NI-USB-6289 bandwidth

[brijjak]

Hello,

I have a question about NI USB-6289. I use this datalogging system and the NI SignalExpress Software to measure peak-to-peak noise on a sensor signal line.

Only the peak-to-peak value is important to me, I don’t need to have more information about the noise.

The value of the noise can be any frequency between around 10KHz and 18GHz.

We’re actually performing testing according to a specific EMC standard and we have to perform frequency sweeping.

I used a 1kHz recording frequency and switched off the low-pass filter in SignalExpress. I know using 1k logging frequency will not make me able the get effects of 1k multiples noises but it’s ok like this.

Do you think NI-USB-6289 is the right device? I’m afraid high frequency could be filtered by the device.

Thank you for your help

[ThiCop]

Hello brijjak,

If you switch off the low pass filter, then the bandwidth becomes 700kHz (see http://sine.ni.com/ds/app/doc/p/id/ds-24/lang/en).

So in this case the high-frequency noise will be filtered away.

If you're interested in looking for another solution, then don't hesitate to let us know so that I can get you into contact with the right people.