Measure the time difference between a digital output and a responding analog input

[Ludwig72]

Hallo,

I use the following system:

• NI PXI-1044 with NI PXI-8109 controller
• NI PXI-2564 switch module to turn the power of my tested device on
• NI PXI-6259 multifunction DAQ to measure the responding signal jump

Both cards are at the same PXI-trigger-bus. For both, PXI-2564 and PXI-6259 I use DAQmx to program reading and writing the channels.

Now I want to measure the time delay between the digital output, that switches my device on and the analog input, that measures the reaction of my system.

I can't get it to work by myself, please help me!

Thank Ludwig.

[ADagli]

Hi Ludwig,

what have you tested so far?

Do you have any VIs which you can upload for us?

Best regards,

[Ludwig72]

The M-Series synchronisation mechanism dosn't work.

I don't know if a could address the PXI-trigger-bus directly?

[ADagli]

I did understand your problem.

But you said: "I can't get it to work by myself"

Therefore, you definitely have build some VIs. I would like to see them

[Ludwig72]

I have not any VIs. I had one but with every error I changed it to try other things. Because of no usable result I didn't saved anything.

[ADagli · Accepted solution]

Hi Ludwig,

if you can't give us any VI we have difficulties with helping you.

Because I donÄt know how your programm is build up it is not easy to tell where you should grip signals.

Here is a similar question to yours:

http://forums.ni.com/t5/LabVIEW/Best-way-to-measure-time/td-p/178704

and 2 external links:

http://www.ehow.com/how_8698983_measure-time-labview.html

http://objectmix.com/labview/385152-how-can-i-use-labview-measure-time-between-analog-pulses.html

[Ludwig72]

Hi Abduelkerim,

thank you for your help.

I wish, there was a function to use the PXI trigger bus to synchronize measurements.

Timer and Timestamps are not the exactest but an usable way.

Ludwig.