FRF Overlap Option

[JK1]

Hai all,
           I am computing FRF using the functions available in SVT.  Am using diadem for the same activity for the same signal.  Diadem has an option '% Overlap' in the FRF options but this option is not available in labview FRF vi.  how can i implement the same operation in labview is there any workaround.  Am also interested in knowing the technical operation that this 'overlap' function performs. 
Any help would be appreciated


With Regards,
JK

[Brooks_C]

Hello JK,

I believe you'll find the same setting available on the SVFA Zoom Frequency Response (Mag-Phase).vi under the Zoom Settings input.  If you right click on this input and select create control this should create a cluster with this setting available.  If this isn't the particular FRF VI that you're using I would recommend using the context help (press control + h and hover the mouse over the FRF VI) and clicking on the detailed help for the VI.  This should list a description of all the inputs and outputs and you should see the % Overlap option.

I hope this helps, and have a great night!

[JK1]

Hai,

I found the option.  But zoom vi's never return data in a single execution ie., they wait for specified number of points to arrive then carry out analysis.  My operation is not live acquisition but it is generating report where in the logged data is passed to vi and the result is shown in single shot.  Is there a way out for this type of operation.

With regards,
JK

[Brooks_C]

Hello JK,

It sounds like what you'll want to do is read your data from your file in chucks using a loop rather than a single read.  This will allow you to pass data into the FRF VI in smaller pieces so that you can simulate the "live acquisition."

Have a great weekend!