error -2146959355 with ActiveX automation for Logical analyzer 16700

[blad]

Helge,

        Thanks, for the reply, are the file attached in this meassage (Re: error -2146959355 with ActiveX automation for Logical analyzer 16700)> I'm new to labview and trying to tackle FFT, I've beed playing with version 8 but all the examples are done with a sine cosine function(sinewave) and then convert to FFT.  I'll try your examples.

[blad]

Heldge,

I could capture the data from the logic analyzer using your example files, but how do you convert the data to FFT, by the way I'm using Labview 7.1. Thanks again.

[HelgeS]

The full version of Labview (not the basic version) contains a lot of signal processing stuff, including FFT. Probably comparable to, e.g., the SIignal Processing toolbox of Matlab. I've been using this in versions 4, 5.1 and 7.1.

As an example, you feed a 1-D vector of samples into a primitive or VI, and out you get an FFT result. There are plenty of options to this, including window functions, real ffts, complex ffts, periodograms, etc.

I once made an FFT with the basic version of Labview. In that case, I copied the algorithm from some C function and translated to Labview. It was much slower, so I wouldn't recommend it.

Ask NI what you need in terms of versions, in order to do FFT and signal processing.