Analyzing large TDMS files in time invervals

[CarstenPXI]

We have TMDS files that are several hours long (sampled at 1024 S/s).

We would like to measure the number of zero crossings and peaks in blocks one second long over the entire recording.  I can see that FFT has a Time Interval function, but I don't see any function of this nature for statistics. 

As an additional "nice" to have we would like to have these blocks overlapping 75%.

Carsten Thomsen

[Brad_Turpin]

Hi Carsten,

Are you wanting to convert a Tachometer pulse to a Revolutions channel?  If so, I have a VBScript I can send you.  If not, what do you do with the number of zero crossings and peaks?  Are you counting just negative peaks/zero crossings, just positive peaks/zero crossings, or both?  How do you define a peak?

Brad Turpin

DIAdem Product Support Engineer

National Instruments