LabVIEW

cancel
Showing results for 
Search instead for 
Did you mean: 

LabView SignalExpress sweep step resets the Create DC Signal step

Solved!
Go to solution

Hi

 

I have a NI PXI4461 that I use in SignalExpress.

 

In my project, I have a sweep step that encompasses all my other steps. The project has a create DC signal step as first step within the sweep. The sweep step iterates the offset value of this DC signal.

 

Then, the DC signal is generated on one of the 4461 AO's and subsequently some measuremens are performed. At the next iteration, the DC value is changed and everything repeats again.

 

Then I plot the values of the measurements vs. the value of the offset signal at each iteration step using the "output signals" tab of the sweep step. It all works very fine except for a small problem.

 

The problem is that when the current iteration ends, instead of updating the offset value of the DC signal continuously, the program first briefly resets it to 0 and then sets to the desired value. I can see this if I capture the waveform generated by the AO on a scope. Due to reasons I can not explain here, I need the DC signal not to go to zero at each iteration but continuously change from the previous to the next value I assigned in the sweep step's parameters.

 

Is there a solution to this problem?

 

 

Thanks

 

Aleksandar Andreski

0 Kudos
Message 1 of 3
(2,682 Views)
You should post questions about SignalExpress in the SignalExpress Board.
0 Kudos
Message 2 of 3
(2,662 Views)
Solution
Accepted by topic author alek_a
I solved this by simply choosing "Continuous Samples" instead of "N samples" in the "Generate Analog signal" step.

So, I am going to tag this "solved".

Aleksandar
0 Kudos
Message 3 of 3
(2,639 Views)