USB6221BNC | Continously aqu. Analog Input => Modifying => Analog Output with sync. Digital Trigger

[FullDuplexPeter]

Hi,

i've used the search function but didn't seem to find the right answer...

i use an USB 6221 BNC (this one) with Labview 2010 on a WinXP box.

i want to continously aquire an analog signal, process it in terms of adding an offset and output it again, together with a digital trigger signal which is synchronized with the analog output.

i've tried to modify one example VI (i think it was something "sync AI AO") but this is actually generating a new signal instead of using the aquired one.

and putting the write command into the loop always threw errors at me 😞

using DAQ Assistants aquiring and outputing was very easy...but i didn't manage to also output a correlated digital signal which doesn't drift in time 😞

(and i don't really feel good using DAQ Assistants)

i will post my slightly modified version of the example as soon as i'm in the lab again, just wanted to check out if someone perhaps had the same issue...

any help would greatly be appreciated!

best regards

peter

[Steve'O]

Hello Peter,

the best way would be to post your VI. Then i can see what you're doing and what could be wrong.

Regards,

Stefan

[FullDuplexPeter]

Thanks Steve'O.

i didn't manage to go into the lab the last days.

i hope i'm on the right track with my idea. i've attached the vi and also what i would like to see on my oscilloscope 😕

otherwise i would have to measure the phase shift by external means and always set it hard to my setup..

have a nice weekend!

best regards,

peter

[Steve'O]

Hello Peter,

sorry for your long wait.

Do you still have this problem?

I think there are several examples in the example finder to this issue.

I also cannot run your VI because a SubVI is missing.

Regards,

Stefan