digtal filter option of M-Series BAQ Board

[Share_Good]

Hi...

is the digital filter option of M-Series BAQ Board applicable to couter task...single low-frequency measurement about 15 KHz?

it some how does not work in my code...please help me...

[mickeyw]

Hi Share Good,

NI-Daqmx currently only supports digital line filtering on counter only.

There is a little more explanation and some sample code on this KB.

I hope this is of some assistance to you.

[Share_Good]

Hi...

can u pls look at the code attached and tell me where i am going wrong...?

i have also tried with different cutoff frequencies of the digital filter...but failed...
i dont get error but it is not effective....(not filtering the freqeuncies above the cutoffs)
i used PXI-6255 counters and a frequency source generates upto 2 MHz square wave with amplitude between 4-5 V

[mickeyw]

Hi,

This KB should help to solve your problem. You need to choose a supported value for the filter when enabling the digital filter, and enabling the filter is done via the use of a channel node.

By incorporating this and the attached example into your application you should achieve success. This link will also prove useful, as it gives instructions of how to programme an M-series filter.

I hope these resources are of some assistance to you and I wish you success with your application, if you have any more problems let me know.

Regards,

[Share_Good]

Hi Mike,

the link you have sent me is just perfect...

i have fixed the bug in my code...Thanks a lot...

[mickeyw]

Your welcome, I'm glad the issue could be fixed. I wish you success with your application.