Re: [Phys-l] spectrum analyzer requires more than FFT

["Bob Sciamanda" <trebor@winbeam.com>]

John,
There are texts which achieve symmetry by introducing a factor of 1/SQRT(N) 
in both the forward and the inverse DFT.  This seems to be even more 
symmetric than your introduction of two different factors  : dt in the 
forward DFT, and df in the inverse DFT.  Since df*dt = 1/N,  do you see any 
problem with this fix?


Bob Sciamanda
Physics, Edinboro Univ of PA (Em)
http://www.winbeam.com/~trebor/
trebor@winbeam.com
----- Original Message ----- 
From: "John Denker" <jsd@av8n.com>
To: "Forum for Physics Educators" <phys-l@carnot.physics.buffalo.edu>
Sent: Monday, August 21, 2006 7:29 PM
Subject: [Phys-l] spectrum analyzer requires more than FFT
> . . .
> I revised and extended my writeup on the practical details of
> Fourier transforms and spectrum analysis
>  http://www.av8n.com/physics/fourier-refined.htm
> . . .