Can i use the PCI-MIO-16E-1 card to acquire analog signals in the range 600Khz to 1.2Mhz?

[confused one]

Hi

I am currently working on capturing analog signals from an acoustic emission sensor via the PCI-MIO-16E-1 card. I realised that this card's maximum sampling rate is 1.25Ms/s which means i might have problems capturing signals in the high Khz or low Mhz range. Can i possibly do something to allow this card to capture signals in the range 600Khz to 1.2Mhz?

Thanks in advance,

Roy

[Jesse_O]

Hello Roy,

You are correct that the PCI-MIO-16E-1 can sample up to 1.25MHz.  Since the Nyquist rate is only 625KHz, you might want to consider buying a card that has a faster sampling rate.  Several of our S Series products offer speeds above 3 MHz. You can find more information on them here.

Alternatively, since the large signal bandwidth is 1MHz, you could alias your signal.  For example if you had a signal at 700kHz, it would alias back down to 300kHz.  There are some problems that can occur when doing this.  For example, one would be if you have a signal that spans between 400-600khz when sampling at 1MHz.  The better option would be to use a card that has a faster sampling rate, but you can give aliasing a try.

I hope this helps,

Jesse O.
Applications Engineering
National Instruments