
+++ b/libm65/sync9.f90
@@ -0,0 +1,55 @@
+subroutine sync9(ss,df3)
+
+  parameter (NSMAX=22000)            !Max length of saved spectra
+  real ss(184,NSMAX)
+
+  integer ii(16)
+  integer isync(85)             !Sync vector
+  data isync/                                    &
+       1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,  &
+       1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,1,0,  &
+       0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,  &
+       0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,  &
+       1,0,0,0,1/
+  
+  ii=0
+  k=0
+  do i=1,85
+     if(isync(i).eq.1) then
+        k=k+1
+        ii(k)=2*i-1
+     endif
+  enddo
+
+  nz=1000.0/df3
+
+  smax=0.
+  lagmax=10
+  do n=1,nz
+     do lag=-lagmax,lagmax
+        sum=0.
+        do i=1,16
+           k=ii(i) + lag
+           if(k.ge.1) sum=sum + ss(k,n)
+        enddo
+        if(sum.gt.smax) then
+           smax=sum
+           npk=n
+        endif
+     enddo
+  enddo
+
+  print*,'npk:',npk
+  n=npk
+  do lag=-lagmax,lagmax
+     sum=0.
+     do i=1,16
+        k=ii(i) + lag
+        if(k.ge.1) sum=sum + ss(k,n)
+     enddo
+     write(*,3000) lag,sum
+3000 format(i3,f12.3)
+  enddo
+
+  return
+end subroutine sync9