NI DAC Testing

[Rydin]

I need to measure all the values of a 8-bit DAC. For this I have a NI DIMM PXI 4070 to sample the currents and a PXI 6534 for sending out commands to set the next DAC value on the chip.

I use a for loop in which I first set the DAC then measure the current. This is very slow. I noticed that it was the config of the DIMM that took longest time. So I moved the config out of the for loop. But then I got an error message. For some strange reason the configuration of the DIMM could not be tranfered to the next iteration in the for loop.

Does anyone have a solution for this problem?



//Andreas

[Jimmie_A.]

Hello!

It is kind of difficult to get an understanding on what you are trying to achieve without seeing your application but to start with I would recommend you to look at the shipping examples that is installed with the driver (NI-DMM).

If you just have moved the DMM Configuration outside the loop but have the ‘niDMM Close.vi’ within the loop you will get an error the second iteration since you have already closed the instrument handle and it won’t be valid anymore.

Hope this helps!

[Aidah]

Hello there,

I need to measure all the values of a 10bits DAC. Of which, results will be collected to find the INL and DNL. Do you have any suggestions that could help me save all the data of the values which i have measured in the program, so that i could easily form the INL and DNL?

Regards,
Aidah