al difference between frequency and phase modulation. 
</p>


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<p>I would call this issue a dead horse, but it is still causing confusion, even 40 years
down the road. So,
here are two CLM instruments, one performing 
phase modulation, the other performing frequency modulation.  I have tried to make the innards 
explicit at each step, and match the indices so that the instruments produce the same results given 
the same parameters.  Also, to lay a different controversy to rest, it sho