Hi everyone!
Maybe I'm SO slowminded.. but I'll really appreciate any help from anyone!
I am using a VI similar to the given "Baseband FRF" on a DAQPad 6052E.
The VI uses AI config, start and read functions.
It'a buffered acquisition of data from two inputs.
White noise in each input.
I get the FRF function, obviously it's a DISCRETE object: a 1-D array of complex.
I must SUBTRACT a wave number function, which comes from a formula an is consequently a CONTINUOUS object, from the FRF function.
So I need to get from the output array of the FRF the following information: which is the actual frequency value of each actual amplitude value read from the buffer.
I can get the starting value of the function scan and ofcourse the FFT resolution df but HOW can I extract the info about what frequency value is coupled to each amplitude value?
I thin I need it in order to "sample" my continuous frequency function ( e.g. k=k(f) ) with the same df of the FRF BUT MOST OF ALL in order to couple the right values.. I mean: tho values, one from he FRF and one from the formula, REFERRED TO THE SAME discrete frequency value..
And df must be variable as I must change the sampling frequency of acquisition and the block size of the FFT..
I tried to .. let's say "unbundle" the output wafeform of each sub-sub-function of the FRF but I AM NOT ABLE TO UNDERSTAND HOW TO GET THESE TWO OBJECTS SYCHRONOUS. Maybe I am really slowminded but.. Thanks to anybody's help!
Wish every goodies to everybody. Berta.
