FFT on DAQ

[Dost]

I   want to apply FFt on my data that iam acquirng from NI card.I am measuring Pressure and flow rate . i want to apply FFT on these data. i want to  know which  is more suitable way of doing this

1. should i save the data in array and then  pass this array to power spectrum VI of FFt

2. or should i directly connected my incoming signal to input of the Power spectrum VI. I am acquirng data at a rate of 1000 Hz  but during FFT number of samples are also important i want to know if i directly connect the incoming signal than how could i determine what are my number of sample of incoming data.

[PNHorn]

Hey Dost,

You've probably seen the answer I posted on your thread

http://forums.ni.com/ni/board/message?board.id=170&message.id=134704

But in case you haven't, I thought i would let you know.

Hope the information helps,

Best regards,

Peter H

Applications Engineer.

NIUK.