queue as buffer?

[Balaji_DP]

hello,

i am in frequency domain application, my scan rate is 100ms and sampling  is 10kHz. sampling rate canbe varried but loop rate always 100ms.

my question is if i use FFT with 10KHz samples with 100ms loop rate, it will not works. rather i should change my loop rate = 1000ms, then only i will get it right spectrum.

while i using 100ms loop rate  with 10kHz samples i have to create a temporary buffer to put a samples of data, could you suggest any other way to hold these samples on temporary location like a buffer...

can able to  use queue for this...?

[johnsold]

It is difficult to tell from your description what the problem might be.  Please post your code with some typical data saved as default.

With a 10 kHz sampling rate and reading data every 100 ms you will have 1000 samples to analyze.   You should be able to do an FFT on a dataset of that size in well under 100 ms.  What else is going on in the loop?

Queues can be a good way to make a buffer, depending on what you are doing with the data.  A shift register can be used.  Initialize the array outside the loop and use Replace Array Subset inside.  LVOOP.  Action Engines.   Lots of ways to make buffers.

Lynn