How to increase the loop timer resolution ?

[charansai]

Hello everyone,

 I am using myRIO 1900 for my Active Noise Cancellation project. I need to process the audio signal @44.1kHz sample rate and 50 samples per frame . So, I am using myRIO High Throughput personality. 

Now my problem is simple, I want to measure the each iteration time ( loop time) . I went for normal tick count ( msec). Used in a standard way [https://decibel.ni.com/content/docs/DOC-11078]. 

But my indicator value is oscillating between 1 and 2. It is supposedly 1.13msec, but how to find the exact timer value ??

I think , I cannot increase the resolution of  tick count(msec) as it is by default has 1 msec resolution and I cannot use external clock source as I am using myRIO.

Help me how to calculate the precise loop time.

Thank You.

[Jacobson-ni]

This is a duplicate post of http://forums.ni.com/t5/LabVIEW/How-to-increase-the-loop-timer-resolution/td-p/3211161 where Natasftw offers some good advice.

[charansai]

Yeah sorry ! I posted in the both forums at the same time, as I am using high throughput personality fpga of myRIO, I thought I could get some help here also. Now I dont know how to delete a post in NI forums  !!! I will try to delete this post as soon as I found how to do it!

[Jacobson-ni]

No big deal, I mostly posted so people could know where to find the answer if they found this thread in the future.