Cannot make digital scope of work

LV 2010, RT, PXI-6602

All I want is a simple digital scope to watch a digital signal which comes out a COUNTER and to judge if another part of my software works.

I struggled all day trying to make connections and finally abandoned - LabVIEW just won't do.

So, I managed to find a cable and get the connection through the material (oh - the horror!).

I start a course of meter.

I directs the output to a specific terminal.

I wired (with physical wire) terminal on a DIGITAL INPUT port.

I made a spot to read than digital entry port.

I used a timed loop to read that entry port a bunch of times.

Then draw the results.

No matter what I do, I read a different frequency than what I'm asking.

He's still 85-90% of the period during which I was expecting.

For example, I'm sampling the port here at 1000 uSec or intervals of 1 mSec.

A check of the END TIMES, or the State FINISHED LATE shows absolutely no error.

But look at the transition of a parcel is sample 429, the next is in 1298. That's a difference of 869 samples or 869 mSec.

If I try to 10 mSec, instead of 1 ms, I get 134-45 = 89 or 890 mSec

If I generate 10 Hz and sample to 1 mSec, I get 138-48 = 90 or 900 mSec

So, which one is lying to me?

Is it really generate 10 Hz and I am in a position he bad?

Or am I just measure and it generates really 11.1 Hz when I ask for 10?

For example


Tags: NI Software

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