onboard digital filter on 5102??

[ltok]

Hi,

I would like to know if there is a hardware digital filter on 5102. Does all scope/digitizer cards have an onboard hardware digital filter?? If there are cards that have onboard hardware digital filter, can tell me some models??

I run this example [niScope EX Digital Filtering.vi]. I notice that the vi configure a digital filter and type of digital filter processing before the start of acquisition. This vi also perform a FFT using SCOPE function vi. Are all these done on the cards itself?? I am wondering if I am able to get unfiltered and filtered signal by using only 1 channel. I wonder if either of the steps below will work or not.

1. Acquire the normal unfiltered signal through 1 channel and do a software digital filter on the unfiltered signal to get a filtered signal. Is this feasible??

2. Configure 1 channel to acquire as per normal and another channel to have digital filter and get unfiltered and filtered signals from the channels respectively. This will means that I will be using 2 channels. Can this be done??

Thank you & Regards

Lee

[Raajit_Lall]

Lee,

The 5102 does have on board signal processing on it.  If you look at the specifications tab on the product page for the 5102, you will see that it has Anti-aliasing and Low Pass filtering.  The property node in the example that you see does enable the onboard signal processing on the card.  There are software filters which are included in LabVIEW as well that you can use.  These are available in the  Signal Processing >> Filters tab.

Your second option is also feasable.  You would basically use the property node to set up filtering on one channel only using the Active Channel input. 

Hope that helps.

Regards,