PCI-6602, Semi Period Finite Buffered Position Benchmar

[Jabba]

Hi All,

I'm using a PCI-6602 to acquire semi period measurement in a buffered and finite way. I'm expected to acquire a signal with a rate at 3 MHz for a lenght of 5M measurements. 

I'm using Lv 2010 + Daqmx 9.4, and I'm façing a DMA overwritten issue when I apply a square signal over than 2 MHz.

The following link details some bench (done by NI) for same kind of measurements and results are better than mine:

http://digital.ni.com/public.nsf/allkb/A696607CD6864B568625692E004A9316

This document gives a 3.35 MHz perf for a finite semi period measurement. I think that this benchs were done with DAQ Trad, but I was expecting to obtain close results.

I'm using the basic example shipped with Lv (as detailed below), on a new and fast computer:

https://decibel.ni.com/content/docs/DOC-11278

Is there any up to date Daqmx made benchmark? If yes, is it possible to get an example to achieve a higher performance?

Thanks for your help.