Problems with Frequency analysis

Question

I use the frequency analysis a lot for comparing specific points on similar tracks.  Every once in a while, the freq anal will stop live-updating.  In fact, it will not register a changing in the cursor position on the edit or spectral freq view at all.  Has anyone had this problem and found a solution?
Thanks,
Senluga
ps, I have tried lowering the FFT size to no effect.

Answer 1

If you want to have the 'good frequencies', you must set your dt.
if you use LV6 and waveform, the dt is the inverse of your sampling
frequency.
If you use older version, you can set your dt buy bundling dt value and the
array of point. you also can set the multiplier value in the
attribute/propertie node.
dt is always the inverse of the sampling frequency.
Jerome LANGE
Strasbourg
[email protected]
"Colt" a écrit dans le message news:
506500000005000000EB7B0000-1021771306000@exchange.​ni.com...
> When I make for example an FFT, i want to see the frequencies on the
> x-axis which are in the signal.But in my Labview Diagramm the values
> on the x-axis have nothing to do with the frequencies in
my signal.The
> FFT seems to be correct,but the x-axis doesn't show what I want to
> see.I don't know what I have to change. In some NI examples it
> works,but I can't see why.